How much torque can a sprag clutch hold?
How much torque can a sprag clutch hold?
759300Nm – 560000lb.ft.
Clutch with reservoir, torque arm and auxiliary seal with bolt and retaining plate. Max torque 759300Nm – 560000lb. ft. Max bore 500mm – 20.0 ins.
What is sprag type clutch?
A sprag clutch is a one-way freewheel clutch. It resembles a roller bearing but, instead of cylindrical rollers, non-revolving asymmetric figure-eight shaped sprags, or other elements allowing single direction rotation, are used.
What does a sprag clutch do?
A sprag clutch has cam-shaped steel wedges (or sprags) that are placed at an angle and controls the one-way direction of movement. When the movement tries to go in the opposite direction an instant driving disengagement or locking occurs.
What does a sprag clutch hold?
This clutch uses spring loaded sprag rollers that allow one element to freewheel around the other until the direction is reversed. A sprag clutch is often utilized in the automatic shift transmission of a motor vehicle. It is also employed in various types of helicopter, motorcycle, and hoist applications.
How do I know if my sprag clutch is bad?
Sprag Clutch Failure Symptoms Often Include:
- Clutch Pedal Makes Noises When Engaging and Disengaging.
- Clutch Pedal Chatters When You Accelerate.
- Clutch Pedal Pulsates.
- Clutch Pedal Remains Stuck to the Floor.
- Clutch Pedal Feels Loose or Spongey.
- Clutch Pedal is Hard to Engage.
What’s a sprag gear?
Sprag clutches belong to the family of overrunning clutches. They consist of cylindrical inner and outer races with sprags filling the space between. Sprags are sized, shaped and mounted in a way that causes to wedge between the two races transmitting torque from one to the other when rotated in the drive direction.
What causes clutch failure?
Sudden and gradual failure Sudden failure is most often caused by a broken or loose clutch cable, linkable or a failed hydraulic master/slave cylinder. There can also be leaks in the hydraulic line or even the disc could be contaminated with something like dirt or debris.
What causes a clutch to burn out?
How Does It Happen? Perhaps the reason it’s said that a clutch is “burning out” is because of excessive heat generated from a slipping clutch, or the putrid smell of a slipping clutch disc against the flywheel. The materials that comprise a clutch disc are, shall we say, fragrant when they heat up.
Who invented the sprag clutch?
Ted Zlotec
At 91 years of age, Ted Zlotec, Formsprag Director of Aerospace Products, and the designer of the original Formsprag spray retainer clutch patented in 1959, still works five days a week.
