I need to be able to keep my parts perfectly vertical, and also have control over how hard the parts pressed on the polishing pad. I made a guide using 4 hardened stainless posts with linear bearings. A dial indicator measures the polish depth, and counterweights in the rear control the pressure.
This circular cut was made on the mill using a rotary table.
The accuracy of the rotary table cut approaches that of a lathe. Here a lathe cut part fits inside with about 0.002" clearance.
The outside diameters and the dovetails were cut on the lathe. Then I cut the upper disc into the pie shaped pieces using a bandsaw, and then I milled the saw cut edges smooth.
I needed a way to hold an optical fiber connector, known as an MT connector, very accurately, and with no free play. The MT's measure 3mm high x 6 mm wide. Here is one in a rectangular hole I made with tolerances of 0.1mm
I began by milling a slot slightly smaller than the MT's dimensions. Then I drove a rectangular punch I made from a hardened steel bolt into the slot. Even though my method was crude - I drove the punch in with a ball pein hammer - I had good repeatability from one part to the next.