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Mechanical Clutches

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About Mechanical Clutches

Mechanical clutches are equipment drive assemblies that contain mechanically actuated components for connecting two shafts so that they can either be locked together and spin at the same speed, or decoupled and spin at different speeds. Engaging the clutch transfers power from an engine to devices such as a transmission and drive wheels. Disengaging the clutch stops the power transfer, but allows the engine to continue turning. Mechanical clutches are less expensive than pneumatic or hydraulic clutches, but do not provide the same range of torque. They are best suited for vehicles and industrial equipment such as hoists and cranes.  Small mechanical clutches are actuated directly with cams or levers, while larger clutches are operated through compound linkages. Usually, mechanical actuation is feasible only when the lever or pedal can be located near the clutch. Some mechanical clutches can be actuated from long distances, but friction losses in the linkage or cable may be high. 

Specifications for mechanical clutches include torque rating, power, and rotational speed. Spring-return clutches require power to engage. Spring-actuated clutches require power to disengage. A variety of engagement methods are available. Non-contact clutches uses methods such as magnetic fields and eddy currents. Friction clutches generate friction between contact surfaces. Wrap spring clutches transmit torque from the input to the output through a wrapped spring that uncoils to disengage the clutch. Oil shear clutches achieve drive engagement through the viscous shear of transmission fluid between the clutch plates. Sprags, steel wheels that tip in one direction to wedge between inner and outer races, are clutches that can often transmit more torque than other slip or overrunning devices. Ball detent clutches feature a slip mechanism in which, upon overload, seated balls are dislodged and overcome springs or air pressure engagement. Similarly, pawl clutches overcome spring or air pressure engagement and rotate out of their detent. With roller detent clutches, rollers that are held in place by springs wedge between the inner and outer races to engage the clutch. 

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Products & Services Related to Mechanical Clutches

Electric Brake and Clutch Assemblies
Electric brake and clutch assemblies consist of elements for both the connection and disconnection of shafts (clutch) and for the slowing or stopping of shafts (brake) in equipment drives.
Electric Clutches
Electrical clutches are assemblies consisting of elements for the connection and disconnection of shafts (clutch) in equipment drives.
Hydraulic Brake and Clutch Assemblies
Hydraulic brake and clutch assemblies consists of elements for both the connection and disconnection of shafts (clutch) and for the slowing or stopping of shafts (brake) in equipment drives.
Hydraulic Clutches
Hydraulic clutches are assemblies consisting of elements for the connection and disconnection of shafts (clutch) in equipment drives.
Mechanical Brake and Clutch Assemblies
Mechanical brake and clutch assemblies consist of elements for both the connection and disconnection of shafts (clutch) and for the slowing or stopping of shafts (brake) in equipment drives.
Pneumatic Brake and Clutch Assemblies
Pneumatic brake and clutch assemblies consist of elements for both the connection and disconnection of shafts (clutch) and for the slowing or stopping of shafts (brake) in equipment drives.
Torque Limiters and Slip Clutches
Torque limiters and slip clutches automatically slip or disengage the clutch at a predetermined torque.

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Engineering Web: Mechanical Clutches

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Part Numbers for Mechanical Clutches

Part # Distributor Manufacturer Product Category Description
2HLH3 Grainger Industrial Supply DANAHER TOOL Engine Specialty Tools Clutch Alignmnet Kit
1MZW3 Grainger Industrial Supply GRAINGER INTERNATIONAL INC. Heavy Duty Truck Tools Adjusting Wrench, Clutch
1MZW4 Grainger Industrial Supply GRAINGER INTERNATIONAL INC. Heavy Duty Truck Tools Clutch Aligning Tool, 10 Spline
2ZPL7 Grainger Industrial Supply DANAHER TOOL Engine Specialty Tools Fan Clutch Set,Number of Pieces 3
1YMH3 Grainger Industrial Supply GRAINGER INTERNATIONAL INC. Heating and Cooling Tools Camshaft Holder Set,Pulley/Fan Clutch

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