Koyo24126RW33C3Double Row Spherical Roller Bearing – Straight Bore, 130 mm ID, 210 mm OD, 80 mm Width, Open, W33, C3 Clearance

Product Description

What this part is

Koyo 24126RW33C3, a double-row spherical roller bearing. Bore: 130 mm. Outside diameter: 210 mm. Width: 80 mm. Series: 241, the low-section spherical roller series. Bore form: straight, cylindrical. Closure: open. Manufactured in Japan.

Decoding the designation

24126 is the ISO base number: series 241, bore code 26, giving a 130 mm bore. R is the Koyo execution code for asymmetric rollers with a brass cage. W33 is a lubrication groove in the outer ring with three radial feed holes. C3 is a radial internal clearance greater than normal. There is no K in the designation, so the bore is straight and the bearing mounts directly on the shaft seat.

Load ratings and speed

Dynamic load rating: 610 kN. Static load rating: 830 kN. Limiting speed: 1900 rpm. Maximum permissible misalignment: 1.5°. Operating temperature range: -30 to 200 °C. Precision: P0, normal class, ABEC 1. Material: chrome steel. Weight: 22.0 lb (10.0 kg).

What these specs mean in practice

The two roller rows run on a common spherical outer raceway, so the inner ring and roller set swivel inside the outer ring and absorb 1.5° of shaft-to-housing misalignment without edge loading. That is the reason this type is specified on long shafts, vibrating screens and crusher drives where seating tolerances open up under load. A double-row spherical takes thrust in both directions as well as its radial load. The 241 series is the low-section variant of the 130 mm bore: a shorter outer-ring section than the 231 or 232 series, for a tighter housing bore.

Clearance and lubrication

C3 clearance leaves more room between rollers and raceways than the normal class, which preserves running clearance once the inner ring has grown from a press fit and from operating heat. That suits high-temperature and heavily interference-fitted positions. The W33 feature makes the outer ring relubricatable in service: grease or oil enters the annular groove and reaches both roller rows through the three radial holes, so the housing can carry a lubrication port and the bearing is serviced without dismantling.

Quantity and configuration

One bearing per unit of sale. Open on both faces.

Interchange guidance

Same envelope and same 1:1 straight-bore, W33, C3 specification: SKF 24126 CC/C3W33 and FAG 24126-E1-C3. Those carry each maker’s own cage execution, so cage material differs between them. Related sizes on the same 130 x 210 x 80 envelope: 24126 CCK30/W33 is the 1:30 tapered-bore version, which mounts on an adapter sleeve rather than directly on the shaft, and 24126 CC/C4W33 carries a wider C4 clearance.