• Electric Clutches and Brakes
• Custom Rolling Element Machined Bearings
• Overrunning and Bi-directional Clutches and Backstops

Overrunning and Bi-directional Clutches
and Backstops
for Fixed Wing Aircraft Applications

Ideal for:

• Turbine starters
• Auxiliary power unit (APU) starters
• Accessory drives
• Flight controls
• Actuators and positioners

Formsprag clutches and backstops are the preferred one-way or bi-directional clutch or backstop when a purely mechanical solution is required, or as an integral part of a larger hydraulic or electric system. From a basic engineered sprag retainer assembly to a complete custom overrunning clutch system, Formsprag Clutch can provide the necessary level of complexity required for the application solution. Free action sprag retainers provide the greatest number of load elements compared to other one-way clutch technologies.

Formsprag Clutch Overrunning Clutches Also known as sprag retainer assemblies, one-way clutches, or freewheels Free-action retainers Positive Continuous Engagement (PCE) sprags Formchrome sprags Instantaneous action with no backlash, high torque density Formsprag Clutch Form-Lock & Reverse-Lock Bi-directional clutches and Backstops Bi-directional, purely mechanical operation Minimal backlash Smooth, consistent torque transmission Positive holding under load Custom configurations for virtually any application