slot car wheel balancer

thingiverse

slot car wheel balancing jig use the rectangular type slot car magnets supplied in various slot car makes measure the distance between the magnet faces and cut a spare slot car axle 1mm shorter ( in the pic i cut the axle too short so just added another magnet ) using a lathe / Dremel / drill , create points at both ends of the axle ( the sharper the point the better ) also ensure the point is central on the axle , this is essential for correct balancing , a lathe is the most accurate mount the wheel and tire to be balanced , the magnetic forces will hold one end to one of the magnet faces , the other end will be supported by magnetism spin the wheel / tire / axle assembly manually and wait until it stops spinning the heaviest part will come to rest at the bottom mark the top and and then add a little weight ( small pieces of fine solder wire is good for this ) repeat until the wheel assembly spins without any perceivable heavy side patience is required , but very worth it enjoy