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Electric Clutches

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About Electric Clutches

Electric clutches are equipment drive assemblies that contain electrically 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. Electric clutches permit faster cycling times than pneumatic or hydraulic clutches, but do not provide the same range of torque. They are best suited for automatic machinery that transmits control commands as electric signals rather than as pedal or lever motions. Electric clutches are also useful in applications where the clutch is so far removed from the control point that mechanical connections or pneumatic or hydraulic piping would be difficult to maintain or prohibitively expensive.

Specifications for electric clutches include torque rating, power, rotational speed, and operating voltage. 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 Electric 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 Brakes
Electric brakes are assemblies consisting of electrical elements for the slowing or stopping of shafts in equipment drives. Electrical power is required to activate the brake.
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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Part Numbers for Electric Clutches

Part # Distributor Manufacturer Product Category Description
4LF84 Grainger Industrial Supply BLACK & DECKER Electric Screwdrivers Versa Clutch Screwdriver 2000,6.5 A
4LF93 Grainger Industrial Supply BLACK & DECKER Electric Screwdrivers Positive Clutch Screwdriver,RPM 2500,6.5
4LF87 Grainger Industrial Supply BLACK & DECKER Electric Screwdrivers Versa Clutch Screwdriver 1000,6.5 A
4LF91 Grainger Industrial Supply BLACK & DECKER Electric Screwdrivers Positive Clutch Screwdriver,RPM 2500,6.5
3GRF4 Grainger Industrial Supply BLACK & DECKER Electric Drills Stud & Joist Drill,1/2,VSR W/Clutch,11A

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