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Bearing Heaters

Acorn Industrial Services supplies bearing heaters for safe, controlled and efficient heating of bearings before mounting. A bearing heater helps expand the bearing bore evenly, making it easier to install bearings onto shafts without excessive force, impact damage or incorrect fitting.

We offer a range of bearing heaters from popular brands like SKF, to accommodate bearings with bore sizes from 20 mm up to 800 mm, and up to 1200 kg in weight.

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SKF TWIM 15 portable induction heater shown heating a bearing
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Buy Bearing Heaters Online from Acorn Industrial Services

A bearing heater is used to heat bearings before installation, allowing the inner ring to expand so the bearing can be mounted correctly onto a shaft. This method helps reduce the risk of damage caused by hammering, direct flame heating or uneven temperature distribution.

At Acorn Industrial Services, we supply bearing heaters and induction heaters for maintenance, repair, overhaul, engineering and production environments. These tools are commonly used by maintenance engineers, workshops, manufacturing sites and industrial service teams to support correct bearing installation and improve reliability.

 

Induction Heaters for Bearings

An induction heater uses electromagnetic induction to heat metal components quickly, evenly and efficiently. Induction heating is widely used for bearing mounting because it provides controlled heat without direct flame contact.

Benefits of using an induction heater include:

  • Fast and efficient heating
  • Controlled temperature settings
  • Even heat distribution
  • Reduced risk of bearing damage
  • Safer alternative to flame heating
  • Cleaner maintenance process
  • Suitable for repeat bearing installation tasks

What are the benefits of using a bearing heater to mount a bearing?

The benefits of using a bearing heater to mount a bearing include: 

Ensure consistent temperature

Bearing heaters ensure that bearings are heated evenly, guaranteeing a consistent temperature throughout the bearing. This helps to prevent bearing and seal damage during fitting. 

Improved worker safety

When used correctly, bearing heaters can greatly improve worker safety, when compared to other fitting methods using heat, such as the use of naked flames or oil baths. 

Increased productivity

Bearing heaters are a fast and efficient method of heating a bearing, helping to reduce downtime and labour costs during fitting. 

Enhanced service life

When compared to methods such as brute force, using a bearing heater can greatly enhance service life. This is because the chance of the bearing and other surrounding components incurring damage during the fitting process is greatly reduced. 

 

Choosing the Right Bearing Heater

Choosing the correct bearing heater depends on the size, weight and type of components being heated, as well as the frequency of use and required temperature control.

Key factors to consider include:

  • Maximum bearing bore diameter
  • Maximum bearing outside diameter
  • Maximum component weight
  • Heating temperature range
  • Heating speed
  • Portability
  • Power supply
  • Yoke size options
  • Temperature probe availability
  • Automatic demagnetisation
  • Workshop or field use
  • Frequency of maintenance tasks

If you are unsure which bearing heater or induction heater is suitable, Acorn can help recommend the right tool based on your bearing sizes, applications and maintenance requirements.

Bearing Heaters FAQs

What are bearing heaters used for?

Bearing heaters play a key role in building and maintaining power transmissions, and allow you to install bearings without excessive force, which may damage them.

Bearing heaters are also used for shrink rings, gears, bushings and pulleys, but the heated part must form a closed electrical circuit.

What types of bearing heaters are there?

The types of bearing heaters include:

Induction coil bearing heaters - Induction coil bearing heaters are widely available and most commonly used. They use an interference fit mounting to evenly distribute heat to the bearing.

These heaters are suitable for bearings of up to 4.5kg, and can be incredibly helpful due to their portability. Due to the coil sitting on the outside of the heater component, they are also very energy efficient, and heating periods may be greatly reduced.

Hot Plate Bearing Heaters - Typically used for smaller bearings and other related parts, this bearing heater has a flat plate, which heats the bearing up to the desired temperature. These bearing heaters are ideal for heating bearings in one spot, and can reach temperatures of up to 200 degrees.

Cone Style Bearing Heaters - These heater types are designed to manage a range of bearing sizes, transferring heat from the cone to the inner ring of the bearing.

Can I buy a bearing heater online?

Yes. Bearing heaters and induction heater options can be purchased online from Acorn Industrial Services, with products available for industrial maintenance, engineering and workshop applications.

What is a bearing heater?

A bearing heater is a tool used to heat bearings before installation. Heating expands the bearing bore, allowing the bearing to be mounted onto a shaft more easily and reducing the risk of installation damage.

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