SNRSpherical Roller Bearing – Straight Bore, 40 mm ID, 90 mm OD, 23 mm Width, Open, C3 Internal Clearance.

Product Description

What this part is

SNR 21308VJ30 double-row spherical roller bearing, ISO 213 series, 40 x 90 x 23 mm. Bore: 40 mm. Outside Diameter: 90 mm. Overall Width: 23 mm. Rolling Elements: Spherical Roller. Number Of Rows: 2. Bore Type: Straight. Closure Type: Open. Series: 213. Part Number: 21308VJ30. Base Number: 21308. Design Units: Metric.

Decoding the designation

Internal Clearance: C3. In the SNR scheme the J30 suffix is the C3 radial internal clearance group, one step greater than normal. Greater clearance absorbs the loss of running clearance that comes from an interference fit on the shaft and from a temperature gradient across the bearing, so C3 suits a heavier press fit and a hotter inner ring.

Ratings and running limits

Dynamic Load Rating: 97.7 kN. Static Load Rating: 86.7 kN. Fatigue Load Limit: 10.6 kN. Reference Speed: 6400 rpm. Limiting Speed: 9300 rpm. Precision Class: P0, ABEC 1. Running Accuracy: Normal. Operating Temperature Range: –40 °C to +200 °C. Item Weight: 0.715 kg (1.58 lb).

Cage and internal design

Cage Material: Steel. Cage Type: Pressed. Both roller rows run on a single sphered outer raceway, so the inner ring, roller and cage assembly swivels inside the outer ring. Permissible Misalignment: 0.5° at normal load. Bearing Material: Chrome steel.

What these specs mean in practice

Two rows of spherical rollers carry high radial load and take thrust in both directions. Maximum Operating Temperature: 200 °C. The self-aligning geometry absorbs shaft deflection and housing misalignment without concentrating load at the roller ends.

Mounting dimensions

Inner Ring Outside Diameter (d2): 53.5 mm. Outer Ring Inside Diameter (D1): 75.4 mm. Minimum Bearing Fillet Radius (rs min): 1.5 mm. Maximum Abutment Fillet Radius (ra max): 1.5 mm. Minimum Shaft Shoulder Diameter (da min): 49 mm. Maximum Housing Shoulder Diameter (Da max): 81 mm. Calculation Factors: e 0.26, Y0 2.5, Y1 2.55, Y2 3.8.

Quantity and configuration

Unit Quantity: 1 Pc. Single bearing with a straight bore, mounted directly on the shaft seat.

Cross-reference guidance

GTIN: 3413520079161. Manufacturer Part Number: 21308VJ30. Also written 21308.VC3, 21308-V-C3, 21308 V C3 and 21308VC3, and marked on cartons as 21308-CJ C3. Cross-references in the ISO 213 series: NTN 21308VC3, SKF 21308 E/C3, FAG 21308-E1-C3.