Cummins 4BT – Pitting Reuse Criteria

A single pit should not be greater than the area of a 2 mm [.079 in] diameter circle.

Interconnection of pits is not allowable and is treated as one pit.

The total pits, when added together, should not exceed a circle of 6 mm [0.236 in].

Only one pit is allowed within + or -20 degrees of the nose of the cam lobe.