SNR22211EAKB33J30Spherical Roller Bearing – Double Row, 1:12 Tapered Bore, 55 mm ID, 100 mm OD, 25 mm Width, Open, W33 Lubrication Groove, C3 Internal Clearance

Product Description

What this part is

SNR 22211EAKB33J30 double-row spherical roller bearing. Series: 22200. Base Number: 22211. Bore: 55 mm. Outside Diameter: 100 mm. Overall Width: 25 mm. Number Of Rows: 2. Rolling Elements: Spherical Roller. Bore Type: Tapered 1:12. Closure Type: Open. Cage Material: Pressed Steel. Cage Type: Pressed. Internal Clearance: C3. Precision Class: ABEC 1 / ISO P0. Bearing Material: Bearing steel. Item Weight: 1.83 lb (0.83 kg). Design Units: Metric. Unit Quantity: 1 Pc.

Decoding the designation

222 is the double-row spherical roller medium width series and the bore code 11 gives a 55 mm bore. EA marks the reinforced high-capacity execution with a pressed steel cage. K is the 1:12 tapered bore. B33 is the SNR form of the W33 lubrication feature — an annular groove machined in the outer ring outside diameter with three radial holes through to the rolling elements. J30 is the SNR clearance code for C3, a radial internal clearance wider than normal. The part is also marked 22211 EA K W33 C3, 22211EJW33C3, 22211C and 22211CC.

What these specs mean in practice

Two rows of barrel-profile rollers run on a common sphered outer raceway, so the bearing takes up angular misalignment between two shaft supports while carrying heavy radial load and thrust in either direction. Maximum Operating Temperature: 200°C. C3 clearance suits a tapered-bore mounting drawn up its seat and a shaft running hotter than its housing, both of which consume running clearance.

Lubrication feature

Relubrication: B33 — an outer-ring lubrication groove with three radial holes, the SNR form of W33. Lubricant: grease or oil. The groove distributes lubricant circumferentially around the outer ring and the three radial holes carry it inward to the centre of the roller path.

Bore form and adapter sleeve

The bore is tapered 1:12 with a 55 mm large-end diameter, so it seats on an adapter sleeve whose tapered outside diameter is 55 mm. That sleeve is the H311, which carries a 50 mm cylindrical shaft seat, together with a KM 11 locknut and an MB 11 lock washer. Drawing the bearing up the sleeve taper sets the radial internal clearance by controlled inner-ring expansion, which is what makes a tapered-bore spherical roller mountable on a plain unstepped shaft.

Quantity and configuration

Unit Quantity: 1 Pc. One complete double-row spherical roller bearing, open on both faces.

Cross-references

SKF 22211 EK/C3, FAG 22211-E1-K-C3, NSK 22211EAKE4C3, Timken 22211KEJW33C3. All four are tapered-bore 22211 executions on the 55 x 100 x 25 mm envelope with the W33 lubrication feature and C3 clearance; the same numbers without the C3 suffix carry normal clearance. Harmonization Code: 8482.30.00.40.