Chuck Adapter, M39 x 4 Thread 6" Diameter
- Cast iron lathe chuck backplate adapter fits lathes with M39 x 4 spindle nose thread
- Adapter is 6" (160 mm) in diameter and has no chuck mounting holes
- For all 5" and 6" chucks
- Includes instructions for final turning of the registration diameter to insure concentricity
There are no holes in this adapter so you can drill it for either a 3-jaw or 4-jaw chuck.
*NOTE* These adapters require machining on the lathe on which they will be used.
Instructions are included for final turning of the registration diameter on your lathe to insure perfect concentricity.
WOODWORKERS: Our threaded adapters are not suitable for use on wood turning lathes. Please do not purchase them for this application. These adapters require machining on the lathe on which they will be used, and this is impossible on a wood lathe.