chawalang
Well-Known Member
I wanted to get peoples thoughts on a design decision I found on a winch for a fire door. Looking at the motor there is the sprocket on the shaft on the gear box that goes to a shaft on two pillow blocks. It goes to a sprocket that is a little smaller, there is another sprocket on the shaft that is even smaller that then goes to the sprocket on the drum. Can someone please explain to me this design decision. I have a few thoughts on it but wanted some clarity. I know how to do the math going from motor, motor box, speed reducer sprocket then to drum sprocket to determine the load it can max hold minus 25%, at the max speed but was curious about this. this obviously looks like in has a few more steps.