Industrial 1in Female To 1-3/8in 6-Spline Male 75HP 5-11/16in PTO Round Shaft Adapter

Industrial 1in Female To 1-3/8in 6-Spline Male 75HP 5-11/16in PTO Round Shaft Adapter is a rugged coupling that connects a 1-inch female PTO round shaft to a 1-3/8-inch, 6-spline male interface, designed for power take-off systems up to 75 horsepower. With an overall length of 5-11/16 inches, it provides a compact, balanced connection that helps maintain proper alignment and smooth torque transfer between mating PTO components. The adapter uses a standard 6-spline male pattern and round-shaft design to ensure secure engagement and reliable operation in industrial equipment where a 1" female shaft must mate with a 1-3/8" 6-spline male drive. This makes it suitable for applications requiring a direct, rigid 1" to 1-3/8" spline transition without additional adapters or spacers. When selecting this part, verify that the mating shafts conform to the specified sizes—1" female and 1-3/8" 6-spline male—and that the horsepower demand stays within the 75 HP rating to maintain safe torque transmission.