TORRINGTON22211KW33BRDouble-Row Spherical Roller Bearing – 1:12 Tapered Bore, 55 mm ID, 100 mm OD, 25 mm Width, Open, W33 Lubrication Groove, CN Clearance, H311 Sleeve Mount

Product Description

What this part is

Torrington 22211KW33BR double-row spherical roller bearing, 222 series, 55 mm bore x 100 mm outside diameter x 25 mm width. Bore: 55 mm. Outside Diameter: 100 mm. Overall Width: 25 mm. Bore Type: Tapered, 1:12 taper. Number Of Rows: 2. Rolling Elements: Spherical rollers. Closure Type: Open. Internal Clearance: CN, Timken class C0, normal. Precision Class: ABEC 1, ISO normal. Permissible Misalignment: 1.5°. Relubrication Feature: W33, an annular groove in the outer ring outside diameter with three radial holes. Design Units: Metric. Material: Chrome steel. Country of Origin: United States.

Decoding the designation

222: the double-row spherical roller series. 11: the bore code, giving 55 mm. K: tapered bore. Timken states that a taper of 1:12 is standard except for the 240, 241 and 242 series, so this bore is 1:12. W33: an annular lubrication groove in the outer ring outside diameter with three radial holes through to the rollers, which Timken describes as three holes and groove in O.D. Searchable variants: 22211-K-W33-BR, 22211 K W33 BR, 22211 K W33 BR F4, 22211KW33, 22211K.

What these specs mean in practice

Two rows of barrel-shaped rollers run in a common spherical outer raceway, so the inner ring, rollers and cage swivel as an assembly relative to the outer ring. That gives 1.5° of permissible misalignment and makes the bearing tolerant of shaft deflection and housing bore misalignment. Because both rows are angled, a double-row spherical roller bearing carries thrust in either direction as well as heavy radial load. The 1:12 tapered bore lets the bearing be driven up a matching taper, so radial internal clearance is set by drive-up distance rather than by shaft interference fit. The W33 groove distributes lubricant circumferentially around the outer ring and its three radial holes carry it inward to the rolling elements; the same passages take grease or oil, so the feature suits a grease gun, a single-point lubricator or a circulating-oil system equally. Internal Clearance: CN, the normal class, which is correct on a clearance-set bearing. Lubricant: grease or oil.

Quantity and configuration

Unit Quantity: 1 Pc. Tapered-bore execution. It mounts on an H311 adapter sleeve, which has a 50 mm cylindrical shaft seat and a 55 mm tapered outside diameter matching this bore, together with a KM11 locknut and an MB11 lockwasher. It also mounts directly on a shaft journal machined to a 1:12 taper.

Interchange guidance

Same-envelope tapered-bore designations: SKF 22211 EK, FAG 22211-E1-XL-K, NSK 22211EAKE4, Timken 22211KEJW33. Related part in the same series: the 22211CJW33, which shares the 55 x 100 x 25 mm envelope with a straight cylindrical bore.