Checking Brake Discs For Minimum Thickness

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Information

For perforated brake discs, the minimum thickness -X- must always be measured on the inner or outer friction surface track -arrows- .

Fig 1: Identifying Minimum Thickness Of PCCB Brake Disc
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Wear limit: The minimum brake disc thickness is stamped on the brake-disc chamber (e.g. Min. Th. 37.7 mm) .

Measure the brake thickness -X- with a suitable micrometer screw gauge or a brake disc gauge around the inner or outer friction surface tracks -arrows- .