SAE International FLYWHEELS FOR INDUSTRIAL ENGINES USED WITH INDUSTRIAL POWER TAKE-OFFS EQUIPPED WITH DRIVING-RING TYPE OVERCENTER CLUTCHES AND ENGINE MOUNTED MARINE GEARS AND SINGLE BEARING ENGINE MOUNTED POWER GEN... J620_198810

This SAE standard defines flywheel configuration for industry standardization, interchangeability, and compatibility. Table 1 and the figure give the dimensions for the flywheels. For dimensions of industrial power take-offs with driving-ring type over-center clutches, see SAE J621. For flywheel dimensions for engine mounted torque converters without front disconnect clutch, see SAE J927.