Shaft VI, Worm Wheel

Installed this on my Sieg SC4 and the fit was perfect — no filing or adjustments needed to get the worm mesh right. My lathe is running quieter now with less backlash in the drive train.

The threads on this worm wheel are cut cleanly, and it seated onto the shaft without any filing or forcing. I had to shim the housing slightly on my SC4 to get the backlash right, but once dialed in it runs smooth and quiet.

The hardened worm gear teeth meshed with my existing lead screw smoothly right out of the box, and it took me under 20 minutes to swap the old part. I was worried about alignment, but the shaft slots fit perfectly into the bearings.