Timken EJ and EM Spherical Roller Bearings 222 and 223 Series

Timken EJ and EM spherical roller bearings for heavy radial loads and shaft misalignment

Timken spherical roller bearings carry heavy radial loads, moderate thrust in both directions and a shaft that is not perfectly aligned with its housing. The inner ring with its two rows of barrel-shaped rollers can self-centre in the outer ring, so the load stays on the middle of each roller when the shaft deflects or the housings are slightly out of line. That is why this bearing type is specified for gear drives, fans and blowers, conveyors, jaw crushers, shaker screens, paper mills and continuous casters, the applications Timken lists on its product page.

This page covers the standard radial range in the 222 and 223 series that Timken prints in its Spherical Roller Bearing Catalog, in the steel-cage EJ and brass-cage EM designs. Timken states that the improved internal geometry gives 4% to 8% higher load ratings, or 14% to 29% longer predicted bearing life, and that guiding the rollers in the cage pockets (no centre guide ring) removes a friction point and cuts rotational torque by 4% to 10%. Rollers are guided by the cage pockets and cage face slots help oil flow and purge contaminants.

Technical specifications

Sample catalogue values, steel-cage EJ designs. Load ratings are dynamic C / static C0 in kN; thermal reference speed is oil / grease in rpm:

Choosing between EJ and EM cages and the suffixes to order

The EJ steel cage is the standard choice up to 600 mm outside diameter and is available in all sizes shown. The brass EM cage is offered for severe shock, vibration, high acceleration or marginal lubrication; in the sample sizes the EM version shows slightly lower or equal ratings than EJ (for example 22208 EM is listed at 99.6 / 93.4 kN against 104 / 99.7 kN for EJ) but different speed values, so compare the catalogue line for the exact part. A tapered-bore K bearing is mounted on an adapter or withdrawal sleeve; the cylindrical-bore version needs a press or shrink fit on the shaft.

Clearance, cage, bore and lubrication suffixes are added to the basic number, for example 22210EJW33C3. Timken also offers Solid Lube fills for these bearings, listed with their own maximum speeds. For a single worked part, see the Timken 22216EJW33 page on this site.

What to confirm before ordering

Confirm the full designation printed on the old bearing, cylindrical or tapered bore, clearance class, cage type, whether the W33 groove is wanted, the sleeve for K bearings, the operating speed and the housing it will sit in. Storage guidance in the catalogue: keep bearings in original packing, at 0 to 40 degrees Celsius and below 60 percent relative humidity, and never spin a bearing with compressed air. More bearings are listed under Electric Motors, Pumps and Turbines.

Documents and quotation

The attached Timken Spherical Roller Bearing Catalog (Order No. 10446) holds the full dimension, rating, mounting and fit tables. Send the designation, clearance class and quantity when requesting a quotation from Seven Star LLC, an independent supplier in Muscat.