LittleMachineShop.com Lathe Chuck, 4-Jaw 4" with Adapter (1697)
This 4" 4-Jaw independent chuck includes an adapter to fit the mini lathe spindle. It includes a chuck key and reversible jaws.
The adapter mounts to the spindle with three studs so additional holes in the spindle are not required.
This chuck has a 0.98" (25 mm) through hole. The chuck can hold work up to 3.94" (100 mm) in diameter.