Hi all, brand new to the forums. I'm a student of chemistry so I am very unknowledgeable about mechanical engineering and need some help. Not asking for spoon-feeding. What I am trying to accomplish is fairly simple(I hope). I would like an electric DC motor to turn a 1in diameter teflon rotor that is housed in a teflon bearing assembly. Ideally I would like for this to spin at a speed of about 60RPM with say a 2kg load. Sounds simple enough. Here's where the inquiries come in. Should I be using a a pulley system, a gear system? Chain and sprocket seems like over-kill. The way I understand it, the pulley is the way to go with a V type or flat belt to maintain torque(though there is loss) and ensure the belt lasts a bit. Whereas the o-ring belts are designed for low-torque. The only caveat with the pulley system is, sourcing the parts. it is incredibly hard to find a decently large(1" diameter) pulley that will mount to a 3mm(3/16") or 4mm electric motor shaft. I was thinking delrin because they are fairly affordable and the project is for fun on my own budget, however the OD's on these tend to be very small. It is also very hard to find a 1" bore pulley with a relatively small OD that has a screw notch(so it can be fixed to the rotor). Then finding a belt to match both of these pulleys is also incredibly pain-staking. Life would be a lot easier if they made pulley pinions. edit - so after some research I have found that they use 'prop adapters' to mount things such as propellers directly to motor shafts for RC helicopters/planes. This should be able to fix a pulley directly to a motor. That helps quite a bit. If anyone knows a good place to find affordable pulley's please post some links! Or should I scrap the pulley idea and try to source gears? Not sure if gears transfer torque very well or not and struggled to find information on this. Sorry to make a long-winded first post, but I am pretty stuck here. Thank you for any suggestions.