HardLine: Induction hardening machines
A complete range of stationary systems for all types of workpieces requiring hardening, tempering and annealing.
Introduction
HardLine is our family of heat treatment systems for surface and through hardening. It is a comprehensive, versatile range that includes induction hardening systems for every hardening job. HardLine includes vertical, horizontal centreless, rotary table, crankshaft, and customised machines. From small, manually loaded machines to large, automatic turnkey hardening plants complete with component handling, washing, straightening, and tempering capabilities.
Learn about how and where the HardLine family can be used
The HardLine family
Insights and resources
Download brochures and expert materials on induction heating solutions and their industrial applications.
HardLine M Modular Hardening Machine | ENRX Induction Heat Treatment Solutions
Discover the ENRX HardLine M modular vertical hardening machine – a flexible, cost-effective induction hardening solution designed for Industry 4.0 manufacturing. Built for reliability, scalability, and energy efficiency, HardLine M supports a wide range of workpieces and integrates advanced automation, real-time data monitoring, and smart connectivity for optimized performance.
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.
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Developing customized hardening solutions is an ENRX specialty. In fact, custom-engineered systems account for nearly half of our hardening machines.
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Induction hardening of slewing ring without soft zone.
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The VL machine is designed specifically for large and heavy components up to a maximum length of 2,000 mm and a weight of 600 kg. As with all HardLine vertical machines, the VL is compatible with CNC controls and robotic handling.
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The parallel loading/hardening capability of our rotary table machines makes them ideal for minimizing cycle times in high-volume production. Throughput rates can be further increased by adding extra stations.
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HardLine VXL is a hardening machine built specifically for very heavy and/or large parts. To let the machine handle large components, the VXL features a special, reinforced spindle and a high-power output carriage.
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Our versatile vertical machines cover everything from manually loaded to fully automated in-line systems.
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From small, manually loaded machines to large, automatic turnkey hardening plants complete with component handling, washing, straightening and tempering capabilities.
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For simple and complex geometries: HardLine includes vertical, horizontal centerless, rotary table, crankshaft and customized machines.
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Double hardening for double productivity. The quenching phase inside a single cabinet hardening machine with twin tailstocks and centres.
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Seamless induction hardening of large rings and gears.
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Gear tooth hardening. Advanced coil design and process control software ensure short cycle times and precise repeatability.
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HardLine heat treatment solutions for hardening of large rings and gears
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A programmable quenching cycle in work
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Induction is the cost-cutting alternative to furnace case hardening of small- and medium-sized gears.
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Quenching of a small gear that has been heated by the simultaneous multi-frequency method.
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A small gear that has been heated with a single frequency
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Induction hardening of steering rack
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Car crankshafts, truck crankshafts, marine crankshafts - ENRX systems are used worldwide to harden every imaginable type of crankshaft in a wide range of production volumes.
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An ENRX robot-type crankshaft hardening system in action. All our systems feature mechanical and control innovations that minimize Total Indicated Run-Out
