CXA toolholder dovetail dimensions - Printable Version +- MetalworkingFun Forum (http://www.metalworkingfun.com) +-- Forum: Machinery (http://www.metalworkingfun.com/forum-10.html) +--- Forum: Lathes (http://www.metalworkingfun.com/forum-11.html) +---- Forum: Lathe Tooling (http://www.metalworkingfun.com/forum-19.html) +---- Thread: CXA toolholder dovetail dimensions (/thread-3833.html) |
CXA toolholder dovetail dimensions - SteveG - 02-12-2018 I'm looking at making a basic QCTP, either using Greg's design from here, or a Jon Stephenson style. I've got a 14" lathe so intend to go with the CXA size toolpost and would like to use the "standard" dovetail dimensions for compatibility in case I ever get a real toolpost. Does anyone happen to have accurate dimensions for a CXA toolholder dovetail. I thought I had found and saved some previously but can't seem to track them down. I can find dimensions online for other sizes, but not CXA. Steve RE: CXA toolholder dovetail dimensions - f350ca - 02-12-2018 This store site seams to list them Steve. https://www.accusizetools.com/quick-change-tool-posts/ Smart move, when I built mine it never crossed my mind to make them to a standard. Guess all the really high end stuff is proprietary. Thats my story and Im sticking to it. RE: CXA toolholder dovetail dimensions - SteveG - 02-12-2018 (02-12-2018, 10:19 PM)f350ca Wrote: This store site seams to list them Steve. Awesome - thanks Greg. Plenty of sites have the post dimensions and all the toolholder dimension EXCEPT the dovetail. LOL - yeah, after having high quality custom made tooling I'm sure you'll never come back to standard commercial stuff ;) You've been using yours for a long time now. Anything you'd change/improve? Steve RE: CXA toolholder dovetail dimensions - f350ca - 02-13-2018 Its stood up amazingly well Steve. I lucked into a really hard piece of mystery metal when I made the body. Was a bugger to work with but worth the effort. To do it again I'd spend the money on a chunk of 4140 heat treated or similar to get the hardness again. Only complaint is you have to really synch it down or it will rotate on the compound under a hard cut. Thats with the bottom relieved so that only a small ring touches on the outside edge. Same with the cam that pushes the locking pins. Mind you the pins are brass and they still work. RE: CXA toolholder dovetail dimensions - SteveG - 02-13-2018 Thanks Greg. I'll keep a lookout for some decent material to make it from. Think I know where there's some mystery shafting that might fit the bill. Had a couple of dovetail cutters turn up yesterday, so slowly gathering what I need. I got lucky and picked up a couple of free scrap forklift tynes a couple of weeks ago - so should have plenty of material for the holders. Steve RE: CXA toolholder dovetail dimensions - Mayhem - 02-13-2018 (02-13-2018, 09:13 AM)f350ca Wrote: ...Only complaint is you have to really synch it down or it will rotate on the compound under a hard cut... Have you tried adding a thrust bearing under the nut? RE: CXA toolholder dovetail dimensions - f350ca - 02-13-2018 (02-13-2018, 06:06 PM)Mayhem Wrote:(02-13-2018, 09:13 AM)f350ca Wrote: ...Only complaint is you have to really synch it down or it will rotate on the compound under a hard cut... Not a proper bearing, using a bronze washer. That might help. Or a longer handle. The CA Dorian on the Summit uses a 1 3/8 wrench so lots of torque |