This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist. This SAE Standard defines installation dimensions of industrial power take-offs with driving ring-type overcenter clutches.
SAE J621-2012 Referenced Document
SAE J617-2012 Engine Flywheel Housing and Mating Transmission Housing flanges
SAE J620-2012 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 Generators
SAE J621-2012 history
2012SAE J621-2012 Industrial Power Take-offs with Driving Ring-Type Overcenter clutches
1995SAE J621-1995 Industrial Power Take-Offs with Driving Ring-Type Overcenter Clutches April 1989
1989SAE J621-1989 Industrial Power Take-Offs with Driving Ring-Type Overcenter Clutches
1977SAE J621D-1977 INDUSTRIAL POWER TAKE-OFFS WITH DRIVING RING TYPE OVERCENTER CLUTCHES
1977SAE J621-1977 Industrial Power Take-Offs with Driving Ring Type Overcenter Clutches