Chuck Adapter, Unthreaded 4" Diameter

- Cast Iron Adapter Can Be Threaded to Fit Any Spindle Nose Thread
- 3/8" Smooth Pilot Hole
- 4" (100 mm) in Diameter and Has No Chuck Mounting Holes
- Use It for All 3" and 4" Chucks
- 55 mm Diameter Hub
Cast iron lathe chuck adapter can be threaded to fit any spindle nose thread. It has a 3/8" smooth pilot hole. This adapter is 4" (100 mm) in diameter and has no chuck mounting holes. Use it for all 3" and 4" chucks.
*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.
Nominal Size | 4" |
Outside Diameter | Ø 3.9" (100 mm) |
Thread | 10 mm Smooth Bore |
Bolt Holes | None |
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) |
Compatibility
This product works with these LittleMachineShop.com products: