FAG22224SKMBC3W33Double-Row Spherical Roller Bearing 120 x 215 x 58 mm Tapered 1:12 Bore Machined Brass Cage C3 Clearance W33

Product Description

What this part is

A FAG 22224-S-K-MB-C3-W33 double-row spherical roller bearing, 120 mm tapered bore, 215 mm outside diameter, 58 mm width. Both rows of barrel rollers run on a common spherical outer raceway, so the inner ring and roller set swivel to absorb shaft misalignment and housing deflection.

Decoding the designation

22224 — 222 dimension series, bore code 24 giving a 120 mm bore, 215 x 58 mm envelope.
S — FAG code for the W33 feature: an annular groove in the outer ring with three radial lubrication holes.
K — tapered bore, 1:12 taper.
MB — machined brass window cage, roller guided.
C3 — radial internal clearance greater than normal.

What these specs mean in practice

A machined brass cage carries higher speeds and higher temperatures than a pressed-steel cage and tolerates shock loading and marginal lubrication better. C3 clearance leaves working clearance after the interference fit that a tapered-bore drive-up produces, and after thermal growth of the inner ring in service. The W33 groove feeds grease or oil directly into the roller path from the housing.

Published specifications

Bore 120 mm, tapered 1:12 · OD 215 mm · Width 58 mm
Two rows of symmetrical barrel rollers
Machined brass cage
Radial internal clearance C3
W33 outer-ring lubrication groove and three radial holes
Open on both faces

Quantity and configuration

1 Pc. Bearing only, supplied without adapter sleeve. The matching adapter sleeve is the H3124, whose shaft seat is 110 mm.

Fitting notes

A 1:12 tapered bore sets its own interference fit by drive-up distance on the sleeve taper or the shaft journal, with residual internal clearance measured across the roller rows as the drive-up progresses. Housing seats are line bored and supported across the full outer-ring width so that the self-aligning action handles shaft deflection rather than seat distortion.

Interchange guidance

Same-spec tapered-bore C3 equivalents are the SKF 22224 CCK/W33 C3, Timken 22224KEMW33C3, NSK 22224CAKE4C3 and NTN 22224BKD1C3. The straight-bore 22224 and the CN-clearance forms share the outside envelope but are related sizes, since the mounting method and the fitted clearance differ. The FAG 20224 on a similar envelope is a single-row barrel roller bearing with no axial capacity and is a different bearing type.