OEM Forged Motorcycle Engine Crankshaft for High Performance Engines

We primarily use high-quality alloy steels like 42CrMo4 (DIN), SAE 4340 (AISI), and EN19. For specific high-volume or cost-sensitive applications, we also produce high-strength ductile iron (e.g., GGG-70) crankshafts. Material choice depends on the engine's performance requirements, and we provide full material certification.

Forged Crankshafts: Made from solid alloy steel billets under extreme pressure. They have superior grain flow, higher strength, and better fatigue resistance, making them ideal for high-performance, turbocharged, or heavy-duty applications. Cast Crankshafts: Made from melted ductile iron poured into molds. They offer an excellent strength-to-weight ratio and cost-effectiveness for high-volume passenger car engines. Both processes in our factory utilize advanced technology and strict quality cont

Our standard process includes induction hardening on all journal surfaces (main and pin) to achieve a hard, wear-resistant surface (HRC 55-60) with a tough core. This is followed by tempering to relieve stresses. We also offer nitriding and case hardening for special applications requiring extreme wear resistance or fatigue strength.

Our standard balancing grade is G6.3 per ISO 1940-1, which is suitable for most automotive applications. For high-performance and racing engines, we offer G2.5 or better balancing upon request. Each crankshaft is individually balanced on computerized machines, and a balancing report can be provided.

Yes, absolutely. We specialize in OEM manufacturing and reverse engineering. You can send us a sample, OEM part number, or detailed CAD drawings. Our engineering team will analyze it and provide a manufacturing proposal, including material recommendation and process flow.