SKF22210 CCK/W33Double-Row Spherical Roller Bearing, 50 x 90 x 23 mm, 1:12 Tapered Bore, W33 Outer-Ring Lubrication Groove

Product Description

What this part is:

A double-row spherical roller bearing on the 22210 envelope — 50 mm bore, 90 mm outside diameter, 23 mm width, with a 1:12 tapered bore. Both rows of barrel rollers run against one spherical raceway ground into the outer ring, so the inner ring, rollers and cage can swivel bodily inside the outer ring. That combination of very high radial capacity and self-alignment is why this family lives in gearboxes, conveyor pulleys, fans, crushers and screens.

Decoding the designation:

• 222 – ISO dimension series for spherical roller bearings.
• 10 – bore reference number; 10 × 5 = 50 mm bore.
• CC – single-piece steel window cage with an inner-ring centre guide rib.
• K – 1:12 tapered bore.
• W33 – annular lubrication groove around the outer ring with three radial holes into the raceway.

What these specs mean in practice:

The tapered bore is the fit decision and the thing to check before ordering. A K bearing will not press onto a plain cylindrical shaft seat. You either have a shaft machined with a matching 1:12 taper, or you mount the bearing on an adapter sleeve — H 310 for this size, which seats on a plain 45 mm shaft — locked with a nut and lock washer.

On a taper, drive-up distance is how you set the running clearance. The further you push the inner ring up the cone, the more the ring expands and the more internal clearance you consume, so mounting is a measured operation: check the clearance reduction with a feeler gauge or a dial indicator as you tighten, and stop at the figure the machine specification calls for. That controllability is exactly why tapered-bore spherical rollers are preferred on driven pulleys and mill shafts — you can set clearance in the field without regrinding anything.

The W33 groove and its three radial holes feed grease or oil in through the outer ring directly between the two roller rows, which is how you relubricate without stripping the housing. It needs a housing with a lube port aligned to the groove, typically a split plummer block; in a plain housing the groove sits idle and does no harm.

Published ratings and mounting data:

• Bore: 50 mm, 1:12 taper
• Outside diameter: 90 mm
• Width: 23 mm
• Rows: 2, barrel rollers
• Basic dynamic radial load rating C: 107 kN
• Basic static radial load rating C0: 108 kN
• Reference speed: 7 000 rpm — limiting speed 9 500 rpm
• Cage: single-piece steel window cage
• Closure: open
• Matching adapter sleeve: H 310 (seats a 45 mm shaft)
• Mass: approximately 0.62 kg

Quantity and configuration:

Priced and supplied as one bearing. Adapter sleeve, lock nut and lock washer are not included — if you are mounting on a plain 45 mm shaft rather than a machined taper you will need an H 310 sleeve alongside this bearing.

Interchange guidance:

Tapered-bore 22210 K W33 spherical roller bearings from other makers: SKF 22210 EK/W33, FAG 22210-E1-XL-K, NSK 22210EAKE4, NTN 22210BKD1, Koyo 22210RHRKW33, Timken and Torrington 22210KEJW33, Steyr 22210-C-K-MB-W33. The designations 22210 CK, 22210 CJK and 22210 CCKJ describe the same bearing in older and in Torrington lineage nomenclature and are carried here as search terms. Straight-bore 22210 CC/W33 and 22210 E share the same outside diameter, width and load ratings, but the bore is cylindrical — carried as a dimensional cross-reference only, since a straight-bore bearing cannot be mounted on a taper or a sleeve and a K bearing cannot be pressed onto a plain seat.