Chuck Adapter, M39 x 4 Thread 4" Diameter
- Cast iron lathe chuck backplate adapter fits lathes with M39 x 4 spindle nose thread
- Adapter is 4" (100 mm) in diameter and has no chuck mounting holes
- For all 3" chucks and 4" chucks
- Includes instructions for final turning of the registration diameter to ensure concentricity
Weight: 2.40 lb
Use this adapter to mount 4" chucks such as LittleMachineShop.com PN 1698 4" 3-Jaw chuck or PN 1588 4" 4-Jaw chuck.
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 ensure 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.
|Outside Diameter||Ø 3.9" (100 mm)|
|Hub Diameter||Ø 2.2" (56 mm)|
|Hub Length||Ø 0.9" (24 mm)|
|Flange Thickness||Ø 0.6" (16 mm)|
|Registration Boss||Ø 0.1" (3 mm)|
|Registration Diameter||Ø 2.8" (72 mm)|