This sprocket is 10mm pitch with 30 teeth. It drives the stainless steel shaft and is the reciprocal gear (via a drive belt) for the electric motor - You can see there is only a 'guide' on one side of the sprocket. This is because when we machined the centres to size we could not properly hold the sprocket in the lathe without damaging the guide. I have devised a belt guide which attaches to the main drive plate. I will probably change this sprocket because the gear ration it produces against its reciprocal 12 teeth electric motor sprocket is only 2.5 :1 which is what I figured I needed when the whole system ran at 24 volts. Now that the voltage has doubled, the sprocket speeds are also doubled. The electric motor currently at this ratio gets excessively warm when it is producing the power I require. By increasing the gear ratio to 4 : 1 I hope to cure the problem because the motors should be much happier producing the power at higher speed and the cooling mechanism built into their design will be more effective.