Lathe Chuck, 4-Jaw 4", Independent

- 4-Jaw Lathe Chuck
- 4" (100 mm) diameter
- Each jaw is independently adjustable and reversible
- Plain back mounting
- High quality steel, hardened and ground
This 4 inch 4-jaw chuck requires an adapter for the mini lathe, but it fits the standard backplate for 9x20 lathes (with the addition of three more bolt holes).
It includes a chuck key.
This chuck has a 0.98" (25 mm) through hole. The chuck can hold work up to 3.94" (100 mm) in diameter.

Mount this chuck on a mini lathe with one of our chuck adapters. Or purchase a chuck with an adapter already mounted.
Here are instructions for centering work in a 4-jaw chuck. It's easy if you follow this procedure.
Here is a chart that provides lathe chuck capacities and mounting dimensions.
Rated Capacity, Inside Jaws | 0.24" - 1.77" (6.0 mm - 45.0 mm) |
Rated Capacity, Outside Jaws | 1.57" - 3.94" (40.0 mm - 100.0 mm) |
Practical Maximum Capacity, Inside Jaws | 2.75" (69.8 mm) |
Practical Maximum Capacity, Outside Jaws | 5.00" (127.0 mm) |
Diameter, Overall | 3.94" (100.0 mm) |
Registration Recess Diameter | 2.83" (72.0 mm) |
Registration Recess Depth | 0.14" (3.5 mm) |
Bolt Circle Diameter | 3.31" (84.0 mm) |
Center Hole Diameter | 0.98" (25.0 mm) |
Height | 2.13" (54.0 mm) |
Jaw Height Above Face | 0.83" (21.0 mm) |
Height with Jaws | 2.56" (65.0 mm) |
Number and Size of Bolts | 4 M8 |
Chuck Key | 0.24" (6.0 mm) |
Chuck Designation | K72-100 |
Compatibility
This product works with these LittleMachineShop.com products:
- 1692 Adapter, 4" Lathe Chuck
- 1791 Chuck Adapter, 1"-10 Thread 4" Diameter
- 1790 Chuck Adapter, 1"-8 Thread 4" Diameter
- 1792 Chuck Adapter, 1-1/2"-8 Thread 4" Diameter
- 1921 Chuck Adapter, M39 x 4 Thread 4" Diameter
- 2335 Chuck Adapter, Unthreaded 4" Diameter
This product works with lathes with a 100 mm flange chuck mount including:
- Northern Tool 49656 KLUTCH 7x12 Mini Lathe
- Big Dog BD-0618Ax300 7x14 Mini Lathe
- Big Dog BD-0618x300 7x14 Mini Lathe
- LittleMachineShop.com 7450 HiTorque 7x16 Mini Lathe
- LittleMachineShop.com 5200 HiTorque 7x16 Mini Lathe
- LittleMachineShop.com 7350 HiTorque 7x16 Mini Lathe
- LittleMachineShop.com 5100 HiTorque 7x16 Mini Lathe
- MX-8x14 Preenex (and others) 8x14 Lathe
- Harbor Freight 44859 Central Machinery 8x12 Precision Mini Lathe
- Grizzly G0768 8x16 Benchtop Lathe
- LittleMachineShop.com 3536 HiTorque 8.5x16 Bench Lathe
- SIEG SC4 8.5x16 Bench Lathe
- SIEG C4 8.5x16 Bench Lathe
- Travers Tools OT218410 OTMT 8x16 Bench Lathe
- LittleMachineShop.com 3540 HiTorque 8.5x20 Bench Lathe
- LittleMachineShop.com 3595 HiTorque 8.5x20 Deluxe Bench Lathe
- LittleMachineShop.com 7500 HiTorque 8.5x20 Bench Lathe
- LittleMachineShop.com 7550 HiTorque 8.5x20 Deluxe Bench Lathe