As a Tormach owner I may be able to shed a little light on their TTS holders: Tormach have only made ATC compatible holders (with groove for the gripper) for at least 3 years. I have used some of the thinner TTS adapter rings and found them unsatisfactory. It was difficult to ensure that the rings were perpendicular to the shaft plus the supplied epoxy was weak. The current shrink fit TTS rings that Gregg mentioned work well but are expensive at us$17.50 + shipping. Another approach is to use shaft collars (https://www.amazon.com/Single-Split-Shaft-Collar-Black/dp/B01MEENEFV for one source). With the collars you will need to turn/mill away some material adjacent to the shank to provide clearance for the nose of the R8 collet used to retain the TTS holder.
> -----Original Message----- > From: Gregg Eshelman via Emc-users [mailto:emc- > us...@lists.sourceforge.net] > Sent: Thursday, May 10, 2018 5:25 PM > To: Enhanced Machine Controller (EMC) > Cc: Gregg Eshelman > Subject: Re: [Emc-users] More on er-20 stuffs > > To use those with a TTS or other 3/4" R8 (or 4C) collet you'll need adapter > rings. Like these. > > https://www.tormach.com/store/index.php?app=ecom&ns=prodshow&ref=3 > 2432 > They used to have thinner ones that had to be glued on with epoxy. Looks like > they're going (or already have gone) to making only the ATC compatible TTS > tooling. > > Since you have a CNC lathe it shouldn't be difficult to make your own rings, > any dimensions you need to work on the mill. > > Some quick searching turned up nothing of collets with D shaped holes. Take a > standard 3/4" R8 and have a couple of holes EDM cut so you can pin a piece of > steel inside? > > On Thursday, May 10, 2018, 5:26:34 AM MDT, Gene Heskett > <ghesk...@shentel.net> wrote: > Greetings; > > Looking around for some more cheap metric ER-20 stuff, I stumbled over a kit > on ebay that had the TTS like adapter as part of the kit. So I bought 2 sets of > them. $40 a copy, or $79.something for 2 sets. > > The adapter looked like it was the std 3/4 diameter stem. But when they > arrived, the 3/4" diameter stem had a full length flat, like it was intended to > be used in a spindle with a 3/4" bore and set screws. > > This would, if a 3/4" R8 collet could be found with a D shaped bore, be yet > another way to remove one potential slip point in trying to hold a tap for rigid > tapping. > > The url if it still exists, and if you look close, that flat on the shank can be seen, > is: > > <https://rover.ebay.com/rover/0/e11400.m43.l9264/7?euid=7c62a50e81934 > 9c08674ae7428756b5f&bu=44688966138&loc=https%3A%2F%2Fwww.ebay.c > om%2Fsignin%2Fg%2Fv%255E1.1%2523i%255E1%2523I%255E3%2523f%255 > E0%2523p%255E3%2523r%255E1%2523t%255EUl4xMF83OjNDMjBBMzE5OT > c4RTI1QjVBQzJBMEI0MTZERDFBNUJGXzJfMSNFXjI2MA%253D%253D&sojTags > =bu=bu> > > Has anyone else seen such a R8 critter, and what would it be called so it can > be found in the throngs of such stuff from the asian's? > > ---------------------------------------------------------------------------- -- > Check out the vibrant tech community on one of the world's most engaging > tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
