some day I'll learn to quit gambling on "mystery tools" - this is an e-bay purchase, a "metric" facemill, it was called. Diameter is 4 inches, or 100 mm (I'll believe the 100 mm, you will see why in a sec). It takes 3 carbide trapazoid cutters, and is beautifully built out of a silvery metal (satin chrome?). On the part that would mate with a face mill holder, it says: WKH PDM 0/ 100/3 (where the 0/ represents a zero with a slash through it) DIN 138
There are no other markings. The hole that would mate with the arbor center post is 26.88 mm or 1.05 inches (measured with a mitutoyo digital caliper), the driving slots are .4915 inches/12.49 mm
So, here are some questions for you folks who know things
- manufacturer? anyone recognize WKH??
- is this actually designed to mount on a 1 inch face mill holder (If I had a 1 inch facemill holder I could figure that out easily, but I don't).