Shanghai Nazhen Machine Co. Ltd. Is dedicated to the production of high quality crankshafts used in a variety of applications, including compressors, refrigeration compressors, textile looms, oil pumping units, other industrial compressors and motorcycle, automobile engine crankshaft. Founded in 2004, we now have an annual output of 1 million crankshafts, backed by a professional technical team and chief engineer with more than 20 years of production experience.