High‑speed train passing through a modern city where ENRX induction heating is used for maintenance of rolling stock and rail components

Induction shrink-fitting

Induction shrink-fitting is where we use thermal expansion to either fit or remove parts.

Induction heating explained

ENRX Ventac aircooled induction heating equipment used for shrink fitting job

What is induction shrink-fitting?

Induction shrink-fitting uses thermal expansion to fit or remove parts made of metal. By employing controlled heating, this method takes advantage of the expansion and contraction of materials, ensuring a precise and secure assembly or disassembly process.

ENRX induction‑heated bearing ring being shrink‑fitted onto a shaft during maintenance

What are the benefits?

Process controllability, consistency and speed
Accurate heat reduces the risk of ovality and is energy efficient
Precise control of ramp-up times and holding temperatures

Electric vehicle battery pack and e‑motor assembly where ENRX induction heating can be applied for hardening, bonding and shrink‑fitting processes

Where can it be used?

Our products are used in the automotive industry to shrink-fit gears, rings and motorhousing. They also play a critical role in maintaining and repairing aeroplanes, trains and trucks. Moreover, these products are employed in shrink-fitting tasks on offshore platforms and are increasingly used to remove giant nuts and bolts in power station turbines.

Induction heating equipment used for shrink fitting application in railway repair shop

What equipment is available?

We provide versatile shrink-fitting solutions with two mobile products, Minac and Ventac, offering flexibility for on-the-go operations. Our stationary heat generator system, Sinac, is customisable
for maximum efficiency, ensuring consistent and controlled heat for various shrink-fitting applications.

Solutions explained

Shrink-fitting redefined

ENRX shrink-fitting solutions use contactless induction heat for ultimate control and speed. From mobile to ultra-lightweight air-cooled systems—precision heating, anywhere you need it.
Service beyond installation

ENRX provides continuous support through coils, parts, maintenance and flexible service renting - ensuring maximum performance and uptime for your induction systems.
Minac: mobile induction heating

ENRX Minac brings all the benefits of induction—fast, focused, clean heating—into a portable system. From 6 to 220 kW, for repair, maintenance and production tasks on the go.
Sinac: built for performance

ENRX Sinac delivers high-frequency, high-precision induction heating for continuous operations. Built to heat, built to last. Even in the most demanding environments.
ENRX Ventac: the low weight is a heavy argument

Ventac is our ultra-compact, air-cooled induction heating system—no water, no compromise. It delivers portable, high-precision heating for shrink-fitting, pre-heating and post-heating in demanding industrial environments.

Insights and resources

Download brochures and expert materials on induction heating technologies and their industrial applications.

Induction heating a part to glowing red temperature

Induction heating applications | Processes, equipment and benefits

Discover how ENRX induction heating improves efficiency, precision, and sustainability across industrial applications — from brazing and bonding to forging and annealing. Learn about the processes, equipment, and benefits of modern induction technology.

Download brochure

A closer look at how it works

Ventac is a sustainable choice with its more than 97% efficiency – far better than any other air-cooled induction heating system.
Shrink fitting with flexible cable
Disassembling and shrink-fitting bearing and lock rings.
Bearing rings can be heated in a completely uniform manner and removed while the shaft remains cold.
The innovative ENRX shrink-fitting system can heat any size of motor housing for electrical motors and pumps.
More and more automotive sub-contractors are opting for induction heating to shrink-fit gear wheels
Induction heating used for changing the shafts of an old bridge
Disassembling and assembling of bearing rings at a railway repair shop.
Manual solution for shrink-fitting of motor house
Motor house: A fully automated system with robot handling.
Motor house: A semi-automated system with manual loading and unloading.
ENRX has delivered numerous solutions for shrink-fitting of stator housings.
Shrink-fitting of main shaft bearings and sleeve rings.
Shrink-fitting of rotor shaft and motor-housing
An operator replaces a bearing that has been heated with an ENRX mobile Minac system