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PN Racing Gear Reference Chart
Stock motor break-in tips
PN Racing Gear Reference Chart   Top
21-Nov-2011
Includes 126 Pitch now
 
Stock motor break-in tips   Top
21-Nov-2011
1) back in the 1/10 days, we used to break-in new motors by submerging them into water until the water turned from clear to black. I used to use an old water bottle but in have (use the bottom half). Fill it with enough water so that the motor can be submerged. Hook up the motor to a power source (so the motor is working) and then submerge it (still running) into the water. What this does is break in the brushes,i.e. brushes will now contact the comm(commutator) fully, yielding more power.

For mini-Z, I'm recommending no more than 45 seconds, regardless of the colour of the water. Any longer than that and you'll have no brushes left (they will be worn too much). You'll find you have no power on the track.

Remove the motor from the water and let it dry completely. Lube the bushing/bearing with some quality oil (I use either Reflex Racing or Atomic lube), install and run it.

2) Use a break-in stand. I use the PN one. To use, connect the slave motor to a power source (should be between 1.5V to 2V) and run for 45 mins.

From PN's site directly:

When properly broken in, a motor can achieve a 10% to 20% increase in power over a motor that has not been broken in.

The PN Racing Motor Break in kit includes the motor stand, a slave motor, and pinion gears.

Using a slave motor allows the motor to break in without running under its own power (which heats everything up and glazes the bushings, preventing a quick break in). Properly seating the bushings will increase performance by reducing drag. If you run the motor under its own power to break it in, you risk heating and glazing the bushing surface where the armature pole makes contact. A glazed surface will be harder to wear in. When running the motor under its own power arching occurs that may pit the brushes and communicator before the communicator can be properly worn in by the brushes. Using a slave motor will drastically reduce the amount of arching. Note that the only way to remove arching completely on the new motor would be to remove one brush and break each brush in individually.

Most experts agree that a motor should be broken in at 1.5 to 3 volts for 10 mins or more. This can be achieved by connecting to the Much-More Motor Maser, using the motor break in feature of the ICE charger, or simply connecting the slave motor to a single 1.2 AAA cell for 1.5 volts or 2 AAA’s in serial for 3 volts.

Please note that it is important to keep the lead wires separate on the slave motor as well as the break in motor during operation.
 
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