Prop and Fan Balancer

Here are some pictures of my prop balancing setup. The theory behind this balancer is that gravity will rotate the heavy side down. In this scenario the less friction the better.

I used a 5/16" steel rod centered in the fan with cone shaped bushings. This assembly rotates on a pair of leveled angled extruded aluminum.

Since a heavy blade will rotate down. The heavy blade is sanded until the fan will not rotate when left in any position. With 4 bladed fans, it is easier to balance 2 blades at a time. Number the blades 1 through 4 going clockwise. Balance 1&3, then 2&4.