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Hardening with induction heating

Hardening with induction heating

Hardening is one of EFD Induction's main application areas. Thousands of our hardening solutions are at work around the world—many of them within the automotive industry.


The main benefit of induction heating for hardening is that it takes just a few seconds. In a furnace, the same process can take hours or even days. How is that possible?


The answer is that induction is phenomenal at generating heat fast. This, in turn, means you can integrate hardening in the production process. Hardening in a furnace, on the other hand, is more time-consuming (greater heat loss) and requires moving the components either to your own furnace or to that of a sub-contractor.


In-line integration of hardening reduces your lead times considerably. You get full control over quality, delivery times and costs. There's no need to transport kilos of components back and forward, which saves energy and the environment. And last but not least, you cut down the amount of administration to a minimum.


Brochure :  Hardening with induction heating
Industrial heat processing equipment


Industrial heat treatment systems


HardLine is our range of stationary heat treatment systems for surface- and through-hardening. At the heart of each HardLine machine is an EFD Induction Sinac heat generator, the industry's most advanced induction frequency converter. These acclaimed converters help ensure optimum hardening results—day in day out, year after year.


The HardLine family includes vertical, horizontal centerless and customized machines—and serial and/or parallel compensated induction power sources with a wide range of output power and frequencies.


Product sheet :  HardLine
Minac 18/25 Twin


Mobile heat generators


The Minac range of complete mobile induction systems is even easier to use than its acclaimed predecessor.


A ready-to-use system, all that has to be done upon delivery is: 1) attach a coil, 2) connect supply voltage, 3) connect cooling water. In models with closed cooling systems, only the supply voltage needs connecting.


Once installed, the Minac's clear, menu-based and multi-language control panel ensures maximum ease-of-use. Moreover, this simplified control/user interface is common to all Minac equipment.


Many Minac models come in "Twin" versions offering two independent power outputs. The Twin versions feature split control panel displays—one for each power output.


The Minac is simple to operate. Handheld transformers (HHT) feature on/off and precise power controls. In fact, the HHT is as easy to operate as a regular electric drill. Flexible, water-cooled cables connecting the HHT to the converter allow easy access to workpieces.








Product sheet :  Minac


Universal heat generators


Choosing Sinac gives you more than the market's most advanced, most reliable induction heating systems. You also get easy access to EFD Induction’s global service, training and spare parts network. This network—which is made up of manufacturing plants, service centers and local representatives—means you are never far from qualified help and support.  


Opting for Sinac also ensures you get the best possible solution tailored to your specific needs and conditions. Prior to designing your system, our engineers, metallurgists and material experts assess your requirements. Testing and computer simulation at our labs guarantee you receive equipment which is optimized to your applications and which can be painlessly integrated into existing production lines and processes.      


Product sheet :  Sinac
Induction hardening - crankshaft

Induction hardening in the automotive industry

Few industries have benefited as much from induction hardening technology as the automotive sector. And few—if any—induction companies come close to matching our expertise in this key area.


Working closely with many of the world’s top automakers and auto suppliers, we have to date installed more than 2,000 induction hardening solutions in the following areas:

  • Induction hardening of engine parts such as valves, crankshafts, camshafts, connection rods and starter rings
  • Induction hardening of transmission parts, for example CV joints, tulips and axle shafts
  • Induction hardening of suspension parts such as shock absorber rods, springs and suspension arms
  • Induction hardening of parts for automatic and manual gear gearboxes, for example rings, selector shafts and sun gears
  • Induction hardening of clutch springs and brake pads

EFD Induction has spearheaded the development of advanced frequency converters. We also offer frequency converters that run at high and low frequencies simultaneously, known as the Multi Frequency Concept (MFC)—ideal for contour hardening of cogwheels and other complex geometries.

Induction hardening
What makes it so effective? More and more companies are opting for induction-based hardening solutions.
Seamless hardening. Why induction is the smarter choice. Seamless induction hardening is the proven cost-saving alternative to thermo-chemical processes.
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EFD Induction crankshaft hardening systems are a proven way to meet stringent specifications, while at the same time minimizing costs.
There are many reasons why induction heating is the preferred method for hardening camshafts.
An integrated induction hardening and tempering solution let you easily produce premium grade chain—a product that commands premium prices in international markets.
HardLine is EFD Induction’s family of heat treatment systems for surface- and through-hardening.
HardLine vertical hardening systems are available in four machine types, each one designed for a range of workpiece sizes: VS, VM, VL, VXL.
An introduction to the Centerless Pusher (CP) and Centerless Continuous (CC) systems.
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Crankshaft fillet hardening. Challenges and Prospects

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Induction Heating: A Guide to the Process and Its Benefits

Inductive spin hardening of gears

Induction hardening of crankshafts—how to meet even the toughest specifications

Optimizing the performance of vehicle components

Induction heating streamlines production processes

New hardening techniques

New nomographs for induction surface hardening of steel

Hardening techniques

Hardening of slewing rings

Chain hardening

Induction hardening of camshaft lobes

Die hardening with induction

Coating of brake disc

John Deere buys crankshaft hardening system from EFD Induction

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Induction hardening of brake shoe

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Induction hardening of crankshaft

Induction hardening complete steering racks, shafts and gear parts

The certificate awarded to EFD Induction Germany is the VDA 6.4

Induction hardening of heavy-duty hydraulic motors

Induction brazing and soldering the inlet caps and outlet pipes of fuel tanks

Induction hardening of camshafts and crankshafts

In-line heat treatment

Induction scanners for sun gears and shafts

EFD Induction chosen for heat treatment of balance shafts

EFD Induction scores breakthrough order with NSK

Major new technical article by EFD Induction experts

EFD Induction contributes to English-language edition of heat treatment book

EFD Induction expert published by leading steel industry group

EFD Induction to focus on core business—sells commercial heat treatment operation

EFD Induction lands Caterpillar hardening orders

EFD Induction wins series of chain hardening orders in China

Valve specialist Basso orders EFD Induction hardening system

Induction hardening of crankshaft
Hardening and tempering of crankshaft for engine.

Induction hardening of crankshaft
Hardening and tempering of crankshaft for engine.

Hardening of big rings
Induction hardening of big gear rings tooth by tooth.

Chain heat treatment
Induction hardening of chain. EFD Induction chain heat treatment systems are used by some of the world’s leading chain manufacturers.

Hardening of brake lever for trucks
Thousands of our hardening solutions are at work around the world—many of them within the automotive industry.