Break-in

For best results, PMDC motors should be broken-in. This allows the brushes to form concave surfaces around the commutator, maximizing contact area. It also helps remove any sharp edges on the commutator that may have been left during the manufacturing process.

We recommend breaking in motors using water. Connect wires to the motor and place the motor in a jar of water. Run the motor at 3 volts (or just enough to get it spinning slowly). Stop running the motor after 15 minutes or when the water turns black. Pull the motor out of the water, dry the motor (with shop air or "buggy blast"), and lubricate the bearings with a drop of oil.

Your motor is now ready to run at its maximum potential. Break-in must be done before the motor is run at full voltage This is especially useful if the motor will be over-volted.