SNRSpherical Roller Bearing – Tapered Bore, 100 mm ID, 180 mm OD, 46 mm Width, Open, C3 Internal clearance.

Product Description

What this part is

SNR 22220EAKW33C3 double-row spherical roller bearing, ISO 222 series, 100 x 180 x 46 mm. Bore: 100 mm. Outside Diameter: 180 mm. Overall Width: 46 mm. Rolling Elements: Spherical Roller. Number Of Rows: 2. Bore Type: Tapered 1:12. Closure Type: Open. Series: 222. Part Number: 22220EAKW33C3. Base Number: 22220. Design Units: Metric. Bearing Material: Bearing steel.

Decoding the designation

Base Number: 22220, setting the 100 x 180 x 46 mm envelope. EA is the high-capacity execution with a pressed steel cage. K is the 1:12 tapered bore. W33 is the lubrication feature, written B33 in the alternative SNR suffix form. Internal Clearance: C3, written J40 in the alternative form for C4 and J30 for this C3 grade. Searchable variants of the number: 22220EAKW33C3, 22220.EAKW33C3, 22220-EA-K-W33-C3, 22220 EA K B33 J30, 22220EAKB33J30, 22220CKJ, 22220CCKJ.

Ratings and running limits

Dynamic Load Rating: 472 kN. Static Load Rating: 495 kN. Fatigue Load Limit: 54.3 kN. Reference Speed: 3600 rpm. Limiting Speed: 4600 rpm. Precision Class: P0, ABEC 1. Operating Temperature Range: –40 °C to +200 °C. Item Weight: 4.85 kg (10.70 lb). Harmonization Code: 8482.30.00. 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 100 mm bearing bore. Adapter Sleeve: H320, which carries a 90 mm shaft seat. The sleeve is a related part and is supplied with a KM20 locknut and an MB20 lockwasher. Drawing the inner ring up the taper sets the radial internal clearance directly, so the same bearing serves a range of shaft tolerances.

Cage and internal design

Cage Type: Roller guided. Cage Material: Pressed 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.

What these specs mean in practice

Two rows of spherical rollers carry very high radial load and take thrust in both directions. On a double-row spherical roller bearing of this size the static rating exceeds the dynamic rating, which is normal for the type. C3 clearance is one step greater than normal and suits a heavier press fit and a hotter inner ring. Maximum Operating Temperature: 200 °C.

Mounting dimensions

Minimum Bearing Fillet Radius (rs min): 2.1 mm. Maximum Abutment Fillet Radius (ra max): 2 mm. Minimum Shaft Shoulder Diameter (da min): 112 mm. Maximum Housing Shoulder Diameter (Da max): 168 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.

Interchange guidance

Manufacturer Part Number: 22220EAKW33C3. Closest first, all E-design 22220 bearings with a 1:12 tapered bore and C3 clearance: NTN 22220EAKW33C3 (W33 groove, pressed steel cage), NSK 22220EAKE4C3 (E4 groove), SKF 22220 EK/C3, FAG 22220-E1-K-C3, Timken 22220EJW33KC3 (EJ pressed steel cage, W33 groove).