Products for bench top machinists | LittleMachineShop.com

Chuck Adapter, 1"-8 Thread 4" Diameter

Chuck Adapter, 1"-8 Thread 4" Diameter - Main image
$23.42 $34.95 In stock

See LittleMachineShop.com PN 1916 for a 4" diameter adapter pre-drilled for a 3-jaw chuck.

* 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.

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Grace ★★★★★

I machined this adapter for my lathe following the included instructions, and it fits perfectly with my 3-jaw chuck. The pre-drilled pattern saved me a lot of setup time, and the 1"-8 thread engaged smoothly.

Hannah ★★★★★

The 4-inch diameter gave me plenty of room to work, and the pre-drilled pattern for a 3-jaw chuck saved me some layout time on the lathe.

Steven N. ★★★★★

The instructions were clear and the pre-drilled holes for the 3-jaw chuck saved me a lot of setup time. Machining it to fit my spindle was straightforward with the included guide. It’s a solid, well-made adapter for the price.