The original and unique additive manufacturing coils based on Electron Beam Melting (EBM) made of pure copper. 

Such technology commonly called “3D printing” simplifies and shortens the manufacturing process with direct manufacturing from CAD design with extreme density material. This technology is deployed in other industries such as aerospace and orthopaedic implants using titanium or Cobalt-Chrome materials where achieving the material properties is crucial.

The method is composed of several phases where the objective is to guarantee the inductor quality using 3D printing technology.

When the coil has been printed previously
The process is the same except the first phase that is not necessary because it is registered from the first application. Repeat coils can be reproduced quickly and with total accuracy.

GH 3D INDUCTOR for tulip hardening with external and internal quenches
3d inductor manufacturing diagram
3d printing coils, inductors diagram

The EBM Printing process


The coils are built up, layer-by-layer of metal powder, melted by a powerful electron beam. Each layer is melted to the exact geometry as defined by a 3D CAD model.


First a thin layer of metal powder particles is deposited in the working plate and then flattened.  Powder is preheated to very high temperatures.


In the next step the electron beam is focused and controlled in the X-Y dimension by means of an electromagnetic coil in order to selectively melt the powder particles on top of the working plate.


The result is the creation of the desired section and simultaneously it is fused to the previous layer. A new layer is then created, and the steps are repeated up to the completion of coil .

Optionally the coil surface could be improved with sand shot blasting, classical manual finishing or through mechanical post-processes.

GH EBM Working plate

Working plate with pure copper 3D printed coils

EBM printer basic diagram

Scheme of main blocks in EBM machine

GH 3DP coil for slewing bearing teeth

Technical advantages

In comparison of other 3D printing techniques.

Material purity

The base material is 99.99% copper with higher purity than any electrolytic copper tube available on the market.
No additional elements. 

Faster fabrication

The high energy density used for melting, allows less time to melt each layer, making this method faster than other additive fabrication methods..

Guaranteed no porosity or oxide

in the manufacture thanks to the vacuum atmosphere.

Very high mechanical performance

Melted material is preheated giving extremely mechanical properties compared with other additive technologies.

Reduction of internal stress

The uniform thermal environment ensures printed inductors are free of internal stresses.

Reactive materials

High chemical purity means greater conductive performances.

65% energy conversion efficiency

Most of the energy used by the beam is absorbed by copper. Greater efficiency than other 3D printing technologies.


Most of the metal powder particles (97%) that has not been used in the process can be recovered and used again.

Customer cases

In-field coils examples
Full adaptation to complex parts and extreme long service life, up to 400% more in some cases, are the main benefits.




GH 3D printed coil for crankshaft hardening.
GH Induction hardening of automotive crankshafts.


Inner Race
Outer Race

GH 3D printed coil for hub and spindle hardening.
GH Induction hardening of automotive hub & spindle part.


Ball Outer race
Inner Race

GH 3D printed coil for ball outer race in driveline
GH Induction hardening of automotive ball outer race stem



GH 3D printed coil for slewing bearing teeth.
GH induction hardening of slewing bearing teeth


Complex geometry

GH 3D printed coil for housing rods
GH Rotative inductor - Making the hardening simple
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