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The part number matched the SC4 diagram exactly, and the drive lever shaft's machining was precise enough that it seated without any binding. A perfect fit for the bench lathe rebuild.

Fit perfectly as the replacement part for my SC4 lathe's drive lever shaft. The positioning disk had clean, precise edges and slid right into place without any filing needed.

Machined cleanly with no burrs on the edges, this disk dropped right onto the shaft without any forcing. I used it to restore the lever action on my SC4 lathe, and the fit is snug enough that there’s zero wobble during operation.