Basic Information

Checking involves the following: 

1. Visual inspection for surface changes in the brake disc friction surfaces. Indication of wear: Connected surface fracture > 1 cm²-arrow-  , without adding up smaller fractures.
   Fig 1: Locating Brake Discs Fractured Surface

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2. Check surface roughness (Sr) of brake discs (max. 80 μm permitted) since this affects braking comfort (noises), braking behavior/pedal pressure and brake-pad service life.
   Fig 2: Identifying PCCB Brake Disc Surface Roughness

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3. Check brake discs for minimum thickness -x-  . The minimum brake disc thickness (e.g. Min. Th. 33.7 mm) is stamped on the brake-disc chamber.
   Fig 3: Identifying PCCB Brake Disc Thickness

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4. Check brake discs for edge damage -see figure-  (damage due to improper use).
   Fig 4: Identifying PCCB Brake Disc Edge Damage

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