Variations of structure: A) Machined type needle roller bearing NA49, NA59, NA69, NKI, NKIS, BRI, TAFI, NAO, NA...2RS, etc. B) Machined type needle roller bearing without inner ring RNA49, RNA59, RNA69, NK, NKS, TAF, RNAO, RNA, HJ, BR, NCS, MR, etc. 1) Material: chrome steel (GCR15) 2) Roller: steel 3) Precision: P0 - P6 4) Vibration: Z1 - Z3 5）Clearance: C0 - C5 6）Application: Transmission gearbox, engine, valve parts, steering and brake system, axle bearing, outboard engines, electric power tools, copy and fax machine, paper conveying equipment.