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Hilliard Overrunning clutches are used to transmit power between a shaft and a gear, sprocket, sheave, or pulley mounted on the clutch or to directly connect two shaft ends. The roller type clutch construction is one of the oldest over-running or free wheeling designs.

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Magna Torque (MT)


Hilliard’s line of overrunning clutches is economically priced and ideally suited for backstopping and gearbox applications. Custom designs and rapid prototyping are available. The overrunning clutch can be used for ratchet-type indexing operations such as packaging equipment and printing presses. When used in conjunction with a torque arm to hold the output shaft, Hilliard overrunning clutches provide instant backstopping protection with zero backlash from reversed rotation whenever power to the conveyor’s drive unit is interrupted.

Applications

Industrial Fans - Material Handling - Packaging/Printing - Steel Industry

Type: Backstopping & Indexing

Documents

Magna Torque (Brochure)

Magna Torque (MTR)


An integral part of many Hilliard motion control products is our roller-ramp design. The use of hardened cams and precision-machined rollers maximizes service life. There is almost no wear during freewheeling operations because rollers are free to rotate between the outer member and the inner cam. When the rollers are engaged, the load falls at random positions on the rollers. The result is superior service life and reliability. The Magna Torque is similar to the MT design except the cam surface is reversed allowing it to be used in multi-speed/dual drive applications.

Applications

Concrete/Construction - Fans - Steel Industry - Textile Machines

Type: Multi-Speed Drives/Dual Drives

Documents

Roller Ramp Magna Torque (Brochure)

Dual Drive & Turning Gear


Typical applications for dual-source drives are blowers, pumps and fans. For multi-speed drives, our overrunning clutches are ideal in such operations as conveyors and forming rolls.

Applications

Exhaust Fan - Induced Draft Fan - Steel Industry

Type: Skid Mounted Fan Drive System

Documents

Dual Drive Overrunning Clutches (Brochure)

Sprag Clutches


Hilliard Sprag Clutches are designed for overrunning, backstopping and indexing applications. This clutch is a freewheeling device with an inner race and an outer race, either of which can be the input or output member. The input can drive the output in a chosen direction and permit the output to overrun in the same direction. The clutch consists of a cage full of steel sprags or wedges, located in the space between concentric inner and outer races. Power is transmitted from one race to the other by the wedging action of the sprags between them. Rotation in one direction causes the sprags to tilt and wedge, preventing rotation. This allows free rotation in the opposite direction.

Applications

Industrial Fans - Material Handling - Mining - Packaging/Printing - Printing Press

Type: Backstopping & Indexing

Documents

Overrunning Sprag Clutches (Brochure) HSO-HSX Sprag Clutches (brochure)

Enclosed Overrunning Clutches


Hilliard’s Enclosed Overrunning Clutch incorporates superior MTR design in a totally enclosed package. Designed for power transmission operations, this clutch is totally contained in a stationary housing for constant protection from hostile environments or wash-downs. Lubrication system provides continuous oil circulation. Breather filter attached to equalize pressure without introducing contaminants.

Applications

Power Generation - Turning Gears

Type: Self Contained/Wash Down

Documents

Enclosed Overrunning Clutch (Brochure)

High Speed Overrunning Clutch Starter Drive


The Hilliard High-Speed Overrunning Clutch provides positive engagement and high torque on demand. Featuring a unique roller-ramp design, the clutch when engaged transmits power via the precision-machined cam and roller assembly connected to the input shaft. A ball bearing at each end of the roll cage supports and aligns the cam in relation to the drive (output) shaft.

Applications

Power Generation

Type: Positive Engagement w/High Torque

Documents

High Speed Overrunning Starter Drive (Brochure)
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