Service Center

Customer service policy

Online 7*24 service, reply every inquiry in 5 minutes

Free samples,Global delivery in 2 days

Free solutions for your application field

1-month free replacement, 12-month free maintenance

Our Promises To Each Customer

1.If our product have quality problem. According to standard, when defective quantity is within 10%, compromise settlement is applied(exchange goods or replenishment in time); When defective quantity higher than 10%, they will be recalled and new qualified goods will be replenished within 7 days,

2.If our product cannot be delivered in required date. According to contract, overdue 3 to 5 days, 1000 RMB per day; more than six days overdue, charged 5,000 RMB a day.

3.We provide different benefits to customer. When annual purchase amount reaches to 1 million RMB, you can enjoy a refreshing 3-Day Tour of Hainan. In the amount of 2 million purchase, you can enjoy 3 days Hong Kong trip. In the amount of five million purchase, you can enjoy 5 days Taiwan trip. In the amount of 8 million purchase, 2 people can enjoy French romantic 5-Day trip.

4.Technical engineer one to one service support. Technology, research and development director stand here at any time, please contact your sales to ask for contact information.

5.General manager’s support. Sunkey general manager can deal with complaints and suggestions. When the first order placed, our sales will take the initiative to give you general manager, assistant business contacts.

6.Recommend other quality suppliers related with packaging for our customers.

7.Credit accumulation, you will receive the opportunity for our due net.

Bearing failure analysis

SH BEARING presents a wide range of bearings, suitable for different applications, and trying to fulfill the costumers’ needs. However, we always try to improve the bearing catalogue, and keep on working in developing and adding new references, and specially investing in research and investigation.

That is why, because of that continuous research, when standard bearings are not the optimum to fulfil the requirements of the customer application, we are capable of offering optimized designs for their needs.

Our engineers offer qualified support developing tailor made bearing solutions with our customers. We work hardly along with our costumers selecting the right bearings, the special seal design, the specific coating, the suitable lubricants, etc.

We has a well-equipped mechanical engineering laboratory that is available to our customers for precise measurements of mechanical characteristics of bearings, other components and assemblies. Much of the equipment used has been developed in-house to meet demanding measurement requirements.


★ Starting, average, peak-to-peak torque values
★ Bearing brinelling
★ Contamination
★ Raceway misalignment
★ Retainer drag
★ Lubricant fill and quality
★ Bi-directional torque and Kt analysis
★ Axial, radial (2-mode) measurement of resonance profile over 100Hz to 20KHz


Miniature and instrument bearings are normally made of either stainless steel or chrome alloy steel. National Precision Bearing offers stainless steel for applications that require corrosion resistance, and 52100 chrome steel for maximum fatigue life. These materials are heat-treated to achieve optimum hardness and dimensional stability, and are suitable for most applications.Engineers have infinite® engineering experience and expertise—on average, each has 20 years experience in bearing engineering. It’s no wonder Kaydon engineers have a proven track record of solving the world’s most demanding bearing challenges.Typical bearing suppliers provide standard solutions and average performance while requiring a high minimum order quantity. The Kaydon process is different. Our engineers are accessible and flexible, applying their infinite® expertise whether it’s a catalog bearing or custom, and whether the order is for one or thousands.Kaydon engineers specialize in a given industry (e.g., aerospace, medical, heavy machinery) and, unlike at other suppliers, follow a project through product design, manufacturing, and testing. This provides an in-depth understanding of product and material performance and selection. When customers require stronger, lighter, smaller, faster, and/or quieter bearings and assemblies, they know they can count on Kaydon engineers for the ideal application-specific solution.

The focus of our Application Engineering Department is to provide a full technical service to our customers. This includes recommendations for bearing selection and dimensions.We can offer you a wide range of detailed information about our products in our extensive library but if you require a special bearing design or if you need to solve some assembly problems, you can fill the inquiry and send it to our Application Engineering Department. Our engineers will offer you qualified support and answer your technical questions.Inquiry for data bearing calculation.