Crankshaft Grinding

Crankshaft Grinding & Reconditioning

Precision Engineering for the Heart of Your Engine

At Twinco, we understand the crucial role crankshafts play in diesel engine performance. As the core component that converts linear piston motion into rotary power, the crankshaft is truly the heart of every engine—be it in maritime, industrial, or power generation applications.

Expert Grinding for Marine & Industrial Crankshafts

We specialize in the precision grinding and polishing of crankshafts for four-stroke diesel engines with power ratings of 50 kW and above. Our expertise covers a wide range of engine brands, including MAN, Wärtsilä, Sulzer, Himsen, MWM, MaK, SKL, and others, as well as crankshafts for compressors from manufacturers such as Neumann & Esser, GHH, Atlas Copco, and Sabroe.

Whether dealing with steel, cast, or laser-welded build-up crankshafts, our modern grinding lathes and experienced technicians ensure each unit is restored to exact specifications—ensuring reliability and extended service life.

The Twinco Advantage

We treat every crankshaft with the utmost care and professionalism. Improper grinding can result in premature bearing wear or serious engine damage. With decades of hands-on experience and industry-best equipment, we ensure every crankshaft is machined with precision and compliance to OEM tolerances.

Services Include:

  • Journal grinding and polishing to restore surface integrity
  • Re-machining of crankpins and main bearing journals
  • Inspection and crack detection
  • Reconditioning by laser weld build-up and post-machining (with partner facilities)
  • Certified processes under ISO 9001:2008
  • Class-approved heat treatment, straightening, and hardness reduction as required
Crankshaft Grinding Services