Products for bench top machinists | LittleMachineShop.com

Adapter, 4" Spindle to 6" Lathe Chuck (3 Hole)

Adapter, 4" Spindle to 6" Lathe Chuck (3 Hole) - Main image
$19.17 $29.95 In stock

This adapter mounts a 6" 3-jaw lathe chuck with a 130 mm registration recess on a flange for a 4" chuck with a 72 mm registration boss. It works on 8x12 and 8x14 lathes as well as the Harbor Freight 5980 multipurpose machine. It also fits the SIEG C4 and SC4 lathes.

*NOTE: If using with any of our 6" 4-jaw chucks (2038, 6547) additional mounting holes will need to be drilled. Use M8 transfer screws to mark holes for the 2038 chuck.

* Note Don't forget to purchase the appropriate set of Studs & Nuts to accommodate changes in chuck or adapter configurations. 

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Customer Reviews (4.8 / 5 · 5 reviews)

Charlotte M. ★★★★★

Installed this on my 8x14 and the 72 mm boss seated perfectly with zero wobble. The chuck now runs true at higher speeds, and the three-hole pattern lined up without any filing.

Robert ★★★★★

The 130 mm registration recess lined up perfectly with my 6" chuck, and the 72 mm boss seated without any wobble on the spindle. I had it snugged down and running true in under ten minutes, which is more than I can say for other adapters I've wrestled with.

Matthew ★★★★★

Was a bit nervous about fitment on my 8x14 lathe, but the 130mm registration recess lined up perfectly with the chuck. Once mounted, the adapter feels solid with no wobble during cuts.