was established in 2005, which was a professional and non-stop manufacturer for mechanical parts. Changzhou Suma Precision Machinery Co., ltd integrates into R&D, Design, Manufacturing and Sales, the main products areone way clutch bearing, backstop clutch, overrunning clutch, needle roller bearings and spherical plain bearings . It has 6 major categories, over 100 different patterns and more than thousands sizes available. With a wide range of variety , products are widely used in printing machine, packaging machine ,conveyor system, bucket elevator, gearbox , reducer and any power transmission industrial field. 

With over 20 years experience, well equipped testing facilities and strict quality control, Changzhou Suma Precision Machinery Co., Ltd products sell well all over the world, the main markets are European, America, Canada, Brazil, India, Asia, etc . It was a certified enterprise with Quality Management System ISO9001:2015, SGS , Safety Certificate of Approval for Mining Products . In the meantime, with accurate control of key process and technical support from engineer team, customized products are also available. Stable product performance and reliable after sales service always are our only way to win customer. 

The business principle of Changzhou Suma Precision Machinery Co., Ltd is human- oriented , customer first, excellent quality, prestige guarantee and perfect service . We anticipate for the cooperation with you and create a better future.  

As a certified China bearings supplier, we combine competitive pricing with unwavering reliability. We offer free sample quality test service（specially for small standard item). Our strengths lie in： Reliable Quality: Rigorous testing facilities and strict quality control ensure compliance with global standards, from material selection to finished products. We supply best quality clutch & bearings to customer, all production process will be under strictly inspection. Customization Expertise: Tailored solutions for unique specifications, including dimensions, coatings, and lubrication, backed by OEM/ODM capabilities. Trusted Services: Experienced team ensure goods function well before delivery and give guidance for the installation and daily maintenance. Rapid technical support, warranty services, and seamless global logistics to safeguard your operations. 12 Months warranty from the day goods leave out our factory. It is our obligatory duty to support you during the warranty period.