Disc / Drum Machining & Cleaning

Disc/Drum Machining & Preparation

Machine disc/drum using the slowest feed rate. Do not take heavy cuts. The final cut should be minimal depth to minimize any grooving on the surface.
After machining, clean the disc/drum with 240 grit emery on both surfaces (do this while the disc/drum is spinning on the lathe) to obtain a smooth non-directional surface finish.


Disc/drum machining may leave a fine film of graphite on the disc/drum surface. Always clean down the disc/drum surfaces using Brake & Parts Cleaner or methylated spirits after machining. Never use petrol as it contains waxes which can remain on the disc/drum surfaces after the solvents evaporate. The waxes act as a lubricant, reducing braking efficiency.

After fitting, once again wipe down the disc/drum. Only use a clean rag and Brake & Parts Cleaner or methylated spirits.

Bedding-In Procedure

To maximize the performance of brake pads, it is essential that they are bedded in correctly as follows:

  • Accelerate vehicle to 50km/h
  • Apply brakes using moderate to firm pedal effort, reducing speed to 5 km/h
  • Drive 200m – 300m accelerating to 50 km/h
  • Repeat steps 1 to 3 between 8 – 10 times