Quote:
Originally Posted by techhelpbb
For those of you that broached gears how did you align things?
I tried a rotary broach in a Bridgeport but found it difficult to get a good center. The existing keyway in the gear would end badly on a coaxial indicator. I tried a few times with a 0.2 edge finder and the DRO but still managed to be broached straight but slightly off center.
It is either I am off center or my back plate protecting my chuck face is not rigid enough. It is strange because I drill out the hole to 33/64" and chamfer before I go in. Center does not move. I have not tried this much lately....maybe just have not gotten the knack of it.
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We use a standard push broach, and it works fine for keyed gears. Fine enough for FRC, anyway.