Cordless drill upgrade for about $40

Step 6 The mechanical mechanism

In this step I placed the small gear on the motor then used a small amount of super glue. The plastic shell has rubber pads so the motor does not need to be glued in place. in my case the motor shaft and the motor was the perfect size, but if the shaft on the motor is too small you could add a small brass tube. If the shaft is to big you could drill the gear to make the hole bigger but if the hole is too big the gear will break apart. If the motor is too small then you could put a piece of pvc pipe around the motor so it will fit. If the motor is just slightly smaller then you could wrap the motor with paper and tape.