Cal, if you don't mind, may I ask a question? First off, I just bought a gear style Bridgeport feed assembly that I am planning to put on the Z axis handle. Second, I've looked and thought long and hard about this, I am planning on going the modify route on the power Y. Mainly, the thoughts have come while I've bored too many holes to like doing it without power.
My question, when you pull the Y axis handle off, there is dial. That slides off and you see three cap screws and two open pin spanner holes. Does that cap thread in and out or does it come out another way?
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I'm not sure. I haven't dug into that part of my machine. I've got the cutter-head and ram gearbox apart, but nothing below that.
The manual seems to indicate that the piece with the "spanner holes" (part 16-1124) isn't threaded and the three cap screws make it unlikely that it's threaded into the knee. The holes may not be spanner holes at all: the manual shows matching holes in the knee casting and appears to call out dowel pins (part 9983). Maybe the last guy didn't put the dowel pins back?
I'm not sure what's the best way to get it free. Maybe use lever or jack between the column and the back of the table to push the table forward, using the end of the Y screw to push it out of the knee?
Cal