Railway Induction Heating Systems
Advanced induction heating solutions for maintenance, repair and manufacturing operations across the railway industry.
Bolt Expansion System
Induction heating is a fast, controlled and highly efficient method for expanding bolts in steam and gas turbines. A specially designed induction coil is inserted directly into the bolt, generating localized heat that expands the bolt by a precise predetermined amount, enabling easy removal of the nut without damaging the threads.
Because the heating process is extremely rapid, heat does not migrate to the thread area, preventing thread damage and eliminating the risk of rods melting inside the bolt—an issue often seen with resistance or flame heating. Operators can pre-set key parameters such as temperature, ramp-up time and dwell time, ensuring repeatable and consistent bolt expansion quality.
the Minac 25/40 Twin, which features two independent handheld transformers powered by one compact converter. This enables a single operator to heat two bolts simultaneously, effectively doubling productivity.
- • Rapid, precisely controlled bolt expansion
- • Prevents thread damage due to localized heating
- • Eliminates rod-melting issues common in flame/resistance heating
- • Pre-programmable temperature, ramp-up and dwell settings
- • Quick-release, specially shaped coils for different bolt geometries
- • Angle adapters for fast coil insertion
- • Mobile Minac systems with up to 10 m flexible cables
- • Minac Twin version allows simultaneous two-bolt heating
- • Compact and hoist-friendly design for scaffolding and elevated work
- • Up to 50% faster than flame or resistance heating
- • Safer operation with no open flames or overheated rods
- • Higher maintenance efficiency and reduced downtime
- • Improved bolt integrity and consistent repeatability
- • Increased productivity with Twin systems
- • Suitable for tight maintenance windows in turbines
- • Bolt expansion in steam and gas turbines
- • Bolt loosening in heavy industrial equipment
- • Maintenance tasks requiring controlled, localized heating
- • Power plants and turbine overhaul environments
- • Petrochemical and processing facilities
Other Products From ENRX
Induction Brazing System
A comprehensive induction brazing technology offering fast, precise, clean and repeatable joining for a wide range of metals and industrial
Shrink-Fitting System – Electrical Motors & Pumps
Induction heating system designed for fast, precise and safe shrink‑fitting of bearings, rotors, impellers, and pump components.
Coating Removal System
An induction heating system designed for fast, clean, and safe removal of paint and industrial coatings, reducing stripping time by