I am very happy with my PM ER40 collet chuck with D1-5 backplate. It is a great fit on my G0709 lathe, and I was able to tap it in until the needle barely moves on my tenths indicator on the taper. The screw threads are smooth.
However, I don't have a spindle lock, and tightening the collet nut is a pain, even if I put the lathe in a low gear. The best I could do was to use the camlok wrench to hold the spindle nose while tightening the nut, and I didn't like doing that. The collet has 3 evenly-spaced 8mm holes in the top, centered 11mm out from the backplate, so I now have a 3D-printed wrench that seems to be working well. I used a bit of 8mm linear rod scrap as a locating pin but if I didn't have that could of course have turned down a piece of steel instead; I have a lathe after all! ☺
Pictures and more story in my build thread at
forum.makerforums.info
Files including realthunder FreeCAD files at:
gitlab.com
If this breaks, I'll probably use my horizontal table to make an aluminum wrench instead, but sometimes 3D-printed pieces are stronger than you expect; after years I'm still using my old "prototype" vice speed handle at my mill so this might last for a while. We'll see!
However, I don't have a spindle lock, and tightening the collet nut is a pain, even if I put the lathe in a low gear. The best I could do was to use the camlok wrench to hold the spindle nose while tightening the nut, and I didn't like doing that. The collet has 3 evenly-spaced 8mm holes in the top, centered 11mm out from the backplate, so I now have a 3D-printed wrench that seems to be working well. I used a bit of 8mm linear rod scrap as a locating pin but if I didn't have that could of course have turned down a piece of steel instead; I have a lathe after all! ☺
Pictures and more story in my build thread at
ER40 collet back wrench
I recently bought an ER40 collet for my lathe. It came with the right wrench for tightening the nut, but I have no spindle lock, so tightening it is difficult. But the ER40 chuck has three 8mm holes clearly meant for holding it in place. And I have plenty of spare bits of 8mm linear guide rod to...
forum.makerforums.info
Files including realthunder FreeCAD files at:
Michael K Johnson / Collet Chuck Wrench · GitLab
Collet Wrench for Precision Matthews ER40 lathe collet
gitlab.com
If this breaks, I'll probably use my horizontal table to make an aluminum wrench instead, but sometimes 3D-printed pieces are stronger than you expect; after years I'm still using my old "prototype" vice speed handle at my mill so this might last for a while. We'll see!
