Crankshaft Induction Hardening
Maximize engine performance with precision-controlled journal and fillet hardening. We deliver high-cycle fatigue resistance and extreme hardness for automotive and industrial crankshafts.
Crankshafts are the most critical rotating components in any engine. At Thakur Industries, we specialize in high-accuracy induction heat treatment that targets bearing journals and pin areas. Our process ensures a hard martensitic surface for wear resistance while maintaining the fillet toughness required to prevent engine-destroying fatigue cracks.
Journals & Fillets
Effective crankshaft hardening requires more than just high HRC levels. We focus on the Transition Zone.
- Journal Hardening: HRC 52–60 for superior bearing life.
- Fillet Hardening: Precision heating to enhance fatigue resistance.
- Oil Hole Protection: Preventing cracks at lubrication points.
- Core Integrity: Preserving ductility for high-RPM stability.
Our Workflow
Stress Relieving
Thermal stabilization before the main hardening cycle to ensure zero micro-cracks.
Induction Cycle
Programmable digital heating of main and big-end journals using module-specific coils.
Quench Control
Advanced polymer quenching to achieve uniform hardness without quenching cracks.
Precision Tempering
Relieving residual stresses to enhance toughness and prevent service failure.
Straightening
Post-heat correction to within ±0.05mm runout using specialized hydraulic jigs.
Final Balancing
Verification of dynamic balance and journal concentricity for high-performance use.
Technical Specs
We deliver OEM-grade standards for automotive, agricultural, and power generation engines:
- Hardness: 52-62 HRC (Material dependent)
- Case Depth: 1.5mm to 4.0mm deep penetration
- Runout: Within 0.05mm after straightening
- Surface Finish: Compatible with final micro-grinding
- Materials: EN19, EN24, 4340, Forged Carbon Steels
Industry Focus
Automotive Engines
Passenger and commercial vehicle crankshafts.
Diesel Gensets
Heavy-duty power generation components.
Industrial Pumps
High-pressure pump shafts and crankshafts.
Other Services
Hardening FAQs
Ready to Harden Your Quality?
Contact us for a free consultation. Send your component details or drawings and get a quick quotation within 24 hours.