Checking Brake Discs For Minimum Thickness

Information

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Minimum thickness of PCCB brake disc

For perforated brake discs, the minimum thickness -X- must always be measured on the inner or outer friction surface track -arrows- .
Wear limit: The brake disc minimum thickness is stamped on the brake disc hub (example: Min. Th. 33.7 mm).

1.1 Measure the brake disc thickness -X- close to the outer or inner friction surface track -arrows- at least three different points -A, B, C- offset by 120°. A commercially available micrometer screw or a brake disc gauge is a suitable measuring tool.

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Measuring points for brake disc thickness, shown on a grey cast-iron brake disc