The paper covers basic design factors, testing procedures, and application considerations for clutches used in motor trucks, farm tractors, construction equipment, and stationary power units. Clutches discussed include spring loaded dry, spring loaded wet, over-center dry, over-center wet, electromagnetic single plate dry, electro-magnetic multiple disc wet, and hydraulic multiple disc.
Basic and theoretical aspects of clutch design are converted into practical information useful in designing and applying clutches of various types. Because the scope of the paper is broad, many formula derivations were omitted to permit presentation of as much practical material as possible.