Basic Information

Checking involves the following: 

1. Visual inspection for any surface changes to the brake disc friction surfaces Indication of wear: Associated surface fracture > 1 cm²-arrow-  , but no accumulation of smaller fractures → Visual inspection of the surfaces of the brake disc friction surfaces (indication of wear)  .
   Fig 1: Locating Associated Surface Fracture

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. Assess the surface roughness (Sr) of the brake discs (max. 80 μm permitted), since this affects smoothness of braking (noise), braking performance/pedal pressure and brake pad idle time → Evaluating surface roughness (Sr) (max. 80 micrometer permitted)  .
   Fig 2: Identifying Surface Roughness Of PCCB Brake Disc

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3. Check brake discs for minimum thickness -x-  . The minimum thickness of the brake disc (example: Min. Th. 33.7 mm) is stamped on the brake disc chamber → Checking brake discs for minimum thickness  .
   Fig 3: Checking Minimum Thickness Of PCCB Brake Disc

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4. Check brake discs for edge damage -see Fig 4- (damage caused as a result of improper use) → Checking brake discs for edge damage  .
   Fig 4: Identifying PCCB Brake Disc Edge Damage

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Checking involves the following: 

1. Visual inspection for any surface changes to the brake disc friction surfaces Indication of wear: Associated surface fracture > 1 cm²-arrow-  , but no accumulation of smaller fractures → Visual inspection of the surfaces of the brake disc friction surfaces (indication of wear)  .
   Fig 1: Locating Associated Surface Fracture

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. Assess the surface roughness (Sr) of the brake discs (max. 80 μm permitted), since this affects smoothness of braking (noise), braking performance/pedal pressure and brake pad idle time → Evaluating surface roughness (Sr) (max. 80 micrometer permitted)  .
   Fig 2: Identifying PCCB Brake Disc Surface Roughness

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Check brake discs for minimum thickness -x-  . The minimum thickness of the brake disc (example: Min. Th. 33.7 mm) is stamped on the brake disc chamber → Checking brake discs for minimum thickness  .
   Fig 3: Checking PCCB Brake Disc Minimum Thickness

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Check brake discs for edge damage -see Fig 4- (damage caused as a result of improper use) → Checking brake discs for edge damage  .
   Fig 4: Identifying PCCB Brake Disc Edge Damage

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.