ENRX induction heat treatment system hardening a steering‑rack shaft with precise localized heating
Induction Heating
HardLine – Industrial Heat Treatment Systems
A comprehensive family of induction heat treatment systems for surface and through hardening, ranging from small manual units to large, automated turnkey plants.
Manufactured byENRX
Surface+ through hardening
1/1000 sController reaction
SINACHeat generators
Overview
Induction hardening systems
HardLine is ENRX Induction’s family of advanced industrial heat treatment systems designed for both surface and through hardening applications. The range includes vertical machines, horizontal centerless systems, rotary table solutions, and fully customized hardening installations. These systems cover a wide variety of components such as gears, camshafts, crankshafts, drive shafts, torsion bars, couplings, rock drills, brake discs, CV joints, shock absorbers, bearings, and many more.
All HardLine machines are powered by ENRX high-efficiency SINAC frequency converters, delivering optimal hardening results and process stability. The systems are engineered for seamless in-line integration, reduced footprint, fast setup, minimal downtime, and high-speed hardening through advanced motion controls, IoT-based diagnostics, and precise metallurgical outcomes.
Custom-engineered systems are a major part of the HardLine offering—ENRX provides specialized laser hardening, drum (Trunnion) systems, and multi-zone hardening/tempering solutions, along with comprehensive global service, simulation support, operator training, and preventive maintenance programs.
Applications
Where HardLine is used
Industrial induction hardening of a wide range of components, including:
Developing customized hardening solutions is an ENRX specialty
Gears, camshafts, crankshafts
Drive shafts, torsion bars, axles
Brake discs, steering racks, CV joints
Suspensions, rock drills, couplings, clutches
Inner/outer races, valves, output shafts
Customized parts requiring multi-zone hardening/tempering
Suitable for small to large-scale mass production environments.
Features
Machine range and controls
- Powered by SINAC heat generators for optimal hardening output
- Full range of systems: vertical, centerless, rotary table, crankshaft, custom-engineered
- High-speed controllers with reaction time down to 1/1000 sec
- Modular, scalable designs with small installation footprint
- In-line integration capability for high-volume production
- Automated handling options: robots, conveyors, walking beams
- Quick setup/changeover, easy maintenance and ergonomic design
- Multiple hardening and tempering zones available
- Global service network and simulation/testing support
Benefits
Short cycles, repeatable depth
Higher productivity with short cycle times and reproducible results
Improved metallurgical quality and reliable hardening depth
Lower downtime thanks to modular components and advanced diagnostics
Reduced operating cost via efficient SINAC converters
Seamless integration into automated production lines
Flexible for virtually all part geometries and production volumes
Backed by global service, maintenance programs, and operator training
Need support with this product?
Share your application and process requirements, and our Thermal Process Solutions team will support you with the suitable product information.
Other Products in Induction Heating
Explore other products available within the same product category and open each page for complete technical details.
Sinac® – Stationary Induction Heating Systems
A stationary induction heating system delivering precise, contactless, efficient and repeatable heat for a wide range of industrial applications.
Weldac – High-Output Solid-State Tub & Pipe Welders
A complete family of high-output solid-state induction welders for tube and pipe production, delivering high efficiency, compact design, and minimal operator intervention.
MINAC – Mobile Induction Heating Systems – all-in-one-solution
A fully digital, mobile, flexible induction heating system equipped for Industry 4.0, offering precise, efficient heating for a wide range of applications.
Ventac – Portable Air-Cooled Induction Heating System
A compact, portable, air-cooled induction heating system designed for preheating, post-weld heat treatment, and maintenance applications in shrink-fitting and demanding industrial environments.
HardLine M – Modular Vertical Hardening Machine
A new-generation modular vertical induction hardening system offering maximum flexibility, Industry 4.0 readiness, and suitability for a wide range of hardening and tempering applications.
Wire and Cable Heating Systems
High-efficiency in-line induction heating systems for structural wires, cables, conductors, and optical fiber production.
Induction Bonding System
A high-precision induction bonding system used for curing adhesives and sealants in automotive aluminium and steel panel assemblies.
Induction Heating Coils
A new-generation modular vertical induction hardening system offering maximum flexibility, Industry 4.0 readiness, and suitability for a wide range of hardening and tempering applications.
Tube Welding Consumables
A comprehensive range of high-performance consumables for high-frequency tube, pipe, and profile welding applications.
TERAC 25/40 – Deck and Bulkhead Straightening System
A turnkey induction heating system designed for shipyards, ideal for straightening steel decks and bulkheads with high productivity, low cost, and safe operation.
Shrink-Fitting System – Electrical Motors & Pumps
Induction heating system designed for fast, precise and safe shrink-fitting of bearings, rotors, impellers, and pump components.
Seam Normalizing Systems
Induction-based seam normalizing systems designed for longitudinally welded pipes, providing precise, controllable and efficient heat treatment for oil and gas pipe production.
Railway Induction Heating Systems
Advanced induction heating solutions for maintenance, repair and manufacturing operations across the railway industry.
Induction Metal Melting Furnaces – FIB / DAB / FIM / LAB / FAR
Induction furnaces designed for clean, efficient, and precise melting of ferrous and non-ferrous metals, suitable for small to mid-size foundries and laboratories.
Induction Brazing System
A comprehensive induction brazing technology offering fast, precise, clean and repeatable joining for a wide range of metals and industrial applications.
Induction Brazing System for Short-Circuit Rings
A high-precision induction brazing solution designed to braze short-circuit rings with minimal heat input, high accuracy and outstanding joint quality.
Induction Brazing System for Faucets
A high-precision, flame-free induction brazing solution designed to deliver efficient, repeatable and aesthetically clean brazed joints for faucet manufacturing.
HardLine – Vertical Heat Treatment Machines (VS / VM / VL / VXL)
A range of vertical induction heat treatment machines designed for small to very large components, featuring CNC control, modular design, and high productivity.
HardLine Horizontal Heat Treatment Machines – HC / HP / HH Series
High-productivity, modular horizontal induction heat treatment systems designed for bars and shafts, offering continuous, pusher, and hybrid machine configurations.
Coating Removal System
An induction heating system designed for fast, clean, and safe removal of paint and industrial coatings, reducing stripping time by up to 90% compared to traditional methods.
Chain Heat Treatment System
An in-line induction hardening and tempering system designed to produce premium-grade industrial chain with high speed, precision and consistency.
Bolt Expansion System
An induction-based system for fast, safe and precise expansion of bolts used in turbines and heavy-duty assemblies.
Billet Heating Systems
Induction billet heating systems are designed to rapidly and efficiently heat billets of various metals before forging.
Bar End & Partial Heating Systems – CBB (Horizontal) & CHV (Vertical)
Induction heating systems are designed for bar end and partial heating with high speed, precision, and automation capability.