Dick Streff
Aluminum
- Joined
- Sep 12, 2003
- Location
- Omaha
I recently got a band saw with a broken trunnion. I know how I'm going to go about repairing it but it got me thinking while I was looking it over how the heck did they machine it in the first place.
Here are some photos of the piece in question:
Side view
Opposite side view.
A semi-circular groove isn't any trick, but I can't wrap my head around how they would have machined those ways inside that 2 3/4" space. I'd be surprised if they had made any one off machinery just for the purpose. And by looking at the bottoms of the semi-circular grooves it doesn't to appear to have been done by any endmill type cutter. Is there some kind of broaching process for cuts like this?
Just curious,
Dick
Here are some photos of the piece in question:
Side view
Opposite side view.
A semi-circular groove isn't any trick, but I can't wrap my head around how they would have machined those ways inside that 2 3/4" space. I'd be surprised if they had made any one off machinery just for the purpose. And by looking at the bottoms of the semi-circular grooves it doesn't to appear to have been done by any endmill type cutter. Is there some kind of broaching process for cuts like this?
Just curious,
Dick