Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Chris Albertson]

McMaster Carr has M7 cap screws.  they are "class 12.1" screws made of
alloy steel.  Not cheap $3 to $7 each.  Look them up on-line.  They
"everything" even aluminum and left hand thread cap screws.
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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Dave Cole]

On 5/10/2016 7:27 AM, Mark wrote:
> On 05/09/2016 04:49 PM, andy pugh wrote:
>> On 9 May 2016 at 18:22, Dave Cole  wrote:
>>> Andy is probably going to want to stop there and pickup some arms since
>>> I heard he is coming to the Detroit area probably to hang out at the
>>> Ford glass house.  ;-)
>> Actually, I am sat in the office at Roush based in what appears to be
>> an abandoned police station. I amnot sure what to read into the fact
>> that there is an abandoned police station in Dearborn.
>>
>>
> It's not Dearborn anymore. We now lovingly call it "Dearbornistan."
>
> Mark
>
Dearborn is actually in much better shape since the Arabs moved in 20+ 
years ago.   That area was a lot like Detroit before the Arabs started 
pumping money into the area.
There is a large Arab population (compared to the rest of MI) there but 
also a substantial Jewish and Christian population there as well.I 
know families of each that live there and I go there several times per 
year.  Compared to the rest of the Detroit area, the area is very 
safe.However if you go to the far east end of Dearborn... or 
northeast ...
well then you've been warned.  Downtown Detroit is pretty safe,  the 
outer Detroit burbs are pretty safe, however the donut area around 
downtown is not so safe.That's why you can buy houses there for a 
few hundred dollars and back taxes in the "donut" area (seriously - 
check Zillow).

Dave


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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Mark]

On 05/09/2016 04:49 PM, andy pugh wrote:
> On 9 May 2016 at 18:22, Dave Cole  wrote:
>> Andy is probably going to want to stop there and pickup some arms since
>> I heard he is coming to the Detroit area probably to hang out at the
>> Ford glass house.  ;-)
> Actually, I am sat in the office at Roush based in what appears to be
> an abandoned police station. I amnot sure what to read into the fact
> that there is an abandoned police station in Dearborn.
>
>
It's not Dearborn anymore. We now lovingly call it "Dearbornistan."

Mark

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Gregg Eshelman]

If they have a metric screws by the pound sign, take a picture of it. :)

 
  From: Dave Cole <linuxcncro...@gmail.com>
 To: emc-users@lists.sourceforge.net 
 Sent: Monday, May 9, 2016 7:06 AM
 Subject: Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?
   
Gene,
Do you have any Rural King stores around you?
The local big Rural King is selling metric screws by the pound.
A little ironic I think;  They should probably be selling them by the 
Kilogram.  ;-)
That said; I doubt that they have 7mm screws if they are rare. But I 
know they have 6 and 8 mm screws by the lb and for about the same price
as SAE sizes.

   
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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Dave Cole]

Then you will fit right in!  ;-)

Dave

On 5/9/2016 5:55 PM, andy pugh wrote:
> On 9 May 2016 at 23:37, Dave Cole  wrote:
>> On Warren, You will drive by some seedy places as you go east of the
>> Southfield freeway and then it gets better. (The area is really quite safe)
> I _live_ in a seedy area. :-)
>

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[andy pugh]

On 9 May 2016 at 23:37, Dave Cole  wrote:
> On Warren, You will drive by some seedy places as you go east of the
> Southfield freeway and then it gets better. (The area is really quite safe)

I _live_ in a seedy area. :-)

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designed for the especial use of mechanical geniuses, daredevils and
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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Dave Cole]

On 5/9/2016 4:49 PM, andy pugh wrote:
> On 9 May 2016 at 18:22, Dave Cole  wrote:
>> Andy is probably going to want to stop there and pickup some arms since
>> I heard he is coming to the Detroit area probably to hang out at the
>> Ford glass house.  ;-)
> Actually, I am sat in the office at Roush based in what appears to be
> an abandoned police station. I amnot sure what to read into the fact
> that there is an abandoned police station in Dearborn.
>

Ah  the Jack Roush organization...   Hi Po Ford stuff, etc.Fun!

Police Station:  I think they may have given up and left.   ;-) Actually 
most of Dearborn is very safe.   No sidearms required.

Hey if you want a great place to go for after dinner snacks and you like 
*really* good ice cream.

Get on Warren road, east of the Southfield freeway  and go east to this 
place.
http://www.shatila.com/
http://www.shatila.com/directions.html

Also, if you are into Bakeries...  The Golden Bakery shown in the 
Shatila Map and the New Yasmeen bakery further east on the same side of 
the road is really good.
http://yasmeenbakery.com/adwert.html
But they sell most of their goods before noon so the bakeries will be 
short of goods or closed soon.  Shatila's stays open quite late.   A lot 
of people head there for desert after dinner.

My favorite is New Yasmeen's hot cheesy bread.   They pull it out of the 
brick oven and hand it to you.   Might be a good lunch stop.

On Warren, You will drive by some seedy places as you go east of the 
Southfield freeway and then it gets better. (The area is really quite safe)

I think Shatila may have the best ice cream period.  Their pastries are 
also extremely good.

Dave



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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[andy pugh]

On 9 May 2016 at 18:22, Dave Cole  wrote:
> Andy is probably going to want to stop there and pickup some arms since
> I heard he is coming to the Detroit area probably to hang out at the
> Ford glass house.  ;-)

Actually, I am sat in the office at Roush based in what appears to be
an abandoned police station. I amnot sure what to read into the fact
that there is an abandoned police station in Dearborn.


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atp
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designed for the especial use of mechanical geniuses, daredevils and
lunatics."
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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Peter Blodow]

I made some M35 taps by hand years ago when I built my observatory, it 
took two persons, though.
Peter

Am 09.05.2016 22:23, schrieb Adam McLeod:
> If you are lacking torque, another option is to only run the tap in to
> your first peck, then hand tap the rest.  There should be enough there
> to get the tap started nice and square, and M8 taps aren't too difficult
> to drive by hand with a decent wrench.
>
> Adam
>


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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Adam McLeod]

If you are lacking torque, another option is to only run the tap in to 
your first peck, then hand tap the rest.  There should be enough there 
to get the tap started nice and square, and M8 taps aren't too difficult 
to drive by hand with a decent wrench.

Adam

On 2016-05-07 22:49, Gene Heskett wrote:

> 
> But that will be loads of fun because with the 7mm tap in the chuck, I
> had to keep asking for a smaller peck per stroke because even in low
> gear, and the current limit in Jon's servo amp set to limit at about 15
> amps, 150% drive for that motors nameplate,

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Gene Heskett]

On Monday 09 May 2016 14:14:12 Nicklas Karlsson wrote:

> > > > Probably true, but IIRC they have a minimum order, and I am
> > > > running out of time, ...
> > >
> > > You might get lucky if you look at the lamp hook.
> >
> > Lamp hook?
>
> Yes, the lamp hooks in my roof use M7, I need longer screws but nobody
> sell, it is this built in kind of plastic box with threads in the
> bottom.

Our stuff on this side of the pond usually use 6-nc32's for that sort of 
stuff.  Too weak IMO.

Cheers, Gene Heskett
-- 
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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Gene Heskett]

On Monday 09 May 2016 13:22:41 Dave Cole wrote:

> Well, it looks like they are getting closer to you.
> http://www.ruralking.com/storelocator/index/index

I had to go to 75 miles to find 3 stores, but the distance claimed is a 
straight line path. 60 miles to Parkersburg but from here, on a good 
road, I-79 to US-50, its a lot closer to 100 miles.  You could cut the 
mileage some, at the expense of time as many of the roads that might cut 
the total mileage down to 90 or so, are also laid out by the only side 
winder rattlesnake every loosed in WV. 35 mph tops because the corners 
at that close together.

> They have expanded rapidly in Indiana.
> They are like a TSC on Steroids.
> They also sell a lot of things that go bang.   I think firearms is a
> substantial part of their business.

We could use that.

> Andy is probably going to want to stop there and pickup some arms
> since I heard he is coming to the Detroit area probably to hang out at
> the Ford glass house.  ;-)
> (Just kidding Andy - I drove across I-94 yesterday and didn't see a
> single shooting)

You must have blinked at the wrong time. :)

> Dave
>
> On 5/9/2016 11:49 AM, Gene Heskett wrote:
> > On Monday 09 May 2016 09:06:39 Dave Cole wrote:
> >> Gene,
> >> Do you have any Rural King stores around you?
> >
> > Never heard of them.  Where are you that you have one of those
> > critters nearby?
> >
> >> The local big Rural King is selling metric screws by the pound.
> >> A little ironic I think;  They should probably be selling them by
> >> the Kilogram.  ;-)
> >
> > BWG and a Chuckle. But probably wise since the Jane & Joe Sixpack's
> > here have never been able to make sense out of the metric system. 
> > In the 70's (IIRC) when some brands tried selling gasolene by the
> > litre, no one understood that about 4 made about a gallon, & the
> > pump handles stayed clean & the station owners starved until they
> > threw those meters in the ditch and brought back the gallon
> > calibrated ones. To them, it clearly was not a problem that needed
> > fixed.  Had it been mandated for at least a year, us 'merican's
> > would have coped or left it set where ever it ran out of gas...
> >
> >> That said; I doubt that they have 7mm screws if they are rare. But
> >> I know they have 6 and 8 mm screws by the lb and for about the same
> >> price as SAE sizes.
> >
> > I bought 2 ea 8mm1.25's in 25, 30, and 40mm lengths yesterday, and
> > was about $8 poorer when shuffling back out the door leaning on my
> > cane.  So by the pound or kg sales of metric has not yet arrived in
> > West Virginia.
> >
> > OTOH, what I can buy in Allen head caps are all the grade 12 equ to
> > an SAE NC or NF bolt. I might pull the threads out of the hole, but
> > have not put a stretch into one of them yet.  The 6mm failed by
> > pulling the threads out of the hole. Easy since that arbor is
> > home-made, out of 3/4" rod from TSC's stock iron bin, pretty soft
> > stuff in real life. 1065? I don't think its even that hard.
> >
> > If and when I ever get this block carved out and mounted in place of
> > the compound on my 7x12, which will stiffen and help de-chatter the
> > tool post mounting on my 7x12, I have some short lengths of mine
> > shafting in 1.25" diameters, and will make a newer one with a 3/4"
> > spud & driving faces at least 1.125" in diameter.
> >
> > But that stuff is seriously HARD steel.  I made the spools for the
> > dampers out of it, and on that 7x12, it wasn't easy and used up a
> > $150 pack of chips for my turning tools making 4 of them. $pensive,
> > but they did help, a lot.  Education costs money I guess, regardless
> > of how you get it. :)
> >
> > Thanks Dave.
> > [...]
> >
> > Cheers, Gene Heskett
>
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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Nicklas Karlsson]

> > > Probably true, but IIRC they have a minimum order, and I am running
> > > out of time, ...
> >
> > You might get lucky if you look at the lamp hook.
> 
> Lamp hook?

Yes, the lamp hooks in my roof use M7, I need longer screws but nobody sell, it 
is this built in kind of plastic box with threads in the bottom.

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Dave Cole]

Well, it looks like they are getting closer to you.
http://www.ruralking.com/storelocator/index/index
They have expanded rapidly in Indiana.
They are like a TSC on Steroids.
They also sell a lot of things that go bang.   I think firearms is a 
substantial part of their business.
Andy is probably going to want to stop there and pickup some arms since 
I heard he is coming to the Detroit area probably to hang out at the 
Ford glass house.  ;-)
(Just kidding Andy - I drove across I-94 yesterday and didn't see a 
single shooting)

Dave

On 5/9/2016 11:49 AM, Gene Heskett wrote:
> On Monday 09 May 2016 09:06:39 Dave Cole wrote:
>
>> Gene,
>> Do you have any Rural King stores around you?
> Never heard of them.  Where are you that you have one of those critters
> nearby?
>
>> The local big Rural King is selling metric screws by the pound.
>> A little ironic I think;  They should probably be selling them by the
>> Kilogram.  ;-)
> BWG and a Chuckle. But probably wise since the Jane & Joe Sixpack's here
> have never been able to make sense out of the metric system.  In the
> 70's (IIRC) when some brands tried selling gasolene by the litre, no one
> understood that about 4 made about a gallon, & the pump handles stayed
> clean & the station owners starved until they threw those meters in the
> ditch and brought back the gallon calibrated ones. To them, it clearly
> was not a problem that needed fixed.  Had it been mandated for at least
> a year, us 'merican's would have coped or left it set where ever it ran
> out of gas...
>
>> That said; I doubt that they have 7mm screws if they are rare. But I
>> know they have 6 and 8 mm screws by the lb and for about the same
>> price as SAE sizes.
> I bought 2 ea 8mm1.25's in 25, 30, and 40mm lengths yesterday, and was
> about $8 poorer when shuffling back out the door leaning on my cane.  So
> by the pound or kg sales of metric has not yet arrived in West Virginia.
>
> OTOH, what I can buy in Allen head caps are all the grade 12 equ to an
> SAE NC or NF bolt. I might pull the threads out of the hole, but have
> not put a stretch into one of them yet.  The 6mm failed by pulling the
> threads out of the hole. Easy since that arbor is home-made, out of 3/4"
> rod from TSC's stock iron bin, pretty soft stuff in real life. 1065? I
> don't think its even that hard.
>
> If and when I ever get this block carved out and mounted in place of the
> compound on my 7x12, which will stiffen and help de-chatter the tool
> post mounting on my 7x12, I have some short lengths of mine shafting in
> 1.25" diameters, and will make a newer one with a 3/4" spud & driving
> faces at least 1.125" in diameter.
>
> But that stuff is seriously HARD steel.  I made the spools for the
> dampers out of it, and on that 7x12, it wasn't easy and used up a $150
> pack of chips for my turning tools making 4 of them. $pensive, but they
> did help, a lot.  Education costs money I guess, regardless of how you
> get it. :)
>
> Thanks Dave.
> [...]
>
> Cheers, Gene Heskett

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Gene Heskett]

On Monday 09 May 2016 12:24:53 Nicklas Karlsson wrote:

> > Probably true, but IIRC they have a minimum order, and I am running
> > out of time, ...
>
> You might get lucky if you look at the lamp hook.

Lamp hook?

Cheers, Gene Heskett
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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Gene Heskett]

On Monday 09 May 2016 09:52:09 andy pugh wrote:

> On 9 May 2016 at 03:13, Gene Heskett  wrote:
> > Your 7mm holes, if 1.0 pitch, can probably be made into 8mm x1.0
> > holes for bolts you can get with the right drill &_ tap.
>
> I have 8x1 taps for proximity sensor holes, but I would reckon on
> having less luck finding M8x1 bolts than M7x1 bolts.

They (8x1's) are in the hens teeth category on this side of the pond too 
Andy. I have both taps and dies, so I could make them, but I've no 
hardening facilities.

Cheers, Gene Heskett
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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Nicklas Karlsson]

> Probably true, but IIRC they have a minimum order, and I am running out 
> of time, ...

You might get lucky if you look at the lamp hook.

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Gene Heskett]

On Monday 09 May 2016 09:27:26 Rick Lair wrote:

> Hello Gene,
>
> Not sure if it was mentioned,
>
> Have you looked at Mcmaster Carr, I see they have M7x1 SHCS, various
> lengths,
>
> http://www.mcmaster.com/#socket-head-cap-screws/=12c2urv
>
> And you could have them next day,
>
> Rick

Probably true, but IIRC they have a minimum order, and I am running out 
of time, so I made it work with some TSC bolts yesterday, and have it 
about 1/2 cut way thru the first cut by the time I called it beer thirty 
last night. Time being measured in how much longer my back will let me 
walk.

In the process last night, I came to the conclusion I was wasting time 
trying to drive it straight thru as the cutting face was, in the middle 
of the cut, some 4" wide on the rim of the saw blade.  So I stopped and 
wrote some code that put the blade at the rear of the cut and pushed the 
table to the rear by 45mm at 40mm a minute, then raised it .005mm and 
retraced it back the the starting point, then advanced 1mm at 1mm feed, 
then ran the y out and back.

And I just realized that .005mm for the rise I was thinking inches, so 
when I restart the rest of that cut, I'll edit that up a bit as the idea 
is to maintain some side clearance for the blade.  And in metric, .005mm 
isn't squat. 0.05 or even .1 would be more like it.  That first move at 
40mm/min, cutting a mm deeper, isn't running the motor current above 
3.25 amps, and its throwing a quite visible stream of iron dust out of 
the slot. Some dust on the retrace, and the net speed is about 10x what 
I could do without the y motion to concentrate the cut on a much smaller 
length of blade circumference.

At 400 revs, no sparks which would tell me I am burning up the diamonds, 
just iron dust all over.  I assume that is the desirable state of 
affairs since the blade was $45 USD.

Clearly, I need a power hacksaw. but I've no room left for one.

> On 05/09/2016 09:06 AM, Dave Cole wrote:
> > Gene,
> > Do you have any Rural King stores around you?
> > The local big Rural King is selling metric screws by the pound.
> > A little ironic I think;  They should probably be selling them by
> > the Kilogram.  ;-)
> > That said; I doubt that they have 7mm screws if they are rare. But I
> > know they have 6 and 8 mm screws by the lb and for about the same
> > price as SAE sizes.
> >
> > Dave
> >
> > On 5/7/2016 11:49 PM, Gene Heskett wrote:
> >> Greetings all;
> >>
> >> Trying to hold a 10" diamond saw blade yesterday, tight enough to
> >> keep it from slipping, I striped out the 6mm threads in my arbor.
> >>
> >> So today I bored it gently out to around .230" or 15/64's and
> >> re-tapped that to 7mm x1.0.  It wasn't until I was cleaning that up
> >> that I realized I had not seen any 7mm x1.0 screws on my side of
> >> the planet. So I assume that I may as well redo it for an 8mm screw
> >> tomorrow.
> >>
> >> But that will be loads of fun because with the 7mm tap in the
> >> chuck, I had to keep asking for a smaller peck per stroke because
> >> even in low gear, and the current limit in Jon's servo amp set to
> >> limit at about 15 amps, 150% drive for that motors nameplate, I was
> >> raising the divider that determined the additional stroke per peck
> >> until it was taking at least 7 or 8 pecks to tap one additional mm
> >> deeper.  Combine that with the tap I was using have a longer that
> >> normal nose taper, I hit the bottom of the hole and that locked the
> >> spindle so I'm standing there, noting the spindle had stopped and
> >> jon's servo amp was singing as it overload regulated.  Stopped
> >> lcnc, loosened the chuck to release the tap, ran the head up 6" or
> >> so, and unscrewed the tap from the hole. Threads look great, but I
> >> suspect there is not a 7mm cap screw about in these here parts. 
> >> Pure unobtainium comes to mind for the alloy. :)
> >>
> >> So, just out of curiosity, are 7mm bolts really that hard to find,
> >> or am I looking in the wrong local stores?
> >>
> >> NAPA perhaps?  Pricy there though.  Seems metric in the label makes
> >> them an additional $2 a bolt or nut.  Been there, done that. Should
> >> have gotten a free t-shirt for the price I paid for a 6 pack of 8mm
> >> self lockers. Bah.
> >>
> >> Home Depot, up in Bridgeport, 26 miles up the Super-Pot-Hole, aka
> >> I-79 has the best stock ATM, but I cannot recall seeing any 7's.
> >> 8's I can probably get locally at Tractor Supply.  In a decent
> >> alloy even.
> >>
> >> I also think my 8mm tap is a lot sharper than the black oxide
> >> finished 7mm is, so maybe I can get by driving it with the mill. 
> >> We'll find out tommorrow.
> >>
> >> Thanks everybody.
> >>
> >> Cheers, Gene Heskett
> >
> > 
> >-- Find and fix application performance issues faster with
> > Applications Manager Applications Manager provides deep performance
> > insights into multiple tiers of your business applications. It
> > resolves 

Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Gene Heskett]

On Monday 09 May 2016 09:06:39 Dave Cole wrote:

> Gene,
> Do you have any Rural King stores around you?

Never heard of them.  Where are you that you have one of those critters 
nearby?

> The local big Rural King is selling metric screws by the pound.
> A little ironic I think;  They should probably be selling them by the
> Kilogram.  ;-)

BWG and a Chuckle. But probably wise since the Jane & Joe Sixpack's here 
have never been able to make sense out of the metric system.  In the 
70's (IIRC) when some brands tried selling gasolene by the litre, no one 
understood that about 4 made about a gallon, & the pump handles stayed 
clean & the station owners starved until they threw those meters in the 
ditch and brought back the gallon calibrated ones. To them, it clearly 
was not a problem that needed fixed.  Had it been mandated for at least 
a year, us 'merican's would have coped or left it set where ever it ran 
out of gas...

> That said; I doubt that they have 7mm screws if they are rare. But I
> know they have 6 and 8 mm screws by the lb and for about the same
> price as SAE sizes.

I bought 2 ea 8mm1.25's in 25, 30, and 40mm lengths yesterday, and was 
about $8 poorer when shuffling back out the door leaning on my cane.  So 
by the pound or kg sales of metric has not yet arrived in West Virginia.

OTOH, what I can buy in Allen head caps are all the grade 12 equ to an 
SAE NC or NF bolt. I might pull the threads out of the hole, but have 
not put a stretch into one of them yet.  The 6mm failed by pulling the 
threads out of the hole. Easy since that arbor is home-made, out of 3/4" 
rod from TSC's stock iron bin, pretty soft stuff in real life. 1065? I 
don't think its even that hard.

If and when I ever get this block carved out and mounted in place of the 
compound on my 7x12, which will stiffen and help de-chatter the tool 
post mounting on my 7x12, I have some short lengths of mine shafting in 
1.25" diameters, and will make a newer one with a 3/4" spud & driving 
faces at least 1.125" in diameter.

But that stuff is seriously HARD steel.  I made the spools for the 
dampers out of it, and on that 7x12, it wasn't easy and used up a $150 
pack of chips for my turning tools making 4 of them. $pensive, but they 
did help, a lot.  Education costs money I guess, regardless of how you 
get it. :)

Thanks Dave.
[...]

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[andy pugh]

On 9 May 2016 at 03:13, Gene Heskett  wrote:
>
> Your 7mm holes, if 1.0 pitch, can probably be made into 8mm x1.0 holes
> for bolts you can get with the right drill &_ tap.

I have 8x1 taps for proximity sensor holes, but I would reckon on
having less luck finding M8x1 bolts than M7x1 bolts.


-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Rick Lair]

Hello Gene,

Not sure if it was mentioned,

Have you looked at Mcmaster Carr, I see they have M7x1 SHCS, various
lengths,

http://www.mcmaster.com/#socket-head-cap-screws/=12c2urv

And you could have them next day,

Rick

On 05/09/2016 09:06 AM, Dave Cole wrote:
> Gene,
> Do you have any Rural King stores around you?
> The local big Rural King is selling metric screws by the pound.
> A little ironic I think;  They should probably be selling them by the 
> Kilogram.  ;-)
> That said; I doubt that they have 7mm screws if they are rare. But I 
> know they have 6 and 8 mm screws by the lb and for about the same price
> as SAE sizes.
>
> Dave
>
> On 5/7/2016 11:49 PM, Gene Heskett wrote:
>> Greetings all;
>>
>> Trying to hold a 10" diamond saw blade yesterday, tight enough to keep it
>> from slipping, I striped out the 6mm threads in my arbor.
>>
>> So today I bored it gently out to around .230" or 15/64's and re-tapped
>> that to 7mm x1.0.  It wasn't until I was cleaning that up that I
>> realized I had not seen any 7mm x1.0 screws on my side of the planet.
>> So I assume that I may as well redo it for an 8mm screw tomorrow.
>>
>> But that will be loads of fun because with the 7mm tap in the chuck, I
>> had to keep asking for a smaller peck per stroke because even in low
>> gear, and the current limit in Jon's servo amp set to limit at about 15
>> amps, 150% drive for that motors nameplate, I was raising the divider
>> that determined the additional stroke per peck until it was taking at
>> least 7 or 8 pecks to tap one additional mm deeper.  Combine that with
>> the tap I was using have a longer that normal nose taper, I hit the
>> bottom of the hole and that locked the spindle so I'm standing there,
>> noting the spindle had stopped and jon's servo amp was singing as it
>> overload regulated.  Stopped lcnc, loosened the chuck to release the
>> tap, ran the head up 6" or so, and unscrewed the tap from the hole.
>> Threads look great, but I suspect there is not a 7mm cap screw about in
>> these here parts.  Pure unobtainium comes to mind for the alloy. :)
>>
>> So, just out of curiosity, are 7mm bolts really that hard to find, or am
>> I looking in the wrong local stores?
>>
>> NAPA perhaps?  Pricy there though.  Seems metric in the label makes them
>> an additional $2 a bolt or nut.  Been there, done that. Should have
>> gotten a free t-shirt for the price I paid for a 6 pack of 8mm self
>> lockers. Bah.
>>
>> Home Depot, up in Bridgeport, 26 miles up the Super-Pot-Hole, aka I-79
>> has the best stock ATM, but I cannot recall seeing any 7's. 8's I can
>> probably get locally at Tractor Supply.  In a decent alloy even.
>>
>> I also think my 8mm tap is a lot sharper than the black oxide finished
>> 7mm is, so maybe I can get by driving it with the mill.  We'll find out
>> tommorrow.
>>
>> Thanks everybody.
>>
>> Cheers, Gene Heskett
> --
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> Applications Manager provides deep performance insights into multiple tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
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-- 
Thanks


Rick Lair
Superior Roll & Turning LLC
399 East Center Street
Petersburg MI, 49270
PH: 734-279-1831
FAX: 734-279-1166
www.superiorroll.com


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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Dave Cole]

Gene,
Do you have any Rural King stores around you?
The local big Rural King is selling metric screws by the pound.
A little ironic I think;  They should probably be selling them by the 
Kilogram.  ;-)
That said; I doubt that they have 7mm screws if they are rare. But I 
know they have 6 and 8 mm screws by the lb and for about the same price
as SAE sizes.

Dave

On 5/7/2016 11:49 PM, Gene Heskett wrote:
> Greetings all;
>
> Trying to hold a 10" diamond saw blade yesterday, tight enough to keep it
> from slipping, I striped out the 6mm threads in my arbor.
>
> So today I bored it gently out to around .230" or 15/64's and re-tapped
> that to 7mm x1.0.  It wasn't until I was cleaning that up that I
> realized I had not seen any 7mm x1.0 screws on my side of the planet.
> So I assume that I may as well redo it for an 8mm screw tomorrow.
>
> But that will be loads of fun because with the 7mm tap in the chuck, I
> had to keep asking for a smaller peck per stroke because even in low
> gear, and the current limit in Jon's servo amp set to limit at about 15
> amps, 150% drive for that motors nameplate, I was raising the divider
> that determined the additional stroke per peck until it was taking at
> least 7 or 8 pecks to tap one additional mm deeper.  Combine that with
> the tap I was using have a longer that normal nose taper, I hit the
> bottom of the hole and that locked the spindle so I'm standing there,
> noting the spindle had stopped and jon's servo amp was singing as it
> overload regulated.  Stopped lcnc, loosened the chuck to release the
> tap, ran the head up 6" or so, and unscrewed the tap from the hole.
> Threads look great, but I suspect there is not a 7mm cap screw about in
> these here parts.  Pure unobtainium comes to mind for the alloy. :)
>
> So, just out of curiosity, are 7mm bolts really that hard to find, or am
> I looking in the wrong local stores?
>
> NAPA perhaps?  Pricy there though.  Seems metric in the label makes them
> an additional $2 a bolt or nut.  Been there, done that. Should have
> gotten a free t-shirt for the price I paid for a 6 pack of 8mm self
> lockers. Bah.
>
> Home Depot, up in Bridgeport, 26 miles up the Super-Pot-Hole, aka I-79
> has the best stock ATM, but I cannot recall seeing any 7's. 8's I can
> probably get locally at Tractor Supply.  In a decent alloy even.
>
> I also think my 8mm tap is a lot sharper than the black oxide finished
> 7mm is, so maybe I can get by driving it with the mill.  We'll find out
> tommorrow.
>
> Thanks everybody.
>
> Cheers, Gene Heskett

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Gene Heskett]

On Sunday 08 May 2016 15:20:34 Nicklas Karlsson wrote:

> I have two lamps I should put in roof with M7 screws. The old ones are
> to short and nobody sells M7.
>
I finally figured out where I had buried the last tap & die set I'd 
bought at a factory outlet store about a year back, uncovered it and 
discovered I had both coarse and fine taps in several metric sizes. So 
my diamond saw blade is merrily gnawing its way thru the big block of 
cast, at 400 revs and about 0.25mm a minute again.

Your 7mm holes, if 1.0 pitch, can probably be made into 8mm x1.0 holes 
for bolts you can get with the right drill &_ tap.  I went from 7x1 to 
8x1.25 since I couldn't find any 8x1's at tractor supply.  Looks like 
its working ok.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Nicklas Karlsson]

I have two lamps I should put in roof with M7 screws. The old ones are to short 
and nobody sells M7.

On Sun, 8 May 2016 05:54:19 -0400
Gene Heskett  wrote:

> On Sunday 08 May 2016 02:59:12 Peter Blodow wrote:
> 
> > Gene,
> >
> >   M7 screws are as rare as white raven since this thread is only
> > printed in fine italics the DIN book. The only place I know of them
> > being used is for fastening the cooler fan of some Renault vehicles,
> > but merely in left handed version. No kidden. The French are supposed
> > to use M7 more frequently, like in constructing basement storage
> > shelves, but, as the saying goes, cooks in hell are english and
> > mechanics in hell are french... There is not much good with M7 anyway
> > since the threads are the same pitch as M6, so their holding force
> > will be about equal to M6, just making bolts heavier. Wonder how in
> > the world you got to own M7 cutting tools, I know nobody who ever even
> > saw one? (I myself have a left handed one, by buying a wholesale box
> > from the flea market). Moreover: If you managed to strip the M6
> > threads out, you won't gain much by replacing them with M7 since
> > thread depth is just the same.
> >
> > Use M8 and you're out of trouble, 25% more depth (if there is
> > sufficient spindle diameter). By the way: why don't you just cut those
> > spindle threads by hand, anyway, why bothering your itsi bitsi machine
> > and PSU with it, or did I miss something? On the other hand, owning a
> > lathe, why don't you make your own bolts to any size you want? I often
> > have to make strange, e.g. imperial threads and others, like camera
> > adapters (using pure unobtainium, as you say). It's easy.
> >
> > Greetings
> > Peter
> >
> Been considered, but I have only done one socket headed bolt in my life, 
> and it was difficult.  Hex head I can finish on the toy mill, but my 
> starter stock for such is 1/2" A2 rod.  Lots of waste. However its been 
> pointed out that 7mm might be only a small percentage stronger, so I 
> wouldn't gain a lot of thread strength. And since its already threaded 
> 7mm x1, I might not have enough to cut the 8mm thread cleanly. But 10mm 
> OTOH, I could bore with my threading boring bar I believe, since it can 
> be driven by g76 on my toy lathe.  So I'll get some 20mm, 25mm and 30mm 
> long in both 8 and 10 from TSC later today so I can grab various 
> thickness's of stuff on this arbor, and still have 15mm of thread 
> engagement regardless.  That was part of the original strip failure, I 
> needed a longer bolt to get more than about 5mm of thread engagement, 
> and my next longer bolt was hitting the bottom of the tapped hole or the 
> end of the threads since the tap is a long nose, not blind.  Clearly I 
> need a better selection of taps too.
> 
> All I need is a little red wagon load of money for that, even from 
> fleabay.  So we'll see what I can source yet today, and proceed 
> accordingly.
> 
> As for where I got that 7mm tap that someone asked, it was part of a 
> metric tap & die kit I got from Lowes several years ago, for about a $50 
> bill at the time.  In a flat, grey plastic form fitted molding with a 
> clear plastic cover lid dovetail fitted. The die handle has long since 
> failed of course. Die cast pot metal.  The taps aren't Mibro's but in 
> the larger sizes, they have held up well.  For the money, Mibro makes 
> good drill bits and taps.  Much better than todays Hansen brand.  
> Considerably sharper, and not near as brittle.
> 
> > Am 08.05.2016 05:49, schrieb Gene Heskett:
> > > Greetings all;
> > >
> > > Trying to hold a 10" diamond saw blade yesterday, tight enough to
> > > keep it from slipping, I striped out the 6mm threads in my arbor.
> > >
> > > So today I bored it gently out to around .230" or 15/64's and
> > > re-tapped that to 7mm x1.0.  It wasn't until I was cleaning that up
> > > that I realized I had not seen any 7mm x1.0 screws on my side of the
> > > planet. So I assume that I may as well redo it for an 8mm screw
> > > tomorrow.
> > >
> > > But that will be loads of fun because with the 7mm tap in the chuck,
> > > I had to keep asking for a smaller peck per stroke because even in
> > > low gear, and the current limit in Jon's servo amp set to limit at
> > > about 15 amps, 150% drive for that motors nameplate, I was raising
> > > the divider that determined the additional stroke per peck until it
> > > was taking at least 7 or 8 pecks to tap one additional mm deeper. 
> > > Combine that with the tap I was using have a longer that normal nose
> > > taper, I hit the bottom of the hole and that locked the spindle so
> > > I'm standing there, noting the spindle had stopped and jon's servo
> > > amp was singing as it overload regulated.  Stopped lcnc, loosened
> > > the chuck to release the tap, ran the head up 6" or so, and
> > > unscrewed the tap from the hole. Threads look great, but I suspect
> > > there is not a 7mm cap screw about in these here 

Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Gene Heskett]

On Sunday 08 May 2016 02:59:12 Peter Blodow wrote:

> Gene,
>
>   M7 screws are as rare as white raven since this thread is only
> printed in fine italics the DIN book. The only place I know of them
> being used is for fastening the cooler fan of some Renault vehicles,
> but merely in left handed version. No kidden. The French are supposed
> to use M7 more frequently, like in constructing basement storage
> shelves, but, as the saying goes, cooks in hell are english and
> mechanics in hell are french... There is not much good with M7 anyway
> since the threads are the same pitch as M6, so their holding force
> will be about equal to M6, just making bolts heavier. Wonder how in
> the world you got to own M7 cutting tools, I know nobody who ever even
> saw one? (I myself have a left handed one, by buying a wholesale box
> from the flea market). Moreover: If you managed to strip the M6
> threads out, you won't gain much by replacing them with M7 since
> thread depth is just the same.
>
> Use M8 and you're out of trouble, 25% more depth (if there is
> sufficient spindle diameter). By the way: why don't you just cut those
> spindle threads by hand, anyway, why bothering your itsi bitsi machine
> and PSU with it, or did I miss something? On the other hand, owning a
> lathe, why don't you make your own bolts to any size you want? I often
> have to make strange, e.g. imperial threads and others, like camera
> adapters (using pure unobtainium, as you say). It's easy.
>
> Greetings
> Peter
>
Been considered, but I have only done one socket headed bolt in my life, 
and it was difficult.  Hex head I can finish on the toy mill, but my 
starter stock for such is 1/2" A2 rod.  Lots of waste. However its been 
pointed out that 7mm might be only a small percentage stronger, so I 
wouldn't gain a lot of thread strength. And since its already threaded 
7mm x1, I might not have enough to cut the 8mm thread cleanly. But 10mm 
OTOH, I could bore with my threading boring bar I believe, since it can 
be driven by g76 on my toy lathe.  So I'll get some 20mm, 25mm and 30mm 
long in both 8 and 10 from TSC later today so I can grab various 
thickness's of stuff on this arbor, and still have 15mm of thread 
engagement regardless.  That was part of the original strip failure, I 
needed a longer bolt to get more than about 5mm of thread engagement, 
and my next longer bolt was hitting the bottom of the tapped hole or the 
end of the threads since the tap is a long nose, not blind.  Clearly I 
need a better selection of taps too.

All I need is a little red wagon load of money for that, even from 
fleabay.  So we'll see what I can source yet today, and proceed 
accordingly.

As for where I got that 7mm tap that someone asked, it was part of a 
metric tap & die kit I got from Lowes several years ago, for about a $50 
bill at the time.  In a flat, grey plastic form fitted molding with a 
clear plastic cover lid dovetail fitted. The die handle has long since 
failed of course. Die cast pot metal.  The taps aren't Mibro's but in 
the larger sizes, they have held up well.  For the money, Mibro makes 
good drill bits and taps.  Much better than todays Hansen brand.  
Considerably sharper, and not near as brittle.

> Am 08.05.2016 05:49, schrieb Gene Heskett:
> > Greetings all;
> >
> > Trying to hold a 10" diamond saw blade yesterday, tight enough to
> > keep it from slipping, I striped out the 6mm threads in my arbor.
> >
> > So today I bored it gently out to around .230" or 15/64's and
> > re-tapped that to 7mm x1.0.  It wasn't until I was cleaning that up
> > that I realized I had not seen any 7mm x1.0 screws on my side of the
> > planet. So I assume that I may as well redo it for an 8mm screw
> > tomorrow.
> >
> > But that will be loads of fun because with the 7mm tap in the chuck,
> > I had to keep asking for a smaller peck per stroke because even in
> > low gear, and the current limit in Jon's servo amp set to limit at
> > about 15 amps, 150% drive for that motors nameplate, I was raising
> > the divider that determined the additional stroke per peck until it
> > was taking at least 7 or 8 pecks to tap one additional mm deeper. 
> > Combine that with the tap I was using have a longer that normal nose
> > taper, I hit the bottom of the hole and that locked the spindle so
> > I'm standing there, noting the spindle had stopped and jon's servo
> > amp was singing as it overload regulated.  Stopped lcnc, loosened
> > the chuck to release the tap, ran the head up 6" or so, and
> > unscrewed the tap from the hole. Threads look great, but I suspect
> > there is not a 7mm cap screw about in these here parts.  Pure
> > unobtainium comes to mind for the alloy. :)
> >
> > So, just out of curiosity, are 7mm bolts really that hard to find,
> > or am I looking in the wrong local stores?
> >
> > NAPA perhaps?  Pricy there though.  Seems metric in the label makes
> > them an additional $2 a bolt or nut.  Been there, done that. Should
> > have gotten a 

Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Gene Heskett]

On Sunday 08 May 2016 02:50:55 Marcus Bowman wrote:

> On 8 May 2016, at 04:49, Gene Heskett wrote:
> > Greetings all;
> >
> > Trying to hold a 10" diamond saw blade yesterday, tight enough to
> > keep it from slipping, I striped out the 6mm threads in my arbor.
> >
> > So today I bored it gently out to around .230" or 15/64's and
> > re-tapped that to 7mm x1.0.  It wasn't until I was cleaning that up
> > that I realized I had not seen any 7mm x1.0 screws on my side of the
> > planet. So I assume that I may as well redo it for an 8mm screw
> > tomorrow.
> >
> > But that will be loads of fun because with the 7mm tap in the chuck,
> > I had to keep asking for a smaller peck per stroke because even in
> > low gear, and the current limit in Jon's servo amp set to limit at
> > about 15 amps, 150% drive for that motors nameplate, I was raising
> > the divider that determined the additional stroke per peck until it
> > was taking at least 7 or 8 pecks to tap one additional mm deeper. 
> > Combine that with the tap I was using have a longer that normal nose
> > taper, I hit the bottom of the hole and that locked the spindle so
> > I'm standing there, noting the spindle had stopped and jon's servo
> > amp was singing as it overload regulated.  Stopped lcnc, loosened
> > the chuck to release the tap, ran the head up 6" or so, and
> > unscrewed the tap from the hole. Threads look great, but I suspect
> > there is not a 7mm cap screw about in these here parts.  Pure
> > unobtainium comes to mind for the alloy. :)
> >
> > So, just out of curiosity, are 7mm bolts really that hard to find,
> > or am I looking in the wrong local stores?
>
> M7 x 1 used to be hard to find, over here (Scotland) but are easily
> available now. It's much the same for the Fine Series metric threads,
> which used to be available in central (mainland) Europe only, but are
> now available here too. I think the fact they are now made in China
> has solved those problems. So maybe the reach of global traders
> through eBay will help you too.
>
> Marcus

I considered that, then considered the shipping delay & the often 
outrageous shipping charges if it weighs over an ounce, and that I'd 
like to resume this project I've been putting off for years, and I'll 
make it an 8mm bolt I can source from Tractor Supply.  I'll see whats 
available in both 7 and 8, even 10mm just to stock up my bolt box.

Thanks Marcus.
  
> > NAPA perhaps?  Pricy there though.  Seems metric in the label makes
> > them an additional $2 a bolt or nut.  Been there, done that. Should
> > have gotten a free t-shirt for the price I paid for a 6 pack of 8mm
> > self lockers. Bah.
> >
> > Home Depot, up in Bridgeport, 26 miles up the Super-Pot-Hole, aka
> > I-79 has the best stock ATM, but I cannot recall seeing any 7's. 8's
> > I can probably get locally at Tractor Supply.  In a decent alloy
> > even.
> >
> > I also think my 8mm tap is a lot sharper than the black oxide
> > finished 7mm is, so maybe I can get by driving it with the mill. 
> > We'll find out tommorrow.
> >
> > Thanks everybody.
> >
> > Cheers, Gene Heskett
> > --
> > "There are four boxes to be used in defense of liberty:
> > soap, ballot, jury, and ammo. Please use in that order."
> > -Ed Howdershelt (Author)
> > Genes Web page 
> >
> > 
> >-- Find and fix application performance issues faster with
> > Applications Manager Applications Manager provides deep performance
> > insights into multiple tiers of your business applications. It
> > resolves application problems quickly and reduces your MTTR. Get
> > your free trial!
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> > https://lists.sourceforge.net/lists/listinfo/emc-users
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Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[andy pugh]

On 8 May 2016 at 04:49, Gene Heskett  wrote:
> So, just out of curiosity, are 7mm bolts really that hard to find

Yes. I bought an M7 tap for the very first time a few months ago. It's
a very uncommon size.
Used to hold the camshaft sprocket on a Yamaha R1, but not for much
else. I believe they used a lot on old Bugatti cars.

-- 
atp
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designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Peter Blodow]

Gene,

  M7 screws are as rare as white raven since this thread is only printed 
in fine italics the DIN book. The only place I know of them being used 
is for fastening the cooler fan of some Renault vehicles, but merely in 
left handed version. No kidden. The French are supposed to use M7 more 
frequently, like in constructing basement storage shelves, but, as the 
saying goes, cooks in hell are english and mechanics in hell are 
french... There is not much good with M7 anyway since the threads are 
the same pitch as M6, so their holding force will be about equal to M6, 
just making bolts heavier. Wonder how in the world you got to own M7 
cutting tools, I know nobody who ever even saw one? (I myself have a 
left handed one, by buying a wholesale box from the flea market). 
Moreover: If you managed to strip the M6 threads out, you won't gain 
much by replacing them with M7 since thread depth is just the same.

Use M8 and you're out of trouble, 25% more depth (if there is sufficient 
spindle diameter). By the way: why don't you just cut those spindle 
threads by hand, anyway, why bothering your itsi bitsi machine and PSU 
with it, or did I miss something? On the other hand, owning a lathe, why 
don't you make your own bolts to any size you want? I often have to make 
strange, e.g. imperial threads and others, like camera adapters (using 
pure unobtainium, as you say). It's easy.

Greetings
Peter


Am 08.05.2016 05:49, schrieb Gene Heskett:
> Greetings all;
>
> Trying to hold a 10" diamond saw blade yesterday, tight enough to keep it
> from slipping, I striped out the 6mm threads in my arbor.
>
> So today I bored it gently out to around .230" or 15/64's and re-tapped
> that to 7mm x1.0.  It wasn't until I was cleaning that up that I
> realized I had not seen any 7mm x1.0 screws on my side of the planet.
> So I assume that I may as well redo it for an 8mm screw tomorrow.
>
> But that will be loads of fun because with the 7mm tap in the chuck, I
> had to keep asking for a smaller peck per stroke because even in low
> gear, and the current limit in Jon's servo amp set to limit at about 15
> amps, 150% drive for that motors nameplate, I was raising the divider
> that determined the additional stroke per peck until it was taking at
> least 7 or 8 pecks to tap one additional mm deeper.  Combine that with
> the tap I was using have a longer that normal nose taper, I hit the
> bottom of the hole and that locked the spindle so I'm standing there,
> noting the spindle had stopped and jon's servo amp was singing as it
> overload regulated.  Stopped lcnc, loosened the chuck to release the
> tap, ran the head up 6" or so, and unscrewed the tap from the hole.
> Threads look great, but I suspect there is not a 7mm cap screw about in
> these here parts.  Pure unobtainium comes to mind for the alloy. :)
>
> So, just out of curiosity, are 7mm bolts really that hard to find, or am
> I looking in the wrong local stores?
>
> NAPA perhaps?  Pricy there though.  Seems metric in the label makes them
> an additional $2 a bolt or nut.  Been there, done that. Should have
> gotten a free t-shirt for the price I paid for a 6 pack of 8mm self
> lockers. Bah.
>
> Home Depot, up in Bridgeport, 26 miles up the Super-Pot-Hole, aka I-79
> has the best stock ATM, but I cannot recall seeing any 7's. 8's I can
> probably get locally at Tractor Supply.  In a decent alloy even.
>
> I also think my 8mm tap is a lot sharper than the black oxide finished
> 7mm is, so maybe I can get by driving it with the mill.  We'll find out
> tommorrow.
>
> Thanks everybody.
>
> Cheers, Gene Heskett


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Re: [Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Marcus Bowman]

On 8 May 2016, at 04:49, Gene Heskett wrote:

> Greetings all;
> 
> Trying to hold a 10" diamond saw blade yesterday, tight enough to keep it 
> from slipping, I striped out the 6mm threads in my arbor.
> 
> So today I bored it gently out to around .230" or 15/64's and re-tapped 
> that to 7mm x1.0.  It wasn't until I was cleaning that up that I 
> realized I had not seen any 7mm x1.0 screws on my side of the planet.  
> So I assume that I may as well redo it for an 8mm screw tomorrow.
> 
> But that will be loads of fun because with the 7mm tap in the chuck, I 
> had to keep asking for a smaller peck per stroke because even in low 
> gear, and the current limit in Jon's servo amp set to limit at about 15 
> amps, 150% drive for that motors nameplate, I was raising the divider 
> that determined the additional stroke per peck until it was taking at 
> least 7 or 8 pecks to tap one additional mm deeper.  Combine that with 
> the tap I was using have a longer that normal nose taper, I hit the 
> bottom of the hole and that locked the spindle so I'm standing there, 
> noting the spindle had stopped and jon's servo amp was singing as it 
> overload regulated.  Stopped lcnc, loosened the chuck to release the 
> tap, ran the head up 6" or so, and unscrewed the tap from the hole.  
> Threads look great, but I suspect there is not a 7mm cap screw about in 
> these here parts.  Pure unobtainium comes to mind for the alloy. :)
> 
> So, just out of curiosity, are 7mm bolts really that hard to find, or am 
> I looking in the wrong local stores?
> 

M7 x 1 used to be hard to find, over here (Scotland) but are easily available 
now. 
It's much the same for the Fine Series metric threads, which used to be 
available in central (mainland) Europe only, but are now available here too. I 
think the fact they are now made in China has solved those problems. So maybe 
the reach of global traders through eBay will help you too.

Marcus
 
> NAPA perhaps?  Pricy there though.  Seems metric in the label makes them 
> an additional $2 a bolt or nut.  Been there, done that. Should have 
> gotten a free t-shirt for the price I paid for a 6 pack of 8mm self 
> lockers. Bah.
> 
> Home Depot, up in Bridgeport, 26 miles up the Super-Pot-Hole, aka I-79 
> has the best stock ATM, but I cannot recall seeing any 7's. 8's I can 
> probably get locally at Tractor Supply.  In a decent alloy even.
> 
> I also think my 8mm tap is a lot sharper than the black oxide finished 
> 7mm is, so maybe I can get by driving it with the mill.  We'll find out 
> tommorrow.
> 
> Thanks everybody.
> 
> Cheers, Gene Heskett
> -- 
> "There are four boxes to be used in defense of liberty:
> soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page 
> 
> --
> Find and fix application performance issues faster with Applications Manager
> Applications Manager provides deep performance insights into multiple tiers of
> your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users


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[Emc-users] 7mmx1.0 decently hard cap screw, how scarce are they?

[Gene Heskett]

Greetings all;

Trying to hold a 10" diamond saw blade yesterday, tight enough to keep it 
from slipping, I striped out the 6mm threads in my arbor.

So today I bored it gently out to around .230" or 15/64's and re-tapped 
that to 7mm x1.0.  It wasn't until I was cleaning that up that I 
realized I had not seen any 7mm x1.0 screws on my side of the planet.  
So I assume that I may as well redo it for an 8mm screw tomorrow.

But that will be loads of fun because with the 7mm tap in the chuck, I 
had to keep asking for a smaller peck per stroke because even in low 
gear, and the current limit in Jon's servo amp set to limit at about 15 
amps, 150% drive for that motors nameplate, I was raising the divider 
that determined the additional stroke per peck until it was taking at 
least 7 or 8 pecks to tap one additional mm deeper.  Combine that with 
the tap I was using have a longer that normal nose taper, I hit the 
bottom of the hole and that locked the spindle so I'm standing there, 
noting the spindle had stopped and jon's servo amp was singing as it 
overload regulated.  Stopped lcnc, loosened the chuck to release the 
tap, ran the head up 6" or so, and unscrewed the tap from the hole.  
Threads look great, but I suspect there is not a 7mm cap screw about in 
these here parts.  Pure unobtainium comes to mind for the alloy. :)

So, just out of curiosity, are 7mm bolts really that hard to find, or am 
I looking in the wrong local stores?

NAPA perhaps?  Pricy there though.  Seems metric in the label makes them 
an additional $2 a bolt or nut.  Been there, done that. Should have 
gotten a free t-shirt for the price I paid for a 6 pack of 8mm self 
lockers. Bah.

Home Depot, up in Bridgeport, 26 miles up the Super-Pot-Hole, aka I-79 
has the best stock ATM, but I cannot recall seeing any 7's. 8's I can 
probably get locally at Tractor Supply.  In a decent alloy even.

I also think my 8mm tap is a lot sharper than the black oxide finished 
7mm is, so maybe I can get by driving it with the mill.  We'll find out 
tommorrow.

Thanks everybody.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

--
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Applications Manager provides deep performance insights into multiple tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
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