Safety & Care of Discs
Discs must be regularly and frequently inspected for excessive heat crazing and cracking.
Discs with cracks emanating from mounting holes / slots, inside diameter, scallops, or outside diameter should be changed immediately.
After heavy and prolonged use some surface crazing will often be evident. If this turns into distinct surface cracks which are radiating towards the inside or outside diameter the disc should be changed.
IF IN DOUBT REPLACE