Rotary broaching for lathe and mill
- I found this link to a commercial company demonstrating rotary broaching on the lathe and mill. An image is better than a thousand words to see how it works, see:
I like that. Can't tell you how many times I mess up on one side or the other when fabricating a hex bolt by indexing. Twould be kind of neat to have a tool bit that puts a perfect 9/16 or 1/4 inch hex head on a rod (potential new bolt) with just one downstroke.
It is possible to do rotary broaching on both the lathe and mill with very simple equipment,see:
I have used these methods successfully to make hexagon holes in steel aluminium and plastics.