BG DEVELOPMENTS - Technical Tips:
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Disc Bedding
Heavy braking generates considerable heat which has to be absorbed by the disc, this in turn produces stresses within the disc which can lead to distortion, cracking and reduced service life - Hence it is extremely important that you bed your new discs to ensure heat stabilisation and improve resistance to cracking.

This is particularly crucial if you are using Performance Friction or similar Pads as the bedding procedure also allows these pads to coat the discs with a deposit that gives their high friction coefficient for optimum performance.

Cracks or even disc failure can occur during the first few heavy stops if careful bedding is not carried out.
We recommend you follow this procedure:
  • Use previously bedded pads, preferably the same compound as you intend to use.
  • If brake ducts are fitted they should be ¾ blanked off.
  • For a minimum of 10 miles use brakes gently at first from initially low speeds. Progressively raise speed to normal racing speed but still using gentle applications. Do not left foot brake or drag the brakes.
  • For the final 2 or 3 applications the brakes can be used quite heavily.
  • If you have thermal paint (AP Racing Part No. CP2649-1) applied to the disc then only the green paint should have fully turned to white. The orange paint may have turned on the outside edges only
Following these procedures will boost disc life and curb possible judder problems.
Safety and care of discs: Cast Iron Brake Discs should not normally be operated at bulk temperatures in excess of 610 Degrees Celsius and rotational speeds of 3000 revolutions per minute.