Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-07 Thread Gene Heskett
On Wednesday 07 March 2018 11:38:41 andy pugh wrote: > On 7 March 2018 at 14:55, Gene Heskett wrote: > > Price is scary, and still leaves the collet free to slip. I think > > I'd rather sacrifice an R8 by grinding a key slot into it for a cap > > screw in the side of a

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-07 Thread andy pugh
On 7 March 2018 at 14:55, Gene Heskett wrote: > Price is scary, and still leaves the collet free to slip. I think I'd > rather sacrifice an R8 by grinding a key slot into it for a cap screw in > the side of a brass tap holder, Or just make a complete R8. Here is a 3D

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-07 Thread Gene Heskett
On Wednesday 07 March 2018 06:42:26 andy pugh wrote: > On 7 March 2018 at 04:05, Gene Heskett wrote: > > So the only way is to buy R8's with square bores, > > I don't think that is the only way at all. > > You could make solid ER32 "collets" with grub screws in the end. >

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-07 Thread andy pugh
On 7 March 2018 at 04:05, Gene Heskett wrote: > So the only way is to buy R8's with square bores, I don't think that is the only way at all. You could make solid ER32 "collets" with grub screws in the end. (getting the extractor flange right would be a challenge). Bored

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-07 Thread Gene Heskett
On Wednesday 07 March 2018 02:38:37 Marcus Bowman wrote: > On 7 Mar 2018, at 06:28, Erik Christiansen wrote: > > On 07.03.18 00:58, Gene Heskett wrote: > >> And the grub screws stayed tight? > > I made a whole tapping system for my pillar tool, for small taps, > using the 4-grubscrew technique,

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-06 Thread Marcus Bowman
On 7 Mar 2018, at 06:28, Erik Christiansen wrote: > On 07.03.18 00:58, Gene Heskett wrote: >> And the grub screws stayed tight? > I made a whole tapping system for my pillar tool, for small taps, using the 4-grubscrew technique, and I have used it successfully for years. I only use it for

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-06 Thread Erik Christiansen
On 07.03.18 00:58, Gene Heskett wrote: > And the grub screws stayed tight? Yup, but that was only hand tapping. A bit of Loctite would be good insurance when rigid tapping. > The die holder I'd have to make as all mine are handled for 2 handed > use. The die holder was only needed because I

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-06 Thread Gene Heskett
On Wednesday 07 March 2018 00:29:43 Erik Christiansen wrote: > On 06.03.18 23:05, Gene Heskett wrote: > > It appears that its well nigh impossible to get a firm enough grip > > on a tap shank, and on the smooth, unkeyed TTS ER-32 holder, to > > reliably lock a tap for rigid tapping. I've

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-06 Thread Gene Heskett
On Wednesday 07 March 2018 00:00:13 jeremy youngs wrote: > Snip > You might try an er 20 all I have ever used to rigid tap. They were > also in cat 40 and 50 taper holders , tightened with wrench on bench > so that maybe a thing. I have tapped up to 1/1/2 inch with er 20 sets. I think that calls

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-06 Thread Gene Heskett
On Tuesday 06 March 2018 23:31:20 Jon Elson wrote: > On 03/06/2018 10:05 PM, Gene Heskett wrote: > > Greetings all; > > > > It appears that its well nigh impossible to get a firm enough grip > > on a tap shank, and on the smooth, unkeyed TTS ER-32 holder, to > > reliably lock a tap for rigid

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-06 Thread Erik Christiansen
On 06.03.18 23:05, Gene Heskett wrote: > It appears that its well nigh impossible to get a firm enough grip on a > tap shank, and on the smooth, unkeyed TTS ER-32 holder, to reliably lock > a tap for rigid tapping. I've considered buying ER-32's with square > sockets, but for >8mm taps, the

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-06 Thread jeremy youngs
Snip You might try an er 20 all I have ever used to rigid tap. They were also in cat 40 and 50 taper holders , tightened with wrench on bench so that maybe a thing. I have tapped up to 1/1/2 inch with er 20 sets. -- Check

Re: [Emc-users] Where are you getting R8 square collets for driving taps?

2018-03-06 Thread Jon Elson
On 03/06/2018 10:05 PM, Gene Heskett wrote: Greetings all; It appears that its well nigh impossible to get a firm enough grip on a tap shank, and on the smooth, unkeyed TTS ER-32 holder, to reliably lock a tap for rigid tapping. I've considered buying ER-32's with square sockets, but for >8mm