NTNW22228BLLKC3W33Spherical Roller Bearing – 1:12 Tapered Bore, 140 mm ID, 250 mm OD, 88 mm Width, Open, C3 Internal Clearance, W33 Lubrication Groove.

Product Description

What this part is:

NTN W22228BLLKC3W33 double-row spherical roller bearing. Bore: 140 mm, 1:12 tapered. Outside diameter: 250 mm. Width: 88 mm. Open on both faces, with a W33 lubrication groove and three feed holes in the outer ring. Internal clearance: C3.

Decoding the designation:

K: 1:12 tapered bore for adapter-sleeve mounting. C3: internal clearance greater than normal. W33: lubrication groove and three radial holes in the outer ring. LL in the carton form W-22228-BLL-K-C3-W33 marks the sealed-execution ring set. Carton also marked MX-W22228EALLK W33 C3.

What these specs mean in practice:

Two roller rows share one sphered outer raceway, so the bearing carries heavy radial load, takes thrust in both directions, and accommodates misalignment between shaft and housing. C3 clearance suits a press-fit inner ring, a warm running housing, or a shaft that grows in service, all of which consume clearance once the machine is at temperature.

Bore form:

The 1:12 taper mounts on an adapter sleeve, and how far the bearing is driven up the taper is what sets the mounted radial clearance. The sleeve, its lock nut and its lock washer are separate parts.

Quantity and configuration:

One bearing per unit.

Interchange guidance:

Punctuation and spacing variants: W22228BLLKC3W33, W-22228-BLL-K-C3-W33, W 22228 BLL K C3 W33, MX-W22228EALLKW33C3. Related same-family executions carrying a straight bore drop the K and mount directly on the shaft.