RHP21312JSpherical Roller Bearing – Straight Bore, 60 mm ID, 130 mm OD, 31 mm Width, Open, Pressed Steel Cage, CN Clearance, Low Cross-Section 213 Series

Product Description

What this part is

RHP 21312 J double-row spherical roller bearing, 60 x 130 x 31 mm. Manufacturer: RHP, now part of NSK. Manufacturer Part Number: 21312J. Base Number: 21312. Series: 21300. Bearing Type: Spherical Roller Bearing. Number of Rows: 2. Rolling Elements: Spherical Rollers. Design Units: Metric. Bore: 60 mm. Outside Diameter: 130 mm. Overall Width: 31 mm. Bore Type: Straight. Closure Type: Open. Cage Type: Pressed steel. Cage Material: Steel. Bearing Material: Bearing Steel. Internal Clearance: CN. Precision Rating: ABEC 1 / P0. Maximum Permissible Misalignment: 2°. Unit Quantity: 1 Pc.

Decoding the designation

213 is the dimension series: a double-row spherical roller bearing on a low cross-section, so the outer ring is thinner and the width narrower than a 222 or 223 bearing of the same bore. In the RHP scheme J is the cage code for a pressed cage. The bore is cylindrical. Searchable forms of the number are 21312J, 21312 J, 21312-J, 21312 CJ, 21312 CC and 21312 CCJ.

What these specs mean in practice

Dynamic Load Rating: 211 kN / 47,400 lbf. Static Load Rating: 226 kN / 50,800 lbf. Limiting Speed: 6,700 rpm. Item Weight: 4.50 lb (2.04 kg). Maximum Temperature: 200°C. Minimum Temperature: −30°C. Two rows of spherical rollers running in a common concave outer raceway carry high radial load and take thrust in both directions, and the roller set swivels within the outer ring, giving 2° of permissible shaft-to-housing misalignment without edge loading. On a double-row spherical roller bearing the static rating sits above the dynamic rating, which is the normal relationship for this type. The 213 low cross-section puts a 130 mm outside diameter on a 60 mm shaft, which suits a housing bore that cannot shrink to a 222 series envelope. CN is the standard radial internal clearance group. Harmonization Code: 8482.30.00.

Bore form and mounting

Bore Type: Straight. The 60 mm cylindrical bore mounts directly on the shaft journal, and the mounted clearance follows from the shaft and housing fits.

Quantity and configuration

Unit Quantity: 1 Pc. One complete bearing: inner ring, two rows of rollers in pressed steel cages, and the outer ring.

Interchange guidance

Cross-Reference 1: SKF 21312 E. Cross-Reference 2: FAG 21312-E1. Cross-Reference 3: Timken 21312CJ. All three sit on the same 60 x 130 x 31 mm envelope with a cylindrical bore. The SKF and FAG entries are reinforced E executions carrying higher load ratings than the figures published above, so take the rating from the designation actually fitted. A 22312 on the same 60 mm bore is a wider, heavier-section bearing and a related size rather than an interchange.