KoyoDouble-Row Spherical Roller Bearing, 80 x 140 x 33 mm, Straight Bore, Machined Brass Cage, C4 Clearance

Product Description

What this part is

A Koyo 22216R double-row spherical roller bearing measuring 80 mm bore x 140 mm outside diameter x 33 mm wide. Straight cylindrical bore, open, machined brass cage, C4 radial internal clearance. Spherical roller bearings carry very high radial load plus axial load in both directions, and the spherical outer raceway lets the inner-ring assembly swivel so the bearing self-aligns to shaft deflection or housing misalignment.

Decoding the designation

222: double-row spherical roller bearing, ISO dimension series 22. 16: bore code, 16 x 5 = 80 mm bore. R: Koyo internal design, two rows of convex asymmetrical rollers separated by a central rib on the inner ring, held in a machined copper-alloy (brass) prong-type cage. C4: radial internal clearance greater than C3, which is itself greater than normal. Bore Type: straight cylindrical, mounting directly on the shaft seat.

Specifications

Manufacturer: Koyo / JTEKT Corporation. Part Number: 22216RC4. Base Number: 22216. Bearing Type: spherical roller bearing, double row. Series: 222, ISO dimension series 22. Bore (d): 80 mm. Outside Diameter (D): 140 mm. Width (B): 33 mm. Bore Type: straight cylindrical. Number of Rows: 2. Rolling Elements: convex asymmetrical spherical rollers with a central inner-ring rib. Cage Type: machined prong-type cage, roller guided (Koyo R design). Cage Material: machined copper alloy (brass). Internal Clearance: C4. Closure Type: open, both sides. Precision Class: ISO normal (ABEC 1 / P0). Basic Dynamic Load Rating (Cr): 271 kN. Basic Static Load Rating (C0r): 271 kN. Fatigue Load Limit (Cu): 30.5 kN. Limiting Speed, Grease Lubrication: 3,300 rpm. Limiting Speed, Oil Lubrication: 4,400 rpm. Lubricant: grease or oil. Constant e: 0.22. Axial Load Factor Y1: 3.07. Axial Load Factor Y2: 4.57. Axial Load Factor Y0: 3.00. Chamfer (r min): 2 mm. Fillet (ra max): 2 mm. Shaft Abutment (da min): 90 mm. Housing Abutment (Da max): 130 mm. Permissible Angular Misalignment: 1.5°. Mass: 2.17 kg / 4.78 lb. Bearing Material: through-hardened bearing steel. Design Units: metric. Harmonization Code: 8482.30. Country of Origin: Japan.

What these specifications mean in practice

A machined brass prong cage runs cooler and tolerates higher speed, shock and marginal lubrication than a pressed steel cage, which is why it is specified where the bearing sees vibration or repeated start-stop duty. In the R design, asymmetrical rollers running against a central inner-ring rib give the highest speed capability in the Koyo spherical range; the guide-ring RH design uses that axial space for longer rollers and higher load capacity in the same envelope. C4 extra clearance accommodates a heavy interference fit, a large inner-to-outer ring temperature difference or thermal growth in the housing, all of which consume clearance at operating temperature. The axial load factors e 0.22, Y1 3.07, Y2 4.57 and Y0 3.00 are the figures used to resolve a combined load into an equivalent dynamic or static load. The bearing runs on grease or on oil, and Koyo publishes a limiting speed for each: 3,300 rpm on grease, 4,400 rpm on oil.

Quantity and configuration

Unit Quantity: 1 Pc. One complete non-separable bearing: inner ring with central rib, two rows of asymmetrical rollers, machined brass cage and outer ring.

Interchange guidance

The 80 x 140 x 33 mm 222-series envelope is industry-standard, so a 22216 in another maker’s nomenclature fits the same seat. The closest cage-for-cage matches are SKF 22216 CA/C4 and NSK 22216CAMC4, both machined brass. 22216C, 22216CC, 22216CJ and 22216CCJ are the same envelope in SKF nomenclature with two stamped steel cages on symmetrical rollers. 22216E is the same envelope in a later high-capacity internal design carrying its own load ratings. SKF’s machined-brass-cage spherical roller designs are CA and CAC, NSK’s is CAM, NTN and NTN-SNR use EM, Timken uses EM or EMB. 53516 is the GOST designation for the same envelope.