Chuck Adapter, M39 x 4 Thread 6" Diameter

Name: Chuck Adapter, M39 x 4 Thread 6" Diameter
Brand: ABS Import Tools Inc.
SKU: 1922
Price: 53.04 USD
Availability: InStock
Rating: 4.6 (5 reviews)

Chuck Adapter, M39 x 4 Thread 6" Diameter - Main image

$53.04 ~~$86.95~~ In stock

This chuck adapter fits 9x20 lathes that have a M39x4 spindle nose thread. There are no holes in this adapter so you can drill it for either a 3-jaw or 4-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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Customer Reviews (4.6 / 5 · 5 reviews)

Ruby ★★★★★ Oct 22, 2026

The M39x4 threads lined up perfectly on my 9x20 lathe spindle, and the solid 6-inch diameter gives me a nice stable platform. Having no pre-drilled holes was exactly what I needed so I could customize the bolt pattern for my specific 4-jaw chuck.

Leo E. ★★★★★ Oct 20, 2026

The threading matched my 9x20 lathe spindle perfectly, with no wobble at all. I appreciate that it's blank so I can drill the hole pattern exactly where I need it for my 4-jaw chuck.

Jacob ★★★★★ Oct 19, 2026

This 6-inch diameter chuck adapter fit perfectly on my 9x20 lathe's spindle without any wobble. The clean finish left no burs, and it was easy to drill exactly where I needed for my 4-jaw chuck.