عجلة دودية

The tooth profile matches the original perfectly—it dropped right onto the SC4 spindle without any shimming. Machining a mild steel shaft this morning and the backlash feels tighter than the factory part ever did.

After my old one finally wore out, this replacement dropped right in without any filing or fuss—the bore alignment was spot-on for the SC4’s spindle. It’s been running quiet and smooth through a few dozen threading passes, which is exactly what I needed.

The teeth mesh perfectly with my SC4’s lead screw—no play at all, and it seated without needing any filing. Exactly the right replacement, and it’s held up through a solid week of threading work.