FAG22220ESK.TVPB.C3Double Row Spherical Roller Bearing 100 x 180 x 46 mm, 1:12 Tapered Bore, W33 Lube Groove, Polyamide Cage, C3

Product Description

What this part is:

A double-row spherical roller bearing with a tapered bore, 100 mm bore × 180 mm outside diameter × 46 mm width. Two rows of barrel-profile rollers run on a common spherical outer raceway, so the inner ring and roller set swivel within the outer ring. The bearing carries heavy radial load, takes thrust in both axial directions, and accommodates static misalignment and running shaft deflection.

Decoding the designation:

• 222 — double-row spherical roller dimension series.
• 20 — bore code, 100 mm.
• E — reinforced design, increased load capacity.
• S — lubrication groove around the outer ring with three radial lubrication holes. This is the FAG code for the feature SKF designates W33, which is why both appear on this listing.
• K — 1:12 tapered bore.
• TVPB — glass-fibre reinforced polyamide window cage, roller guided.
• C3 — radial internal clearance greater than normal.

What these specs mean in practice:

The spherical outer raceway is what makes the bearing self-aligning, and the double row is what gives it thrust capacity in both directions rather than one. The reinforced E design uses longer rollers and thinner rings to lift the dynamic rating within the same envelope. The outer-ring groove and three holes let grease or oil enter at the centre of the two roller rows, feeding both rows evenly from a housing port, which is the arrangement used where the bearing is relubricated on a schedule rather than sealed for life. A polyamide cage is lighter and quieter than brass and tolerates momentary shock well; its continuous service ceiling is roughly 120 °C, below what a machined brass cage will take. C3 clearance leaves running room for the interference fit that a tapered bore creates and for a shaft running hotter than its housing.

Published specifications:

• Bore: 100 mm (3.937 in), tapered 1:12
• Outside diameter: 180 mm (7.087 in)
• Width: 46 mm (1.811 in)
• Rows: 2
• Rolling element: spherical (barrel profile) rollers
• Cage: glass-fibre reinforced polyamide, window type, roller guided
• Cage temperature ceiling: approximately 120 °C continuous
• Lubrication feature: outer-ring groove and three radial holes
• Radial internal clearance: C3, greater than normal
• Closure: open, both faces
• Axial load capacity: both directions

Quantity and configuration:

Sale unit 1 Pc. Bearing only. Supplied without adapter sleeve H320, locknut or lock washer.

Fitting notes:

The 1:12 tapered bore seats either on a matching tapered shaft journal or on an adapter sleeve fitted to a plain cylindrical shaft. The matching sleeve for this size is an H320, which takes a 90 mm shaft and is supplied by its maker complete with a KM 20 locknut and MB 20 lock washer. Drive-up distance along the taper sets the mounted radial clearance, so the C3 value above is the free clearance measured before mounting. Where the outer-ring lubrication holes are used, the housing lube port aligns with the groove, which is continuous around the ring and so requires no rotational indexing.

Interchange guidance:

The ISO base number is 22220, and the equivalent SKF designation for a tapered-bore, W33, C3 execution is 22220 EK/C3W33. A 22220 with a cylindrical bore, a different cage code such as the machined brass M or the pressed steel CC, or a different clearance class occupies the same envelope and is a related size: cage material sets the temperature and speed rating, clearance class sets the mounted preload, and bore form sets the mounting method. Each of those changes the published ratings, so they are not substitutions.