Pressing Pinion onto Banebot RS775

[sanddrag]

Anyone have an opinion of plopping an AM planetary into a 3-stage GEM-500 and driving it with the 775 with a drilled out and pressed on FP pinion? And then maybe go 3 or 4:1 in sprockets and chains to an arm with say 75 ft-lbs of torque at the arm joint. Doing the same with a P60 worries me a little.

I reckon it'd work mighty-fine, and be a good deal stronger than a P60, due to the all-steel 20DP gears. Anyone agree? I take it's rather easy to modify the AM planetary motor plate to accept the 775?

[JamesCH95]

Originally Posted by sanddrag

Anyone have an opinion of plopping an AM planetary into a 3-stage GEM-500 and driving it with the 775 with a drilled out and pressed on FP pinion? And then maybe go 3 or 4:1 in sprockets and chains to an arm with say 75 ft-lbs of torque at the arm joint. Doing the same with a P60 worries me a little.

I reckon it'd work mighty-fine, and be a good deal stronger than a P60, due to the all-steel 20DP gears. Anyone agree? I take it's rather easy to modify the AM planetary motor plate to accept the 775?

My intuition says that it'll work fine. 75lb-ft at the arm joint? o.O remember that the RS775 (or any motor) won't put out "stall torque" for any appreciable amount of time, it's breaker will trip.

[de_]

Our RS-775 is 4.97 mm = 0.1957.
What size reamer are you guys using to get a press fit ?
Can you buy custom sized reamers somewhere ?

[JamesCH95]

Originally Posted by de_

Our RS-775 is 4.97 mm = 0.1957.
What size reamer are you guys using to get a press fit ?
Can you buy custom sized reamers somewhere ?

I've gotten away with using a #10 drill bit (0.1935in) but it is not the best way to do it.

Edit: McMaster has the sized reamers you want.