What is a Power Take-Off (PTO)?

Power take-offs (PTOs) serve as essential components in industrial and off-highway applications where a disconnect from the power source is required.

Typically connected to industrial diesel engines, PTO clutches link to the engine and provide a shaft for connecting to auxiliary equipment. When engaged, PTOs transfer power from the engine to auxiliary equipment, while disengagement allows the engine to continue running without powering the auxiliary equipment.

The Necessity of a Disconnect Mechanism

A common question in machine design concerns the need for a disconnect mechanism when direct drive to the engine remains an option. The disconnect functionality proves invaluable in situations where auxiliary equipment may experience sudden stoppages. Consider rock crushers, for example, which can become clogged with material. In such instances, the crusher can be disconnected from the engine, preventing potential damage.

Additionally, cold diesel engines benefit from starting without a full load, particularly in regions experiencing colder temperatures. The PTO allows operators to start the diesel engine and permit proper temperature attainment before engaging the auxiliary equipment.

Beyond Basic Functionality

While providing a disconnect mechanism represents the primary function of power take-offs, they offer additional benefits within machinery:

Speed Reduction Capabilities

PTOs can achieve speed reduction from the engine to auxiliary equipment. Applications such as dredge pumping, slurry pumps, and crushers often require the driven load to operate at speeds lower than the typical 1800-2100 RPM of industrial engines. PTOs can accommodate these requirements through the implementation of sheaves and belts, enabling speed reduction to meet specific operational needs—even down to 600 RPM.

Protection for Expensive Components

Another significant advantage of power take-offs is their role as relatively inexpensive wear items positioned between diesel engines and auxiliary equipment. When unexpected stoppages or failures occur in machines with engines valued at $100,000 or more, the PTO serves as a protective barrier, preventing wear and damage to the costly engine.

Industry-Leading Manufacturers

Palmer Johnson Power Systems represents some of the most reputable manufacturers of power take-offs in the industry:

Twin Disc

With a rich history dating back to 1918 in Racine, Wisconsin, Twin Disc introduced industrial power take-offs to the global market. Renowned for superior quality, Twin Disc provides PTOs for diverse equipment including irrigation pumps, mixers, shredders, rock crushers, wood chippers, and blowers.

Transfluid

Based in Italy, Transfluid has established a global reputation for excellence in manufacturing power transmission and hydraulic products. With decades of experience and innovation, Transfluid has become a leader in power take-off systems, delivering high-quality solutions across various industries that ensure optimal performance and reliability in demanding environments.

Wichita Clutch

Since its founding in 1949, Wichita Clutch has specialized in designing and manufacturing high-quality power take-off and clutch products for industrial applications. At the forefront of innovation in power transmission technology, Wichita Clutch products ensure efficient and dependable operation even in the most challenging environments.

Power take-offs represent critical components in industrial machinery, offering disconnect capabilities, speed reduction options, and protection for expensive engine components. With applications across numerous industries and support from leading manufacturers like Twin Disc, Transfluid, and Wichita Clutch, PTOs continue to play an essential role in efficient and reliable power transmission systems.

For assistance selecting the appropriate PTO for your specific application, contact Palmer Johnson Power Systems or submit a request for expert guidance tailored to your project requirements.