KoyoDouble Row Spherical Roller Bearing, 1:12 Tapered Bore, 70 x 150 x 35 mm, Open, Brass Cage, CN Clearance

Product Description

What this part is

A Koyo 21314RKFY double-row spherical roller bearing, 70 mm bore, 150 mm outside diameter, 35 mm width. Tapered 1:12 bore, open, machined brass cage, asymmetric rollers, normal precision class, CN internal clearance.

Decoding the designation

213 is the double-row spherical roller bearing in the 13 dimension series, the narrower and higher-speed of the common spherical roller series. The bore code 14 gives 70 mm. R marks the Koyo design with asymmetric rollers and a machined brass cage. K is the 1:12 tapered bore.

What these specs mean in practice

Two roller rows share a spherical outer raceway, so the bearing self-aligns and tolerates shaft deflection and housing misalignment while carrying heavy radial load and thrust in both directions. The 13 series is narrower and lighter than the 22 or 23 series at the same bore, which raises the speed limit and lowers the load rating. A machined brass cage handles higher temperature and heavier shock than pressed steel.

Bore form

The 1:12 tapered bore on a spherical roller bearing mounts on an adapter sleeve. The matching sleeve is an H2314, which fits a 65 mm plain shaft and is locked by a KM14 nut and MB14 washer. Driving the bearing further up the sleeve taper reduces radial internal clearance, so clearance is set at assembly by axial drive-up.

Quantity and configuration

1 Pc. Complete bearing: outer ring, two roller rows, cage and tapered-bore inner ring. Open both faces.

Interchange guidance

SKF 21314 EK, FAG 21314-E1-K and NSK 21314EAKE4 are tapered-bore 21314 crosses. Koyo 21314R has a straight bore and mounts directly on the shaft with no adapter sleeve.