ترس، محرك السرج، مخارط طاولة

The fit is spot-on for the SC4’s part 263 slot—no wobble or filing needed to seat it. Took about ten minutes to swap out and now the carriage glides along the bed without that grinding catch it had before.

Finally got my SC4 carriage moving smoothly again after replacing this gear — the tooth profile matches the original exactly. Took about 20 minutes to swap out, and now the feed is consistent across the whole bed.

Fit my SC4 carriage perfectly right out of the box, no filing or shimming needed. Part 263 slid onto the shaft and the teeth mesh cleanly with the drive gear now, so the carriage moves smoothly again.