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Industrial Electromagnetic (E.M.) Clutches

Electromagnetic clutches also called ‘electromechanical’ or ‘E.M.’ clutches, actuate electrically but transmit torque mechanically. The basic design of an E.M. clutch consists of three parts: an electromagnetic coil within a metal housing (stator), a rotor connecting to the input shaft, and an armature that connects to the output shaft, sprocket, or pulley.  

Electronic and Electromechanical Clutch Options

Miki Pulley offers several electronic clutch and electromagnetic brake options to meet your application requirements. The following electromagnetic and electrically actuated clutch and brake options can be customized to your application-specific needs.

Electrically Actuated Clutches

Electrically Actuated (E.M.) Clutches have the same basic design as the Micro Clutches but are larger in size.  The stator coil produces an electromagnetic field to mechanically engage the armature and rotor. This highly versatile clutch style is ideal for automated gates, paper processing equipment, printing machines, factory automation, and more.

We offer electrically actuated E.M. clutches in a wide range of sizes, with transmittable torque ranging from 5Nm to 320Nm. Flange and shaft mount configurations are also available, with operational temperatures ranging from 14°F to 104°F.  (-10°C to 40°C). This style provides a zero-backlash connection.

Electromagnetic Micro-Clutches

Electromagnetic Micro-Clutches feature the same smooth operation and design as our standard E.M. clutches but are sized for smaller precision equipment such as office copying equipment, packaging systems, and sorting machines.

E.M. Micro-Clutches are available with flange-mounted and shaft mounting options.
We offer torque ranges of up to 2.4Nm, and operational temperatures ranging from 14°F to 104°F.  (-10°C to 40°C).  This style provides a zero-backlash connection.

Electromagnetic Tooth Clutches

Electromagnetic Tooth Clutches feature interlocking teeth that provide more precise timing and positioning, plus the transmission of higher torque than friction-based electric clutches. Tooth Clutches are an excellent choice for multi-station machinery and can be used in either wet (oil) or dry operating conditions.

Miki Pulley provides full random position or single position engagement tooth clutches in eight sizes and six tooth profiles to meet your specific performance requirements.  Our electromagnetic tooth clutches have torque ratings of up to 2200Nm and are unitized with built-in bearings for fast and easy through-shaft mounting. An integrated coupling option is available for applications that require the clutch to connect to another inline shaft.
Electromagnetic Clutch / Brake Combination Units provide engineers with a turnkey solution for complex mechanical applications. This clutch/brake device is used where the output needs to be engaged, disengaged, and halted.  Our combo units provide up to 320 Nm of transmittable torque and are available in six different models, including clutch/brake, double-clutch, or double brake configurations.  

Electromechanical Clutch Sorting & Packing Applications

Intermittent cycling of the clutch can also be accomplished by interrupting and re-applying the electrical current at specified intervals. Electromagnetic clutches typically provide a zero-backlash connection and are well-suited for general industrial operating environments.
Electronic Clutches are used in a variety of Sorting and Packaging applications, including: 
  • Food Processing Equipment
  • Packaging Machinery
  • Conveyor Drives
  • Printing and Copy Machines
  • Automated Manufacturing and Assembly

Electromagnetic Clutch Engagement

The coil is energized to engage an E.M. clutch, creating a magnetic field that pulls the armature friction plate to the rotor friction plate, establishing a frictional mechanical connection.  The force between the friction surfaces transmits torque from the input rotor to the output armature.  A variation to the friction disc design is a toothed design for timing/position control and higher torque applications.

Electromagnetic Clutch Disengagement

To disengage the E.M. clutch, the electrical power source is shut off.  The armature is pulled back into its default position with no magnetic field present by a recessed flat spring.   This action creates a small air gap between the rotor and armature plates, effectively disengaging the output armature and ceasing torque transmission.

Request a Quote for Electromagnetic Clutch Brakes in a range of Sizes and Styles

Miki Pulley offers several electronic clutch and electromagnetic brake options to meet your application requirements. Request a quote today or contact us to request additional information.