NSKHR30215JTapered Roller Bearing Cone and Cup – 75 mm ID, 130 mm OD, 27.25 mm Width, Pressed Steel Cage, Open

Product Description

What this part is: NSK HR30215J single-row metric tapered roller bearing, cone and cup, 302 series, 75 x 130 x 27.25 mm. Bore: 75 mm. Outside Diameter: 130 mm. Overall Width: 27.25 mm. Cone Width B: 25 mm. Cup Width C: 22 mm. Precision Class: ISO Normal. Cage Material: Pressed Steel. Cage Type: Pressed Steel. Rolling Elements: Tapered Roller. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Material: High Carbon Chrome Steel. Design Units: Metric. Item weight: 1.43 kg. Decoding the designation: HR — NSK’s high-capacity tapered roller uprate, which raises the load rating within the standard envelope. 30215 — the ISO 30215 metric taper size, 75 x 130 x 27.25 mm. J — pressed steel cage. What these specs mean in practice: Dynamic Load Rating: 176 kN. Static Load Rating: 182 kN. Limiting Speed: 2,800 rpm grease / 3,800 rpm oil bath, and 5,000 rpm on mechanical or jet oil. Axial load factor e: 0.44. Y1: 1.4. Y0: 0.76. Effective load centre a: 27 mm. An e value of 0.44 with a Y1 of 1.4 describes a shallow-angle taper weighted toward radial capacity, carrying an axial component in one direction while a second bearing takes the opposing thrust. The HR uprate delivers 176 kN of dynamic capacity in a 27.25 mm section, which suits gearboxes, axles, rolling mills and heavy shaft supports. Lubricant: Grease or oil. Mounting data: Cup chamfer r min: 1.5 mm. Cone chamfer r min: 2 mm. Shaft abutment diameter da min: 87 mm. Cone back-face abutment db max: 85 mm. Housing abutment diameter Da min: 115 mm, Da max: 121 mm. Housing abutment Db min: 124 mm. Abutment clearance Sa: 4 mm. Abutment clearance Sb: 5 mm. Shaft fillet radius ra max: 2 mm on the inner ring and 1.5 mm on the outer ring. Quantity and configuration: Unit Quantity: 1 Pc, comprising one cone and its matching cup. Interchange guidance: Cross-references: HR30215J, HR 30215 J, HR-30215-J, HR30215, 30215. A plain 30215 shares the 75 x 130 x 27.25 mm envelope without the HR capacity uprate, so it is a related size rather than a direct substitution.