911 Carrera (997) F6-3.6L (2006)
PCCB surface roughness (Sr) = 56 micrometer (view 1)
1.2.
Surface roughness (Sr) = 56 microns -see illustration- (view 1)
PCCB surface roughness (Sr) = 56 micrometer (view 2)
Surface roughness (Sr) = 56 microns -see illustration- (view 2)
In the advanced stages of fiber burn-out and the initial destruction of the Si and SiC 'matrix', the depressions have become more pronounced.
Large sections of the surface are still intact, the depressions form an even, fine-grained pattern.
The surface still feels matt, however, and the roughness is not yet pronounced.
No replacement necessary!
PCCB surface roughness (Sr) = 72 micrometer (view 1)
1.3.
Surface roughness (Sr) = 72 microns -see illustration- (view 1)
PCCB surface roughness (Sr) = 72 micrometer (view 2)
Surface roughness (Sr) = 72 microns -see arrow- (view 2)
Borderline disc, which can still just be evaluated as OK. As a result of more advanced damage to the surface, the depressions are larger, and