FITRUN is a professional manufacturer of miniature ball bearing in China. Our factory was built in 2003 with a total area of 2,880 square meters (31,000 square feet). The factory production capacity now is up to 20 million sets of ball bearings each year. FITRUN mainly specializes in manufacturing miniature ball bearings of BD (Bore Diameter) from 1mm to 12mm and OD (Outer Diameter) from 3mm to 40mm. The top precision level of our ball bearings is up to ABEC-9. The types of our ball bearings are mainly deep groove ball bearing, flanged ball bearing and thrust ball bearing. We have ball bearings made of stainless steel, chrome steel, bearing steel and ceramic. Our ball bearings have been applied in various products in many industries. FITRUN sticks to offering customers high quality products with competitive prices, short lead time and excellent services. We make stock for most of the models to ensure the prompt delivery to customers for small quantity orders.