SKF21310CCSpherical Roller Bearing – Straight Bore, 50 mm ID, 110 mm OD, 27 mm Width, Open, CN Clearance, Low Cross-Section 213 Series

Product Description

What this part is

SKF 21310 CC double-row spherical roller bearing, 50 x 110 x 27 mm. Manufacturer: SKF. Manufacturer Part Number: 21310CC. Base Number: 21310. Series: 21300. Bearing Type: Spherical Roller Bearing. Number of Rows: 2. Rolling Elements: Spherical Rollers. Design Units: Metric. Bore: 50 mm. Outside Diameter: 110 mm. Overall Width: 27 mm. Bore Type: Straight. Closure Type: Open. Cage Type: Pressed steel, window. 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. CC is the cage and execution code for a pressed steel window cage; CJ is the same pressed-cage execution under an alternative code. The bore is cylindrical. Searchable forms of the number are 21310CC, 21310 CC, 21310-CC, 21310 CCJ and 21310 CJ.

What these specs mean in practice

Dynamic Load Rating: 156 kN / 35,100 lbf. Static Load Rating: 166 kN / 37,300 lbf. Limiting Speed: 6,000 rpm. Item Weight: 2.89 lb. 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 suits a housing bore that cannot grow to take a 222 series bearing on the same shaft. CN is the standard radial internal clearance group.

Bore form and mounting

Bore Type: Straight. The 50 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 with their cages, and the outer ring. Harmonization Code: 8482.30.00.

Interchange guidance

Cross-Reference 1: FAG 21310-E1. Cross-Reference 2: NTN 21310. Cross-Reference 3: Timken 21310CJ. All three are the same 50 x 110 x 27 mm envelope with a cylindrical bore. Cage execution and load ratings differ between makers, so take the rating from the designation actually fitted. A 22310 on the same 50 mm bore is a wider, heavier-section bearing and a related size rather than an interchange.