Magnetic Couplings

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Magnetic couplings are shaft couplings that use a magnetic field instead of a physical mechanical connection to transmit torque from one shaft to another. They are non-contact and utilize attraction and repulsion of the magnetic poles to transmit rotational power. Magnetic couplers tolerate large misalignments and produce no noise, vibration or thermal conduction.

Non-contact synchronous couplings have a softer start and stop function than most standard couplings and can be used as a torque limiting device since there are no mechanically engaged parts. They can be used in a linear or rotary configuration and are suitable for use in wet or harsh environments. Magnetic couplings are a common choice for mechanical applications including transmissions, pumps, compressors and assembly systems.

The design and performance of permanent magnetic shaft couplings from Miki Pulley allows for zero wear and dust generation and the configurations are versatile for use in various engagement angles and installations. You can also adjust the maximum transmittable torque by increasing or decreasing the distance between the two hubs. Additional features and benefits include:

  • Provides high flexibility
  • Absorbs vibration and impact
  • Torque ranging from 2.66 in-lbs. to 1610 in-lbs. (0.3 Nm to 182 Nm)
  • Bore sizes range from 0.325” to 2.16” (8mm to 55mm)

Miki Pulley offers magnetic shaft couplings in four styles to meet your requirements. Request a quote for non-contact couplings or contact us to discuss which option is best for your application.


CP Series

CP Series

CO Series

CO Series

MP Series

MP Series

ML Series

ML Series

Magnetic Coupling Options

Non-contact shaft couplings from Miki Pulley feature neodymium magnets and inner and outer drives that do not touch. They do not experience any wear and are a maintenance-free solution for linear and rotary shaft coupling applications.

Our permanent magnetic coupling options are as follows:

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CP Series Magnetic Couplings

The CP Series has a basic butt shaft structure and provides easy attachment, detachment and centering.

  • Maximum transmission torque: 15.79Nm
  • Bore size range: 0.315” ~0.590” (8mm~15mm)
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CO Series Magnetic Couplings

Features a parallel shaft structure and provides easy attachment and detachment.

  • Maximum transmission torque: 0.610Nm
  • Bore size range: 0.472” ~ 0.591” (12mm~15mm)
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MP Series Magnetic Couplings

The MP Series has an orthogonal axis miter structure and is adaptable to narrow pitches. Can be used in cylinder-to-cylinder, cylinder-to-disc or disc-to-disc configurations.

  • Maximum transmission torque: 0.623Nm
  • Bore size ranges: 0.394” ~ 0.984” (10mm~25mm)
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ML Series Magnetic Couplings

The ML Series coupling features an orthogonal axis miter structure that is compact and adjustable to narrow pitches.

  • Maximum transmission torque: 0.195Nm
  • Bore size ranges: 0.315” ~ 0.591” (8mm~15mm)
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[Specifications and Dimensions]
Prospine coupling - Miki Pulley

Set Model Transmission torque [N・m](at.20℃) Reference diagram A [mm] B [mm] C [mm] D [mm] E [mm] F [mm] G [mm] K [mm] M nominal Set mass[kg]
Air gap
1mm 5mm 10mm
CP1010-02-SF * 0.03 - - image1 10 4 10 3 - - - - M2.5 0.01
CP2020-08-SF 0.326 0.032 0.003 image1 20 8 14 10 - - - - M4 0.06
CP2525-08-SF 0.741 0.113 0.014 image1 25 10 19 12 - - - - M4 0.12
CP3030-08-SF 1.397 0.287 0.045 image1 30 12 19 14 - - - - M4 0.17
CP3535-08-SF 2.259 0.579 0.114 image2 35 12 24 16 - - - - M4 0.29
CP4040-08-SF 3.580 1.067 0.249 image2 40 12 24 16 - - - - M4 0.41
CP5050-08-SF 6.577 2.502 0.766 image3 50 12 24 20 14 9 30 4 M4 0.50
CP6060-08-SF 10.124 4.565 1.680 image3 60 15 29 26 14 9 40 5 M5 0.70
CP7070-08-SF 15.790 7.533 3.187 image3 70 15 29 26 14 9 40 5 M5 0.92


Advantages of Using Magnetic Couplings

Magnetic couplings from Miki Pulley absorb vibration and impact and transmit torque ranging from 2.66 in-lbs. to 1610 in-lbs. (0.3 Nm to 182 Nm) depending on the coupling you select. Our synchronous shaft couplings are easy to adjust and designed to deliver high performance. They may also transmit torque through non-ferrous walls, enabling motor isolation.

Features and benefits of magnetic shaft couplings include:

  • Non-contact design for wear-free, maintenance-free operation
  • Quiet operation
  • Ability to tolerate large misalignments
  • Easy to install and disassemble
  • Ideal for torque limiting applications
  • Performs in wet environments or where chemicals are present

Request a Quote for Magnetic Couplings

Miki Pulley provides a wide range of shaft couplings to meet your application requirements. Request a quote for magnetic couplings today or contact us for more information.