Ningbo Jiaju machinery manufacturing Co. ,Ltd is a private enterprise which is specialized in the production of machinery parts and casting parts with experience of over 20 years. It is a outstanding manufacturer of machinery parts like shafts, axle sleeves, joints, couplings, bearing turnings, non-standard screws, nuts, bolts and industrial sewing machinery fittings. This enterprise covers over 3,000 square meters, the factory building is 2,000 square meters. Ningbo Xinghe Casting Co., Ltd is the subsidiary plant, which specializes in casting parts, for instance, shop truck relieving , binding castings for ship products, tractor accessories products, valves and so on. The annual output amounts to 4,500 tons. With the second largest port - Ningbo port nearby, the company has developed rapidly in rencent years on export trade.

Ability for the material of this kind of spring:

Ability for the surface finish:

Ability for the tolerance: