قاعدة مركبة سفلية، مخرطة صغيرة، مثقوبة ومفروزة، 20 TPI

Installed this on my mini lathe last night and the 20 TPI threads meshed perfectly with the leadscrew—no slop at all. The advancement per revolution is exactly 0.050" as stated, making precise cuts much easier to dial in.

The threads are cut clean and true, so the compound slides smoothly with zero play once mounted. I swapped out the old worn part on my 4200 and it fits perfectly, advancing exactly 0.050" per turn as advertised.

The threads on this bottom rest are cut clean and mesh perfectly with my mini lathe’s compound—advancing exactly 0.050" per turn just as described. The drilled and milled surfaces fit snug without any wobble. Took a bit of wiggling to seat it, but once in, it’s rock solid.