SKF22213CCKW33Spherical Roller Bearing 65x120x31 mm 1:12 Taper Bore W33 Lubrication Groove Open

Product Description

What this part is

An SKF 22213CCKW33 double-row spherical roller bearing, 65 mm tapered bore, 120 mm outside diameter, 31 mm width, open on both faces. Two rows of asymmetric barrel rollers run on a common spherical outer raceway, so the inner ring and roller assembly swivels within the outer ring and absorbs shaft misalignment and housing misalignment without edge-loading the raceways. The bore is a 1:12 taper for adapter-sleeve mounting.

Decoding the designation

The leading 222 is the ISO dimension series and the trailing 13 is the bore code, giving 65 mm. CC is the pressed-steel window-type cage with an inner-ring guide ring. K is the 1:12 tapered bore. W33 is an annular lubrication groove machined in the outer ring together with three radial feed holes through it. The same bearing appears in SKF literature and on cartons as 22213 CCK/W33 and in unspaced form as 22213CCKW33.

What these specs mean in practice

The 222 series is the medium-width spherical roller family and carries substantially more radial load than a 213-series bearing of the same bore, in a taller cross-section. A double-row spherical roller bearing takes radial load together with thrust in both axial directions. The W33 groove and holes let grease or oil be fed directly into the space between the two roller rows from the housing, which is how the bearing is relubricated in service without dismounting; a plain outer ring has no such path. The pressed-steel window cage is the general-purpose execution for normal speeds and temperatures.

Adapter sleeve requirement

The 1:12 tapered bore mounts on an SKF H2313 adapter sleeve, which is a separate item and is not included. The sleeve carries a straight cylindrical shaft seat of 60 mm, one bore-code step below the 65 mm bearing bore, and is drawn up by a KM13 locknut with an MB13 lockwasher, neither of which is included. Drawing the bearing up the taper reduces its radial internal clearance, and the amount of drive-up sets the mounted clearance.

Quantity and configuration

1 Pc. Bearing only. Supplied without the H2313 adapter sleeve, without the KM13 locknut and MB13 lockwasher, and without housing, seals or covers.

Fitting notes

The sleeve is positioned on the shaft, the bearing is driven up the taper, and reduction of radial internal clearance is measured with a feeler gauge between the unloaded top roller and the outer raceway before and after drive-up. Mounted clearance rather than shaft interference is the controlling figure on a taper-bore spherical roller bearing. The outer ring locates in the housing bore, and the W33 groove is aligned with the housing lubrication port.

Interchange guidance

22213 CCK/W33, 22213CCKW33 and 22213-CC-K-W33 are the same bearing written three ways. The straight-bore 22213 CC/W33 is a different part — it mounts directly on the shaft with no sleeve — and so is 22213 CCKJ/W33C3, which carries C3 clearance. Same-envelope equivalents in other schemes are FAG 22213-E1-K, NSK 22213EAKE4, Timken 22213KEJW33 and Koyo 22213RHKW33, all 65 x 120 x 31 mm with a 1:12 bore; cage execution and clearance are set independently by each maker.