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I was a bit nervous about getting the right replacement part, but this sleeve matched the SC4-264 part number exactly. The machining on the gear shaft sleeve is clean and precise, so it slid into place without any filing or adjustment needed. My bench lathe is running smoothly again.

The sleeve fit perfectly on my SC4's gear shaft, and the machining is precise enough that I didn't have to file anything down. It's definitely a solid replacement for the original part.

Installed this on my SC4 lathe and it fit perfectly with zero wobble. The keyway alignment was spot on, saving me from having to file anything down for a change.