[Creator Mat]

Originally Posted by MattC9

Thanks for all the replys, they have all been great. I took this picture right after we put the sprocket in and now it does have a 2nd point of contact. Our arm is a 4 bar linkage with a 30in "finger" on the end of it and it weighs about 35lb, so I think our gear box should be fine. Our main mentor loved the idea of putting a guard on the chain, that will come out sometime tomorrow.

I would be careful on relying on the p60 gear box for that application. You said your arm is 35 pounds, well if that is true any time the center mass of the arm is greater than 1 foot away from your pivot point. The gear box is at a significant risk of stripping its inner gears.

Torque= Force X Distance
35 ft-lb=35lb X 1ft