Formsprag FSO-500 Overrunning Clutch CL42154-8 with 1.125 Bore

The Formsprag FSO-500 is a high-performance overrunning clutch designed for industrial applications requiring reliable freewheeling in one direction while preventing reverse rotation. Manufactured by Formsprag, a division of Dana Corporation, this model features a robust sprag design that ensures high torque capacity and durability under demanding conditions. Key applications include conveyor systems, pumps, fans, and power transmission equipment where backstopping or indexing is essential. Advantages include oil-lubricated operation for extended life, high-speed capability, and easy integration with standard shaft sizes. Compared to similar products like Warner Electric or Stieber clutches, the FSO-500 offers superior torque-to-size ratio and resistance to contamination. Drawbacks may include the need for periodic lubrication and higher initial cost. This unit, model CL42154-8 with FSO-500/1.125 designation, appears to be in used condition based on image analysis, showing minor surface wear but intact labeling and components. It includes an operation manual and original packaging, making it suitable for maintenance or replacement in manufacturing environments. For detailed specs, refer to manufacturer datasheets; note that exact performance may vary with lubrication and installation.