Collet chuck for CNC lathe

by John

IMG_1953

I made this ER32 collet chuck for my Boxford CNC lathe. Actually I made 2 chucks, but the first one had 0.03mm runout, so I made this second one more carefully, and it has no measureable runout at all, at the chuck or 50mm out from the face. The material is stainless steel, so it was difficult to drill the holes and tap the threads, and I used a few tungsten carbide inserts. I am very happy with the end result. Thanks to Stuart T for the design.

I made this ER32 collet chuck for my Boxford CNC lathe. Actually I made 2 chucks, but the first one had 0.03mm runout, so I made this second one more carefully, and it has no measureable runout at all, at the chuck or 50mm out from the face.
The material is stainless steel, so it was difficult to drill the holes and tap the threads, and I used a few tungsten carbide inserts. I am very happy with the end result.
Thanks to Stuart T for the design.