NSK22222MKE4C3Double-Row Spherical Roller Bearing – 1:12 Tapered Bore, 110 mm ID, 200 mm OD, 53 mm Width, Open, Machined Brass Cage, C3 Clearance, W33 Lubrication Groove.

Product Description

What this part is

NSK 22222MKE4C3 double-row spherical roller bearing, 110 mm tapered bore, 200 mm outside diameter, 53 mm width. Open, machined brass cage with a guide ring, C3 radial internal clearance, with an annular groove and three lubrication holes in the outer ring. NSK’s full designation for this build is 22222CAMKE4C3.

Decoding the designation

222 marks a double-row spherical roller bearing in the 22 dimension series, and the bore code 22 multiplied by five gives the 110 mm bore. M is the machined brass cage. K is the 1:12 tapered bore. E4 is the lubrication feature: a groove machined around the outer ring with three radial feed holes, designated W33 by other makers. C3 is radial internal clearance greater than normal.

What these specs mean in practice

Two rows of barrel-shaped rollers run on a single sphered outer raceway, so the inner ring and rollers swivel and the bearing absorbs shaft misalignment and housing deflection without edge loading. Double row means thrust in both directions as well as heavy radial load: 605 kN dynamic and 645 kN static. The machined brass cage is stronger than pressed steel under shock and accelerating loads, which is why this build is chosen for crushers, screens and mill applications. C3 clearance leaves more room for thermal growth and for the clearance lost when the tapered bore is driven up the sleeve, which matters on a hot or heavily interference-fitted shaft. The brass cage build carries no high-temperature stabilisation, so 120°C is the ceiling.

Bore form and mounting hardware

The 1:12 tapered bore mounts on an adapter sleeve. For a 22222K that sleeve is an H322, with a 100 mm shaft seat, and it is retained by a KM22 locknut and an MB22 lockwasher. Driving the bearing further up the taper reduces the radial internal clearance, which is how the fit and the final running clearance are set on assembly.

Quantity and configuration

Single bearing. 1 Pc.

Interchange guidance

Same build from another maker: Timken 22222KEMW33C3 – brass cage, 1:12 taper, W33, C3. Near parts with a difference: NSK 22222EAKE4C3 – pressed steel cage, not brass, which changes cage strength and speed rating; 22222MKE4 – CN clearance, not C3, which changes the drive-up distance and running temperature; the straight-bore 22222 – mounts directly on the shaft with no sleeve.