Lathe Accessories

by Todd Ferrante <back to homepage>
 
 
This is a rear mounted parting tool holder I made.  I needed it when making my drilling tailstock lever extension.  On my lathe, the distance from the cross slide to the spindle center is 1.232".  One important feature is not visable.  It is important to make a rectangular pocket on the bottom of the holder around the clamping screw.  If the hold down force is distributed around the perimeter of the post, you get less chattering during parting.
This indicator mounting block uses the split collet clamping design described on the Mill Tooling page.  It is a simple block with a .375" clamped hole, and a single #10 screw for mounting to a T-slot on the lathe or mill.  Here I've mounted a test indicator to the cross slide for measuring runout along a shaft mounted between centers.
The piece of work being measured above is the shaft clamped in the mount block in this picture.  It is .375" on the end, and 12mm (.472") along the length.  Magnetic indicator mounts use this 12mm shaft, but there aren't many places to stick a magnetic base on the Taig lathe and mill.  With this adapter shaft, I can put an indicator on the cross slide.  I can also mount it similarly to the top of the headstock to check runout on large parts.
By mounting on the front of the headstock, I can indicate the travel of the carriage itself.
I wanted to turn the adapter shaft between centers.  I made a quickey center out of 1/2" drill rod gripped in the three jaw chuck.  I made a quickey lathe dog from a couple strips of AL 6061-T6 and three SHCSs.  I didn't bother to notch the inside of the dog jaws for better gripping, but it still worked fine.