https://www.thb-bearings.com/products/bk-0509-drawn-cup-needle-roller-bearing.html Specifications of BK 0509 Drawn Cup Needle Roller Bearing Designations BK0509 Dimensions(mm) Fw 5 D 9 C 9 r1,2 0.4 Basic load ratings(KN) Basic load ratings (dynamic)(C) 2,261 Basic load ratings (static)(C0) 1,997 Fatigue load limit (Pu) 0,209 Speed ratings(r/min) Speed ratings (Reference speed) 22 000 Speed ratings (Limting speed) 24 000 Mass(kg) 0.0021 A specialized solutions provider of bearing technology, THB Bearings Co.Ltd (Shanghai) is an industrial technical services company that offers customers a simple and convenient source for bearing components, technical services and solutions. With a head office located in China (Shanghai) along with established warehouses and service centers in the Netherlands and Germany, THB China services the global marketplace. To date, as one of the industrial bearing manufacturers, THB has already officially registered the RORKS brand in mainland China.