Re: making a tap for the 5/8-4 acme thread

[MWF]

Joe,
I, too, attempted to find a source for the Tap - figuring I'd be helping folks in The Group that wanted/needed one.
I contacted a significant distributor - and here is the reply I received after their two to three day attempts to source a tap for me:
(Note - there was more info in their reply - but it had a "non-disclosure" warning at the bottom.  Don't feel its worth seeking their "permission" to share it - because it is of no value since the "bottom line" is:  They can't source the tap.)

It appears that your method is the way to go.  Perhaps you (or Tim if he has a tap) can calculate how much it will cost you to make a number of the blocks with your tap and let The Group know what we'd be looking at cost wise (with your profit and S&H included in the price).  Based upon that, you could take orders - if that's a viable task for you to entertain.

Have a Wonderful Week - and thank you for sharing you thoughts and efforts with The Group.

Mac

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Sorry,  but Your Quote Request below will be a No Quote for Xxxxxxx (the corp's name was here).

I have Checked with Our Sources and they say that a 5/8-4 is too coarse of a thread

Thank You for the Opportunity to Quote.

 

NONSTOCK REQUEST

 

ITEM #/EDP #/ MODEL # N/A      

 

BRAND NAME / OR IF BRAND SPECIFIC:N/A

 

DESCRIPTION OF ITEM:  5/8 DIAM – 4 PITCH,  ACME THREAD ROD  TAP

LENGTH 2 INCHES

USING ON NYLON AND DELRIN

 

QUANITY NEEDED: 2 TO 4 - POSSIBLY MORE

 

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-----Original Message-----
From: 'joe biunno' via Legacy Ornamental Mills
Sent: Aug 7, 2017 12:47 PM
To: Legacy Ornamental Mills
Subject: making a tap for the 5/8-4 acme thread

starting a dedicated topic for this as I think it warrants it...got an email from a tool supplier that services the metal working industry in regards to obtaining a factory made, 5/8-4 acme thread, right hand tap...it would have to be made to order...here is the quote...

5/8-4 acme tap, I am quoting you a 4pc set (semi rougher, rougher, semi finisher, finisher) $717.00

5-7 days TO MANUFACTURE

8” OVERALL LENGTH

3” THREAD LENGTH 

This is a “No guarantee no return”

Victor Machinery Exchange

33-53 62nd Street

Woodside, NY 11377

Phone: 718-899-1502

Fax: 718-899-0556

www.victornet.com

now, this quote was for a 4 pc. set, which they took it upon themselves to quote...we only need 1 tap, and I am sure that you could order just the one tap that is needed, but I would think that it would come at a premium price...my guess that it would be about $300.00 for the one tap...certainly not what I would want to spend, so we  decided to make the tap from some leftover acme rod we had(see photos attached)...we made a four flute tap with the end a bit longer...the end matches the diameter of the hole you would need to pre-drill into the delrin or nylon, before you begin to use the tap...the idea being that the tap would have a better chance of going straight through the material being used...did a test on some white delrin and it worked very well...the test piece easily threads onto the lead screw, with little to no play...took about 1 1/2 hrs. to make...thinking about making a few split nuts and then putting the tap away for future generations to use...LOL!...more to follow...joe b.

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