MAN is a famous company for development and manufacture of marine low-speed diesel engine in the world. Crankshaft is the core component of low-speed diesel engine, and the crankshaft in the low-speed diesel engine designed by MAN is called MAN series crankshaft. DHHI can produce half-built-up crankshafts for MAN series 50~108 marine low-speed diesel engines.

Wartsila is a famous company for development and manufacture of marine low-speed diesel engine in the world. Crankshaft is the core component of low-speed diesel engine, and the crankshaft in the low-speed diesel engine designed by Wartsila is called Wartsila series crankshaft. DHHI can produce half-built-up crankshafts for Wartsila series 52~96 marine low-speed diesel engines.