• Can be used to couple across a thin barrier, making a perfectly hermetically sealed rotary feedthrough
• No contact, so no wear
• Serves as a wear-free slip clutch - under overload, the magnetic coupling simply slips to the next position. In the MXC OEP magnetic couplings, this slip is exactly 90 degrees.

Disadvantages:

• Moderate radial loads on support bearings, proportional to misalignment
• Substantial axial load on bearings from magnetic attraction; inversely proportional to separation between the two hubs, and therefore directly proportional to the static break torque
• Useful only for very light torques, and applications with either gradual starts, or very low rotational inertia of the driven side of the system
• Relatively large in diameter, considering light coupling torque