This standard specifies the magnetic particle inspection and assessment methods for internal combustion engine crankshafts and camshafts. This standard is applicable to the inspection and assessment of surface and near-surface defects of crankshafts and camshafts of reciprocating piston internal combustion engines with cylinder diameters less than or equal to 200mm.
JB/T 6729-1993 history
2007JB/T 6729-2007 Internal combustion engines.Magnetic particle inspection for crankshafts and camshafts
1993JB/T 6729-1993 Internal combustion engine crankshaft, camshaft magnetic particle inspection