NSKHR30211JTapered Roller Bearing Cone & Cup – 55 mm Bore x 100 mm OD x 22.75 mm Wide, High-Capacity HR Design, Pressed Steel Cage

Product Description

What this part is: NSK HR30211J single-row metric tapered roller bearing, supplied as a matched cone and cup. Bore: 55 mm. Outside Diameter: 100 mm. Total Width (T): 22.75 mm. Cone Width (B): 21 mm. Cup Width (C): 18 mm. Bearing Type: Single-row metric tapered roller bearing. Number of Rows: 1. Rolling Elements: Tapered roller. Cage Material: Pressed steel. Closure Type: Open. Dynamic Load Rating: 116 kN. Static Load Rating: 113 kN. Limiting Speed: 3,600 rpm on grease, 5,000 rpm on oil, 6,700 rpm on oil jet. Item Weight: 0.736 kg. Decoding the designation: HR — NSK’s high-capacity tapered roller execution, with a longer roller complement than the plain 30211 on the same envelope. 302 — ISO dimension series 02 for metric tapered roller bearings. 11 — bore code 11, giving a 55 mm bore. J — pressed steel cage. What these specs mean in practice: Dynamic Load Rating: 116 kN. Static Load Rating: 113 kN. The HR execution is what buys the capacity: NSK lengthens the rollers and reworks the raceway crowning within the same 55 x 100 x 22.75 mm envelope, so the bearing drops into a standard 30211 seat and carries more load in it. Axial Load Factor (e): 0.41. Axial Load Factor (Y0): 0.81. Axial Load Factor (Y1): 1.5. These are the ISO factors used to convert a combined radial and axial load into the equivalent radial load for life calculation. The tapered raceway means the bearing carries radial and axial load together, and takes thrust in one direction only. A tapered roller bearing is normally set against a second one facing the other way, which is where the cone and cup being separable pays off: the two halves are fitted from opposite ends and the set is adjusted to a clearance or a preload during assembly. Limiting Speed: 3,600 rpm on grease, 5,000 rpm on an oil bath and 6,700 rpm on an oil jet. Mounting data: Effective Load Centre (a): 20.9 mm. Shaft Abutment Diameter (da min): 67 mm. Shaft Abutment Diameter (db max): 64 mm. Housing Abutment Diameter (Da): 89 to 91 mm. Housing Abutment Diameter (Db min): 94 mm. Cone Chamfer (r min): 2 mm. Cup Chamfer (r min): 1.5 mm. Maximum Abutment Fillet Radius: 2 mm at the inner ring, 1.5 mm at the outer ring. Clearance Sa: 4 mm. Clearance Sb: 4.5 mm. Quantity and configuration: Unit Quantity: 1 Pc. One complete bearing — the cone with its roller and cage assembly, plus its matching cup. Interchange guidance: The envelope is the ISO 30211 standard 55 x 100 x 22.75 mm, so this bearing occupies the same shaft and housing seats as a plain 30211 from any maker. The HR prefix raises the load ratings without changing a single boundary dimension, so an HR30211J substitutes directly for a 30211 while the reverse swap gives up capacity. Cone and cup halves are matched within the designation and are not interchanged across manufacturers. Searchable variants of the part number: HR30211J, HR-30211-J, HR 30211 J, HR30211, 30211J, 30211.