- Jan 4, 2011
- Reaction score
I just stripped a gear on an engine and now I have to make a new gear. The first gear was brass and obviously was not strong enough. I am making a new one out of steel. I just purchased a set of divider plates for my rotary table so that I could cut gears. This is great, now I get to play with my new toys. The gear is 2 1/2 OD with a hub and 3/8 bore. I am just about done with machining the blank and I started thinking about how I was going to hold the blank on the rotary table. In the past I have used my spin indexer which uses a 5C collet so as long as I left a hub which would fit in the collet or had a bore which I could adapt to the collet I could hold on to the blank. I have a 6" rotary table and have a 6" three jaw chuck mounted to the table. Unfortunately if I hold the blank in the chuck the cutter hits the chuck. I also have a 4" chuck which I could mount to the table but even that will not clear the cutter. Any ideas on how to hold this blank? How have others done this? The only thing I can come up with is to hold my hex 5C collet block in the three jaw chuck.