Spin Jig, 5C Precision Indexing

Swapped out my old indexing plate for this one and immediately noticed the difference in repeatability. The 0.0004 TIR spindle accuracy is no joke—my test cuts are coming out exactly where I dialed them.

Set this up on my mill today and the indexing plate is dead flat, way better than my old setup. The spindle holds repeatability within tenths which is exactly what I needed for a gear-cutting job.

The 0.0004 TIR on the spindle is the real deal — I checked it with a tenths indicator and it's dead on. Indexing plate clicks into each position with no slop. This thing holds tolerance way better than the jig it replaced.