SKFDouble-Row Spherical Roller Bearing 120x215x58 mm, Straight Bore, C3 Clearance, W33 Lubrication Groove and Three Holes

Product Description

What this part is

SKF 22224-CY-C3W33 double-row spherical roller bearing. Bore: 120 mm, straight cylindrical. Outside Diameter: 215 mm. Width: 58 mm. Series: 222, ISO base number 22224. Internal Clearance: C3. Relubrication: W33. Number of Rows: 2. Rolling Elements: barrel rollers. Closure: open. Bearing Material: through-hardened bearing steel. Two rows of barrel rollers run on one spherical outer raceway, so the inner ring and roller assembly swivel bodily within the outer ring. That is why this family suits positions where shafts flex and housings are not perfectly co-linear: it self-aligns under both static and running misalignment.

Decoding the designation

22224 is the ISO base number: 222 series double-row spherical roller, 120 mm bore.

CY is an SKF cage and design execution, distinct from CC. The carton also carries MB, a machined-cage execution marking, and both designations are held here as cross-references.

C3 is greater-than-normal radial internal clearance. W33 is an annular lubrication groove with three radial holes in the outer ring. The absence of a K means a straight cylindrical bore, so the bearing mounts directly on the shaft seat.

What these specs mean in practice

Dynamic Load Rating: 652.0 kN. Static Load Rating: 780.0 kN. Limiting Speed: 600 rpm. Ring chamfer r (min): 2.1 mm. Load-calculation factors: e 0.28, Y1 2.4, Y2 3.6, Y0 2.4. Item weight: 16.30 lb (approximately 9.1 kg). Operating temperature range: −30 °C to 200 °C. Lubricant: oil or grease.

Radial internal clearance is the free play between rollers and raceways before mounting, and fitting consumes it: an interference fit expands the inner ring, and in service a hot inner ring grows more than the cooler, housing-conducted outer ring. C3 starts with extra clearance so residual clearance remains after both effects. It is matched to a specific fit and temperature case. In a hot, tightly fitted, heavily loaded position C3 keeps the rollers out of preload; in a cool, lightly loaded, loosely fitted position a normal CN clearance keeps the load spread across more rollers.

The 222 series carries heavy radial load with a modest thrust component in either direction, and tolerates the misalignment that a cylindrical roller bearing in the same position cannot.

Quantity and configuration

Unit Quantity: 1 bearing, a complete non-separable assembly — outer ring, both roller rows, cage, inner ring. Straight bore, mounted directly on the shaft seat.

Fitting notes

Heat mounting or proper pressing tooling applies the fitting force to the ring being seated. Shaft and housing tolerances are specified against the C3 class. The three outer-ring lubrication holes line up with the housing feed port, and W33 leaves a relubrication route where a housing is drilled for one. Grease packs the free space around the rollers rather than the whole housing cavity.

Interchange guidance

Closest alternates, all C3: SKF 22224 CC/W33 C3, FAG 22224-E1-C3, NTN 22224 C3, NSK 22224 C3, Timken 22224 and Rollway / Regal Rexnord 22224 MB C3 W33. Clearance class and cage execution are matched along with the envelope, particularly in hot or shock-loaded positions.

Related sizes: SKF 22224 CCK/W33 is the same envelope with a tapered bore, which mounts on an adapter sleeve. The 232 series 23224 shares the 120 mm bore but is wider and higher capacity, so it needs a housing bored for a 232. Also written 22224-CY-C3W33, 22224 CY C3 W33, 22224CYC3W33, 22224-CY-MB-C3-W33, 22224CY and 22224. Harmonization Code: 8482.30.00.