Power Take Offs - NACD manufactures PTO assemblies from the small 7 1/8” and 7 7/8” housing bore applications with 4.5” and 5.5” oil bath or dry clutches suitable for horizontal shaft gas and diesel engines used in the construction industry for pumps, compressors, mixers, blowers, generators and other applications where a cut-off clutch is required, up to the larger housing sizes SAE 6 through SAE 1 with bronze-bearing and ball-bearing released over-center clutch sizes ranging from 6.5” single, 10” single, 11.5” single and double, 14” single, double, and triple plates.