Today we’re getting back to the diamond grinder. Sort of. We’re making a tool that we’ll need when we get back to the diamond grinder: a single-point broach for CNC shaping the keyway in the hub.
This is the same technique I use to make simple HSS boring bars for the lathe, and it works well.
Tools and parts used in this video:
- YG-1 4-Flute Carbide 1/4″ end mill (eBay*): https://goo.gl/1dLomn
- YG-1 1/4″ 120 degree spotting drill (eBay*): https://goo.gl/6zqTzb
*These are affiliate links. When you click one of these links and make a purchase, it helps to support projects like this one.