HEX-FLX Flywheel Couplings
PRODUCT DESCRIPTION – Flywheel Couplings

The HEX-FLX Flywheel Coupling provides operation below critical speeds with its high torsional stiffness. It minimizes spline fretting and has the best shaft clamping abilities in its class (Patent No.: US 7,645,089 B2, Jan. 12, 2010). This coupling may be blue, but don’t let it get you down. Replacing existing couplings of similar design with the HEX-FLX may even put a little $$ back in your budget.



 Select your assembly based on your engine and pump information (Click Below)


  • High torsional stiffness which allows operations below critical speeds
  • -40° to +300°F operating temperatures
  • Light and compact with long service life
  • Handles high shock loads Easy, two-piece blind mounting
  • Sintered hubs can be modified in form and length as needed (call for details)
  • Various series for standard SAE flywheels
  • Secure locking system to eliminate fretting (Patent No.: US 7,645,089 B2, Jan. 12, 2010)
  • Economically priced and normally in stock

This two-piece flywheel coupling is used on Off-highway construction equipment such as;

  • Arial Lifts
  • Bucket Loaders
  • Skid Steers
  • Excavators
  • Sweepers
  • Wheeled Loaders
  • … and much more.

When installing onto straight keyed shafts, be sure your key is the full length of the flywheel coupling body. If this is not done, warranty will not be considered in the event of a failure.

Hayes Manufacturing, Inc.

The evolution of Hayes Manufacturing from a small garage to a state-of-the-art manufacturing facility for stub shafts, splined couplings, flywheel couplings and drive couplings is nothing short of an American success story. The company has come a long way and is still growing.

In 1966, Hayes Manufacturing started out as a fledgling, family business in a garage in Rochester, Michigan where it was primarily a job shop. Today, Hayes makes stub shafts, flywheel couplings and drive coupling products in a 33,000 square foot facility in Fife Lake, Michigan. We employ skilled personnel who take pride in manufacturing our engine housings, drive couplings, spline couplings, pump mount plates and flywheel couplings in the USA.  Hayes is certified to the ISO 9001 quality standard and the ISO 14001 environmental standard.

During all aspects of the manufacturing process of our flywheel couplings, pump mount plates, engine housings, drive couplings, stub shafts (and every one of our manufactured components), you can be sure that we employ rigorous quality standards and lean manufacturing practices.  Hayes Manufacturing is constantly evolving its product line to meet the needs of customers– contact us today to discuss your application.

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