SNR22212EAKB33J30Spherical Roller Bearing – Tapered 1:12 Bore, 60 mm ID, 110 mm OD, 28 mm Width, Open, W33 Lubrication Groove, C3 Internal Clearance

Product Description

What this part is

SNR 22212EAKB33J30 double-row spherical roller bearing, ISO 222 series, 60 x 110 x 28 mm. Bore: 60 mm. Outside Diameter: 110 mm. Overall Width: 28 mm. Rolling Elements: Spherical Roller. Number Of Rows: 2. Bore Type: Tapered 1:12. Closure Type: Open. Series: 222. Part Number: 22212EAKB33J30. Base Number: 22212. Design Units: Metric. Bearing Material: Bearing steel.

Decoding the designation

Base Number: 22212, setting the 60 x 110 x 28 mm envelope. EA is the high-capacity execution with a pressed steel cage. K is the 1:12 tapered bore. B33 is the lubrication feature, written W33 in the ISO suffix form. J30 is the C3 radial internal clearance group. Searchable variants of the number: 22212EAKB33J30, 22212EAKW33C3, 22212.EAKW33C3, 22212-EA-K-B33-J30, 22212 EA K W33 C3, 22212EKJ W33 C3.

Ratings and running limits

Dynamic Load Rating: 187 kN. Static Load Rating: 181 kN. Fatigue Load Limit: 22.1 kN. Reference Speed: 5600 rpm. Limiting Speed: 7500 rpm. Precision Class: P0, ABEC 1. Internal Clearance: C3. Operating Temperature Range: –40 °C to +200 °C. Item Weight: 1.09 kg (2.40 lb). Country of Origin: Italy.

Lubrication feature

Relubrication Feature: annular groove in the outer ring outside diameter with three radial holes through to the rolling elements. Lubricant: grease or oil. The groove distributes lubricant circumferentially around the outer ring and the three radial holes carry it inward to both roller rows, which suits a grease gun, a single-point lubricator, a centralised grease system, or circulating-oil and oil-mist feed through the same passages.

Tapered bore and adapter sleeve

Bore Type: Tapered 1:12. The tapered bore mounts on an adapter sleeve whose tapered outside diameter matches the 60 mm bearing bore. Adapter Sleeve: H312, which carries a 55 mm shaft seat. The sleeve is a related part and is supplied with a KM12 locknut and an MB12 lockwasher. Drawing the inner ring up the taper sets the radial internal clearance directly, so the same bearing serves a range of shaft tolerances and mounts on a plain unstepped shaft.

Cage and internal design

Cage Type: Pressed, two-window. Cage Material: Steel. Permissible Misalignment: 0.5° at normal load. The two roller rows share one concave outer-ring raceway, so the inner ring and roller set swivel within the outer ring and absorb shaft deflection and housing misalignment.

What these specs mean in practice

Two rows of spherical rollers carry high radial load and take thrust in both directions. C3 clearance is one step greater than normal and absorbs the running clearance lost to the interference fit and to a temperature gradient across the bearing, so it suits a heavier fit and a hotter inner ring. Maximum Operating Temperature: 200 °C.

Mounting dimensions

Minimum Bearing Fillet Radius (rs min): 1.5 mm. Maximum Abutment Fillet Radius (ra max): 1.5 mm. Minimum Shaft Shoulder Diameter (da min): 69 mm. Maximum Housing Shoulder Diameter (Da max): 101 mm. Calculation Factors: e 0.24, Y0 2.78, Y1 2.84, Y2 4.23. Lubrication Holes: 3.

Quantity and configuration

Unit Quantity: 1 Pc. One complete bearing ships as a single assembled unit — outer ring, inner ring, two rows of spherical rollers and the pressed steel cages. New old stock, made in Italy.

Interchange guidance

GTIN: 3663952568188. Manufacturer Part Number: 22212EAKB33J30. On the same 60 x 110 x 28 mm envelope, the same 1:12 tapered bore and the same C3 clearance class: SKF 22212 EK/C3, FAG 22212-E1-K-C3, NTN 22212EAKW33C3, NSK 22212EAKE4C3, Timken 22212EJW33KC3.