SKF22218CCW33W64Double-Row Spherical Roller Bearing, 90 x 160 x 40 mm, Straight Bore, Pressed Steel Cage, W33 Lubrication Groove

Product Description

What this part is

An SKF 22218 CC/W33 double-row spherical roller bearing. Bore 90 mm, outside diameter 160 mm, width 40 mm, straight cylindrical bore, open on both faces. Two rows of barrel-shaped rollers share one spherical raceway in the outer ring, so the inner ring and roller set swivel bodily inside the outer ring and the bearing carries load through shaft deflection and housing misalignment.

Decoding the designation

The 222 dimension series is the wider, higher-capacity spherical roller series, and the bore code 18 gives 90 mm. CC is the pressed steel cage with an inner-ring guide ring. W33 is the lubrication groove machined around the outer ring together with three radial feed holes through it. There is no K, so the bore is straight, and no clearance suffix, so radial internal clearance is normal, CN. The trailing W64 block is not part of the published SKF suffix scheme and is carried here as a searchable reference rather than as a specification.

What these specs mean in practice

A double-row spherical roller bearing carries very heavy radial load and takes thrust in both directions, and it is the type chosen where a shaft flexes under load or a housing bore cannot be held in line. Normal CN clearance is the general-purpose setting: enough running room for an interference fit on the shaft and a moderate temperature difference across the rings, without the extra internal freedom of C3 or C4. The W33 groove and holes let grease be fed through the housing straight into the rolling elements, which is how a bearing this size is relubricated on a schedule without dismantling the assembly.

Quantity and configuration

1 Pc. Straight bore, mounting directly onto a cylindrical shaft seat. Open both faces, with sealing handled by the housing. No adapter sleeve, no locknut, no stabilising ring.

Fitting notes

The inner ring is an interference fit on the shaft and is mounted by even heating rather than by pressing across the rollers. Residual radial internal clearance is measured with a feeler at the unloaded roller row after mounting, since the interference fit consumes part of the original allowance. A housing carrying a W33 bearing is drilled to register with one of the three outer-ring holes, and the bearing is set with the groove clear of the housing split line.

Interchange guidance

Genuine same-spec interchanges on this envelope with a pressed steel cage and the same lubrication provision are FAG 22218-E1-XL-W33, NSK 22218CDE4, NTN 22218BD1 and Koyo 22218RHW33, all 90 x 160 x 40 mm, straight bore, CN. The SKF 22218 CY/W33 is the pressed brass window-cage version of the same size, the 22218 CCK/W33 the 1:12 tapered-bore version, and the 22218 CC/C3 W33 the greater-clearance version — each a related size rather than a substitution.