For this low speed application, a Mach III end of shaft mounted clutch with a bronze bushing pilot was required.  The pulley the customer intended to use, however, was too wide for the pilot of the catalog model clutch and would have resulted in an overhung load.  Operating a clutch with an overhung load will cause uneven and premature wear and may result in the clutch “walking” off the shaft. 

Overhung Load

To accommodate the pulley, Mach III produced the pictured clutch which is similar to the catalog model only with an elongated pilot.  The elongated pilot provides proper support for the pulley by centering it over the bronze bushing.  For guidance on proper attachment of sprockets and pulleys, download our eBook:  Mounting Sprockets and Pulleys on Pilot Style Clutches