Re: [Emc-users] makeing tap hats, from brass rod

2018-05-20 Thread andy pugh
On 20 May 2018 at 15:26, Gene Heskett wrote: >> https://www.ebay.com/itm/131375282525 > > That looks a lot like an engraving bit, same as I use for making PCB's, No, not at all. Engraving bits have the tip off to one side. -- atp "A motorcycle is a bicycle with a

Re: [Emc-users] makeing tap hats, from brass rod

2018-05-20 Thread Gene Heskett
On Sunday 20 May 2018 10:17:27 andy pugh wrote: > On 20 May 2018 at 02:41, Gene Heskett wrote: > > Good idea but the drill bit doesn't seem to want to self center, > > Spotting drills work better than centre drills if you are not actually > making a centre hole for a lathe

Re: [Emc-users] makeing tap hats, from brass rod

2018-05-20 Thread Gene Heskett
On Sunday 20 May 2018 09:57:29 Erik Christiansen wrote: > On 19.05.18 21:41, Gene Heskett wrote: > > I have all these brass slugs fixed so they are keyed into a scallop > > in the edge of a 7/8" R8 collet that fits the head of a 4mm capscrew > > in the lower end of the slug. So the next operation

Re: [Emc-users] makeing tap hats, from brass rod

2018-05-20 Thread andy pugh
On 20 May 2018 at 02:41, Gene Heskett wrote: > Good idea but the drill bit doesn't seem to want to self center, Spotting drills work better than centre drills if you are not actually making a centre hole for a lathe to use. https://www.ebay.com/itm/131375282525 -- atp

Re: [Emc-users] makeing tap hats, from brass rod

2018-05-20 Thread Erik Christiansen
On 19.05.18 21:41, Gene Heskett wrote: > I have all these brass slugs fixed so they are keyed into a scallop in > the edge of a 7/8" R8 collet that fits the head of a 4mm capscrew in the > lower end of the slug. So the next operation is to set it into the > spindle, and position it so the

Re: [Emc-users] makeing tap hats, from brass rod

2018-05-19 Thread Gene Heskett
On Saturday 19 May 2018 22:03:58 andy pugh wrote: > On 20 May 2018 at 02:41, Gene Heskett wrote: > > But how best to prevent the drill bit from doing the sailors > > hornpipe dance when the brass first touches it? Thats the $64 > > question. > > I would take a completely

Re: [Emc-users] makeing tap hats, from brass rod

2018-05-19 Thread andy pugh
On 20 May 2018 at 02:41, Gene Heskett wrote: > But how best to prevent the drill bit from doing the sailors hornpipe > dance when the brass first touches it? Thats the $64 question. I would take a completely different approach, I would make a fitting for the lathe spindle