Magnetic couplings from Miki Pulley are ideal for machine designs involving food, pharmaceutical, and laboratory applications requiring a clean, non-contact connection between motor and shafts.
The mechanically isolated magnetic coupling transmits torque through the air. This occurs through both input and output hubs of the coupling which contain powerful rare-earth neodymium magnets. These magnets create a magnetic field that transmits torque through plastic, glass, aluminum, and other minimally ferrous materials without physical engagement.
Miki Pulley’s Magnetic Coupling’s non-contact design is particularly important where cleanliness and motor isolation is required in the mixing system design. The coupling is clean and operates with no vibration. There is no dust, debris or mechanical wear using this coupling compared to conventional couplings. Also important, this coupling has a “softer” start/stop function compared to conventional, general-purpose couplings. In addition to mechanically isolating the connecting shafts and motor, the coupling also isolates thermal and electrical occurrences.
These magnetic couplings have an intended engineered torque limit at a specific air gap. The transmittable maximum torque may be adjusted by increasing/decreasing distance between coupling hubs. Depending on the model, size, and installed air-gap, the magnetic couplings’ maximum torque limit may be exceeded without mechanical damage. The hub simply slips to the next magnetic pole, without noise or mechanical wear.
Magnetic Coupling Also Acts As A Torque Limiter
While the magnetic field between the two hubs will transmit rotational force, it can also act as a torque limiter in an overload event. The transmittable-torque and slip-torque may be metered by adjusting the distance between the hubs. After slipping, the hubs will re-engage each other and continue to transmit torque. This feature produces no mechanical wear on components.
Miki Pulley Magnetic Couplings are available in different configurations including shaft-to-shaft, parallel cylinder, perpendicular, and well as stainless and plastic-clad versions for food/washdown environments.
Basic Miki Pulley Magnetic Coupling specifications are:
• 4 different models in multiple sizes available
• Torque: 2.66 to 1610 in-lbs. (0.3 Nm to 182 Nm)
• Bore size range: 8 – 55mm on butt shaft configurations
Filed Under: Coupling Tips