- Joined
- Nov 28, 2016
- Messages
- 2,368
I had decided to put an ER32 collet chuck on my old Hendey lathe. I picked up an 80mm chinesium chuck and a set of chinese ER32 collets off e-bay.
I didn't have much confidence in the cheap chinese collets to accurately center from one collet to another, so I decided to machine a 'set-tru' type of backplate.
The 4 set screws around the outside diameter are used to center the work. It can be moved up to .010 off center.
Sure enough... the collets won't accurately hold center... I centered a .500 gage pin within about .0002", then swapped over to a .375 collet and pin. It was running out about .004"... in less than a minute, I had it centered to about .0003".
I think this will work out pretty good... but only time will tell...
-Bear
I didn't have much confidence in the cheap chinese collets to accurately center from one collet to another, so I decided to machine a 'set-tru' type of backplate.
The 4 set screws around the outside diameter are used to center the work. It can be moved up to .010 off center.
Sure enough... the collets won't accurately hold center... I centered a .500 gage pin within about .0002", then swapped over to a .375 collet and pin. It was running out about .004"... in less than a minute, I had it centered to about .0003".
I think this will work out pretty good... but only time will tell...
-Bear