RHP22218KW33C3Spherical Roller Bearing – Tapered 1:12 Bore, 90 mm ID, 160 mm OD, 40 mm Width, Open, W33 Lubrication Groove, C3 Internal Clearance.

Product Description

What this part is

RHP 22218KW33C3 double-row spherical roller bearing. Series: 22200. Bore: 90 mm. Outside Diameter: 160 mm. Overall Width: 40 mm. Bore Type: Tapered, 1:12. Number Of Rows: 2. Rolling Elements: Spherical rollers. Bearing Material: Chrome steel. Closure Type: Open. Internal Clearance: C3. Precision Class: P0. Precision Rating: ABEC 1, ISO normal class. Cage Type: Pressed, window type. Cage Material: Pressed steel. Unit Quantity: 1 Pc.

Decoding the designation

K — a 1:12 tapered bore.

W33 — an annular lubrication groove machined into the outer ring outside diameter with three radial feed holes running inward to the rolling elements.

C3 — internal radial clearance greater than normal.

Published ratings and speeds

Dynamic Load Rating (Cr): 360 kN (360,000 N / 80,932 lbf). Static Load Rating (C0r): 395 kN (395,000 N / 88,801 lbf). Limiting Speed, oil-bath lubrication: 4,000 rpm. Limiting Speed, grease lubrication: 3,200 rpm. Thermal speed rating on oil bath to ISO 15312: 3,800 rpm. Mechanical limit on forced-circulation oil: 5,000 rpm. Calculation factors: e 0.24, Y2 4.3, Y3 2.9, Y0 2.8. Mass: 3.3 kg (7.3 lb). Harmonization Code: 8482.30.00.

What these specs mean in practice

Two rows of barrel rollers run on a common spherical raceway in the outer ring, so the bearing carries very high radial load, takes thrust in both directions, and accommodates shaft misalignment and housing deflection without raising edge stress on the rollers. The C3 clearance leaves room for the interference generated when the inner ring is driven up the sleeve taper, and for thermal growth of the shaft in service.

Lubrication

Lubricant: grease or oil. The W33 groove distributes lubricant circumferentially around the outer ring and its three radial holes carry it inward to both roller rows. The same passages serve a grease gun, an automatic single-point lubricator, a centralised grease system, or circulating-oil and oil-mist feed.

Bore form and mounting

The 1:12 tapered bore mounts on an H318X adapter sleeve, whose tapered outside diameter is 90 mm and whose shaft seat is 80 mm. The sleeve is secured with a KM18 locknut and an MB18 lockwasher, and the matching withdrawal sleeve is an AHX318. Driving the inner ring up the taper sets the operating clearance, which is why the bearing is supplied at C3 rather than normal clearance. Shaft Abutment Diameter (da): 100 mm minimum, 108 mm maximum. Housing Abutment Diameter (Da): 142 mm minimum, 150 mm maximum. Chamfer Dimension (r min): 2 mm. Shaft or Housing Fillet Radius (ra max): 2 mm.

Interchange guidance

Cross-Reference 1: SKF 22218 EK/C3. Cross-Reference 2: Timken 22218KEJW33C3. Cross-Reference 3: FAG 22218-E1-XL-K-C3. Cross-Reference 4: NSK 22218EAKE4C3. Each is a 90 x 160 x 40 mm, 1:12 tapered-bore, W33-grooved double-row spherical roller at C3 clearance. A plain 22218 without the K carries a straight bore, mounts directly on the shaft and is a related size rather than a direct substitution. Searchable variants: 22218KW33C3, 22218-K-W33-C3, 22218 K W33 C3, 22218KHL, 22218HLKW33C3, 22218KW33, 22218EKC3.