Induction Heating Since 2000

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Crankshaft Hardening

Induction hardening offers several advantages when applied to crankshafts in the automotive industry.


  • Wear Resistance: Induction hardening significantly increases the wear resistance of the crankshaft surface. This is crucial because crankshafts experience high tensile and torsion stresses during operation due to their length and peripheral speed. A hardened surface helps minimize wear and prolong the component’s life.
  • Controllability and Repeatability: Induction heating allows each crankshaft to be hardened with precision when integrated into production lines. The heat parameters can be fully adjusted, ensuring consistent results and repeatability.
  • Preservation of Core Properties: During induction hardening, the core of the crankshaft remains unaffected by the heat. This preservation of the core’s softness ensures that the crankshaft retains its tensile strength and torsion resistance.
  • Reduced Maintenance Costs: Induction-hardened crankshafts experience less wear, leading to reduced maintenance and replacement costs.
  • Improved Part Quality: The controlled and precise heating process results in a uniform hardness pattern across the crankshaft surface, enhancing overall part quality.
  • Space Savings: Induction hardening equipment has a small footprint, making it space-efficient for manufacturing facilities.

Induction hardening provides a cost-effective, precise, and reliable method for enhancing the performance and durability of crankshafts in automotive engines.

Crankshaft Hardening Machine

Crankshaft Hardening Machine
Crankshaft Hardening Machine

The characteristics of this set of crankshaft induction hardening equipment: it can realize rotational induction quenching of the spindle diameter, connecting rod diameter, oil seal flange, and curved teeth of a single-cylinder or multi-cylinder crankshaft.

Crankshaft cross-sections after heat treatment in our equipment

After surface induction hardening heat treatment, it can be seen that the crankshaft has formed a wear-resistant surface, significantly enhancing its durability and fatigue resistance. While maintaining a soft core, it exhibits good toughness and strength, providing excellent resistance to impact loads.

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