SKF
Heaters for Mounting and Dismounting
SKF heaters for mounting are induction-based devices that heat a bearing or other ring-shaped metal component uniformly and cleanly to expand it for easy installation onto a shaft. Induction heating is the preferred method because it is fast, temperature-controllable, and does not contaminate the bearing with oil or combustion by-products. SKF’s induction heater range spans from portable units for small bearings (up to 40 kg) to large, trolley-mounted heaters for bearings weighing hundreds of kilograms, suitable for railway axle bearings, wind turbine bearings, and large mill bearings. The heaters feature demagnetisation cycles and temperature probes to prevent overheating, which could alter bearing metallurgy. By using an SKF induction heater, the mounting process is safe, clean, and repeatable, extending bearing life by ensuring correct fit without physical force or thermal damage.
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Uniform, Rapid Heating
Induction heats the entire ring evenly, avoiding hot spots.
Precise Temperature Control
Avoids exceeding the bearing’s maximum heating temperature (typically 120°C).
Clean Process
No oil, no flame, no smoke — keeps the bearing and workshop clean.
Demagnetisation Cycle
Ensures the bearing is magnetically neutral after heating, preventing metallic debris attraction.
Wide Size Range
Heaters from compact to large floor-standing for multi-tonne bearings.
Safer than Oil Baths
Eliminates fire risk and hazardous oil handling.
Choosing the Right SKF Induction Heater Size
SKF induction heaters are selected based on the bearing weight and outer diameter. The TIH series ranges from the TIH 030m (max 40 kg bearing) to the TIH 220m (max 300 kg). Heating time is rapid: a 100 kg bearing reaches 110°C in under 15 minutes. Matching the heater to the bearing size ensures efficient energy use and optimal workflow.
Mounting Bearings Using the Heat Expansion Method
The bearing is heated on the induction heater to approximately 80-110°C above shaft temperature. The expanded bore slides easily onto the shaft without force. As it cools, it contracts to form a tight interference fit. This is the easiest, cleanest, and safest method for mounting bearings with cylindrical bores and interference fits, and it protects both the shaft and bearing from installation damage.