Chongqing Yunyang Crankshaft Co., Ltd., with 2000 million RMB assets and over 1000 employees. Occupying 93 thousand m2, the company specializes in manufacturing of combined-type motorcycle crankshaft and integral universal gasoline engine crankshaft with annual production capacity of 4 million. Yunyang is the only one in China that possesses full range of production procedures of crankshaft, connecting rod and crankshaft pin, I. E. Forging, heat treatment and machining. At present, we can offer CG125, CB125T, CM250, ect 108 various motorcycle crankshafts. The materials are bought from certificated plants, and we insist on utilizing 40Cr, ect materials with high mechanical property. Our chemical and physical center is in charge of chemical component analysis and low-power check and acceptance of raw materials as well as control of quality status in heat treatment procedure. Our length measurement center which owns legal qualification to implement maintenance and periodical check to all measuring tool and air gage guarantees length measure always keep in standard precision range, which offer strict guarantee to high-quality products. Yunyang was the member of China Forging Association, and our characteristic iron dross precision forging technique guarantees surface quality and geometric size precision of non-processing parts, which is still in the leading position in counterparts of China and up to Japanese standard. This processing technique build firm foundation for dynamic balance consistency of crankshaft. Crankshaft forging remaining heat quenching technique which has been used for three years can enhance mechanical property, reduce production cost and cycle, which enhance our market competitiveness. Our company possesses tool set up, clamp and die production lines with self-independent production.
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