Magnetic Bearings

Magnetic bearings are contact-free supports that suspend a rotating shaft using controlled magnetic forces. Active systems combine electromagnets, position sensors and a controller, while passive elements may assist the magnetic circuit, enabling clean, low-wear rotation in specialised high-speed or low-vibration machinery.

Key facts

Family: Bearings
Common types: Active radial bearing, Active axial bearing, Hybrid magnetic bearing, Passive magnetic support, Backup bearing assembly
Materials: Laminated electrical steel, Copper windings, Permanent magnet alloy, Engineering polymer insulation, Bearing steel backup rings
Used in: High-speed compressors, Vacuum pumps, Turbomachinery, Flywheel systems, Clean-process equipment

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Types

Active radial bearing
Active axial bearing
Hybrid magnetic bearing
Passive magnetic support
Backup bearing assembly

Materials

Applications

High-speed compressors
Vacuum pumps
Turbomachinery
Flywheel systems
Clean-process equipment

What to send for a quote

shaft geometry
radial and axial loads
speed range
control and sensor requirements
machine environment

Questions about magnetic bearings

What should I send to identify magnetic bearings?

Send shaft geometry, radial and axial loads, speed range, control and sensor requirements, machine environment. Provide machine and control architecture details because magnetic bearing components are not selected by boundary dimensions alone. A clear photograph, drawing or readable reference can resolve details that dimensions alone do not show.

How should I select magnetic bearings?

Treat the bearing, sensors, controller, power supply and backup bearings as one engineered system matched to rotor dynamics. Confirm the mating parts and operating environment before ordering, since an apparently similar size can use a different profile, material or internal arrangement.

Last updated: 2026-10-08