Another dumb question...
Posted: Sun Apr 26, 2020 11:45 am
I bought a Grizzly milling machine about 10 years ago and now that I'm retired, I finally have plenty of time to play with it. It's a G3617 horizontal-vertical milling machine, and I've used it almost exclusively in the vertical position all this time. I think I have set it up as a horizontal machine only a couple of times. Overall, it's been a good learning tool.
It came with two arbors for the horizontal set up. The fit to the machine is R8, and the arbor diameters are 1.0" and 1.25" respectively. They seem to be nicely made, ground and polished, and with a set of clamp up bushing for each. Also included in the clamp up bushings is one very finely machined and finished bushing, slightly larger than the rest.
I ordered some involute gear cutters in order to make some gears for a project I'm working on. The gear cutters have key ways machined in them, but the arbors don't have key ways.
What gives? Am I missing something? What is the special bushing for? Don't I need a key way on the arbors to drive the cutters?
thanks
It came with two arbors for the horizontal set up. The fit to the machine is R8, and the arbor diameters are 1.0" and 1.25" respectively. They seem to be nicely made, ground and polished, and with a set of clamp up bushing for each. Also included in the clamp up bushings is one very finely machined and finished bushing, slightly larger than the rest.
I ordered some involute gear cutters in order to make some gears for a project I'm working on. The gear cutters have key ways machined in them, but the arbors don't have key ways.
What gives? Am I missing something? What is the special bushing for? Don't I need a key way on the arbors to drive the cutters?
thanks