SKF23126-CCK/W33Spherical Roller Bearing – Double Row, 130 mm Bore, 210 mm OD, 64 mm Width, 1:12 Tapered Bore, W33 Lubrication Groove, Pressed Steel Cages, CN Clearance

Product Description

What this part is

SKF 23126 CCK/W33 double-row spherical roller bearing. Bore Diameter: 130 mm. Outside Diameter: 210 mm. Overall Width: 64 mm. Series: 231. Base Number: 23126. Number Of Rows: 2. Rolling Elements: Spherical Roller. Bore Type: Tapered 1:12. Closure Type: Open. Bearing Material: Chrome steel. Item Weight: 8.80 kg (19.40 lb). GTIN: 7316576603662.

Decoding the designation

231 — spherical roller bearing dimension series 231, two rows of barrel rollers on one sphered outer raceway.

26 — bore code, 130 mm bore.

CC — two window-type pressed sheet steel cages with a loose guide ring on a flangeless inner ring.

K — tapered bore, 1:12 taper.

W33 — annular groove in the outer ring outside diameter with three radial lubrication holes.

What these specs mean in practice

Dynamic Load Rating: 586,000 N. Static Load Rating: 780,000 N. Limiting Speed: 3,200 rpm. Internal Clearance: CN. Cage Material: Pressed steel. Cage Type: Window, guide-ring centred. Rolling Elements: Spherical Roller. Precision Class: RBEC 1 / P0. Lubricant: grease or oil.

The sphered outer raceway lets both roller rows swivel as a unit, so the bearing carries heavy radial load and thrust in both directions while absorbing static misalignment and running shaft deflection. On this bearing class the static rating sits above the dynamic rating, which is normal for a double-row spherical roller: the long line contact under a stationary load raises the permissible static figure.

The W33 groove and its three radial holes take lubricant from the housing lubrication port and distribute it circumferentially around the outer ring, then feed it inward to both roller rows. Grease and oil both feed through the same passages, so the feature suits a grease gun, an automatic single-point lubricator, a centralised grease system, or circulating oil and oil mist.

Quantity and configuration

Unit Quantity: 1 Pc. Single bearing, open on both faces, 1:12 tapered bore, W33 lubrication feature in the outer ring.

Mounting data

Bore Type: Tapered 1:12. The 130 mm tapered bore seats on a matching tapered shaft journal, or on an H3126 adapter sleeve when the shaft is plain. The H3126 takes a 115 mm shaft seat and its tapered outside diameter is 130 mm, matching this bore. It locks with a KM26 nut and an MB26 lockwasher. Driving the bearing further up the taper reduces the radial internal clearance, which is how the CN starting clearance is consumed to set the running fit. The W33 groove aligns with the housing lubrication port.

Interchange guidance

130 x 210 x 64 mm on a 1:12 tapered bore is the ISO boundary size for a 23126 K. The cross-references below hold that envelope and the same double-row spherical roller construction with the W33 lubrication feature. Cage execution varies between makers and changes the load ratings, so match the cage code where the ratings matter.