Bearing, 6903-2RS

Installed this 6903-2RS on my SC4 lathe and it fit snug with no play at all. The rubber seals keep the dust out nicely, which matters when you’re cutting brass.

The exact 17x30x7 dimensions meant zero fiddling to get it seated in the pulley housing, and the rubber seals keep the grease right where it belongs. My SC4 spindle runs quieter now than it has in months, so this little bearing did its job perfectly.

Finally got the SC4 back up and running after replacing this bearing; the 17mm ID fit the shaft perfectly with zero play. Took about 20 minutes to swap out, and now the spindle runs smooth and quiet again.