An industrial induction heater heats conductive metal components using electromagnetic fields — with no flame, no oil, and no physical contact. In bearing maintenance and installation, it's used specifically to:

• Expand bearing inner rings for damage-free shaft fitting
• Reduce installation force and eliminate hammer fitting damage
• Ensure uniform, controlled heating without hot spots
• Enable safe, repeatable bearing mounting across maintenance teams

It's the industry-standard method recommended by all major bearing manufacturers including SKF, FAG, NSK, and Timken.

A bearing induction heater works on the principle of electromagnetic induction. When the bearing (or any ferrous metal component) is placed on the heater's magnetized yoke or spindle, an alternating current induces eddy currents within the metal, generating heat from within the component itself.

The process in 4 steps:

1. Mount the bearing on the heater's yoke or over the spindle
2. Set the target temperature (typically 80°C–120°C above ambient)
3. The unit heats the bearing evenly — no hot spots, no uneven expansion
4. Once at temperature, the bearing slides onto the shaft — no force required

After cooling, it contracts to a perfect interference fit. This method dramatically extends bearing life compared to cold pressing or oil bath heating.

Each model in our bearing heater range is optimized for a different bearing size and weight:

Selection tip: Match the model to your largest regularly-used bearing. If you work with a wide range, the EHML:25/40 gives you the most flexibility. Ask our team for a recommendation.

Yes. All Vivid Metrawatt bearing induction heaters include automatic temperature control with thermal cutoff. The unit:

• Heats the bearing to your pre-set target temperature
• Automatically shuts off once the temperature is reached
• Holds the temperature briefly to allow safe handling

This is critical for bearings — overheating beyond the steel's tempering temperature (typically 125°C for standard bearings) can permanently reduce hardness and drastically shorten bearing life. Automatic control eliminates this risk entirely.

Induction heating is the safest method for bearing mounting available today. Compared to oil baths and flame heating:

• No fire risk — zero open flame involved
• No burn hazard from hot oil — cleaner, safer workshop environment
• Automatic demagnetization — built into the unit; removes residual magnetism that would otherwise attract metal particles and damage the bearing in operation
• Exterior stays cool — only the workpiece heats, not the casing
• Automatic shutoff — prevents runaway heating

Standard PPE (heat-resistant gloves, safety footwear) is still required when handling heated components.

Yes. While these units are optimized for bearing installation, they work effectively on any ferrous metal component with a similar geometry:

• Inner gear rings and bushings
• Coupling hubs and sprockets
• Pulleys and sheaves
• Sleeves and locking rings

If the component has a bore that can seat on the heater's yoke or spindle, it can typically be heated. For irregularly shaped components or very large parts, our industrial induction heater range (22kW–44kW) may be more suitable.

Our bearing heaters are used by maintenance teams across:

• Steel plants — rolling mill bearing changes
• Cement industry — kiln and crusher bearing maintenance
• Mining — conveyor, crusher, and pump bearing installation
• Railways — axle and wheel bearing mounting
• Power plants — turbine and generator bearing overhauls
• Automotive manufacturing — assembly line bearing press fits
• Paper & pulp mills — dryer and roller bearing maintenance
• Wind farms — main bearing and gearbox bearing installation

Any facility running rotating equipment benefits from having a dedicated bearing induction heater in their maintenance toolkit.

Yes. If your bearing sizes or application requirements fall outside our standard range — or if you need a fleet of units for a large plant — we're equipped to help. We assist with:

• Application-specific model selection based on your bearing inventory
• Bulk procurement for multi-plant or turnkey projects
• On-site demonstrations for maintenance teams
• Technical support and training for in-house use

Reach out to our team with your bearing dimensions and we'll recommend the right fit.