NSK22216CDE4C3Double-Row Spherical Roller Bearing, 80 x 140 x 33 mm, Straight Bore, Pressed Steel Cage, Floating Guide Ring, W33 Lubrication, C3 Clearance

Product Description

What this part is

An NSK 22216 CD E4 C3 double-row spherical roller bearing measuring 80 mm bore x 140 mm outside diameter x 33 mm wide. Straight (cylindrical) bore, open, pressed steel cage running on a floating guide ring, an oil groove and lubrication holes through the outer ring, and C3 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. Sold as 1 Pc.

Decoding the designation

222 — double-row spherical roller bearing, ISO dimension series 22.
16 — bore code; 16 x 5 = 80 mm bore.
CD — NSK internal design: floating guide ring with a pressed steel cage. NSK’s own interchange tables map CD directly onto the SKF C, CC and EC designs, so an SKF 22216 CC is a like-for-like design match rather than just a size match.
E4 — NSK’s code for an oil groove and lubrication holes in the outer ring. It is the direct equivalent of the industry W33 code, which is why the title carries both.
C3 — radial internal clearance greater than normal.
No K in the designation — straight cylindrical bore. No adapter sleeve is involved.

What these specs mean in practice

The floating guide ring is what makes CD a high-capacity layout. With no fixed central rib on the inner ring, the two roller rows are separated by a ring that floats between them, so the full axial width goes into roller length instead of into a rib. The pressed steel cage keeps the assembly light and low-friction, which is why CD is the general-purpose choice; step up to the brass-caged CA family when the position sees heavy shock or vibration.

One detail NSK publishes that most sellers skip: the depth of the oil groove in E4 bearings is limited, so NSK recommends machining an oil groove in the housing bore as well. Without it you are relying on a shallow groove to distribute grease around the full circumference, and the far side of the bearing sees less. If you are putting this into a housing you control, cut the groove.

C3 is chosen deliberately, not as an upgrade. Extra clearance absorbs a heavy interference fit on the shaft, a large temperature difference between inner and outer ring, or thermal growth in the housing — all of which eat clearance once the machine is hot. Fitting C3 where normal clearance was specified leaves a lightly loaded bearing able to skid its rollers rather than roll them, which polishes the raceway and shortens life.

Published mounting data for the 80 x 140 x 33 envelope

Bore d: 80 mm
Outside diameter D: 140 mm
Width B: 33 mm
Chamfer r min: 2 mm; fillet ra max: 2 mm
Shaft abutment da min: 91 mm; housing abutment Da max: 129 mm
Axial load factors: e 0.22, Y1 3.14, Y2 4.67, Y0 3.07
Permissible angular misalignment: 1.5°
Mass: approx. 2.0 kg
Number of rows: 2
Precision: ISO normal class (ABEC 1 / P0)

Quantity and configuration

One bearing per sale — 1 Pc. Complete non-separable bearing: inner ring, two rows of spherical rollers, pressed steel cage, floating guide ring and outer ring with the oil groove and lubrication holes. No housing, no locknut and no sleeve are included, and none are needed for a cylindrical shaft seat.

Fitting notes

Straight-bore spherical roller bearings mount with an interference fit on the shaft. Heat the bearing or use a hydraulic fit-up tool; drive against the inner ring only, never through the outer ring, because the outer ring can swivel and will cock the rollers. Align the housing grease port with the outer ring groove before final assembly, and cut a matching groove in the housing bore if you can. Keep the axial component well below the radial load: with Fa/Fr above e = 0.22 the unloaded roller row can lose contact and skid. Grease fill is typically 30–50% of free space; overpacking a spherical roller bearing is a common cause of an early temperature rise.

Interchange guidance

The 80 x 140 x 33 mm 222-series envelope is industry-standard. Because NSK maps CD onto the SKF C / CC / EC designs, the closest interchanges are genuine design matches, not just size matches: SKF 22216 CC/C3W33, 22216 CCJ/C3W33, 22216 CJ/C3W33 and 22216 C/C3W33 all describe a flangeless-inner-ring, guide-ring, stamped-steel-cage 22216 with the lubrication groove and three holes. Others in the same design family: FAG 22216-E1-C3, Timken 22216 EJW33C3, Koyo 22216RHW33C3, NTN and NTN-SNR 22216 EAW33C3, RHP 22216 EJW33C3. A brass-caged version — NSK 22216 CAM E4 C3, SKF 22216 CA/C3W33 — is a size and design match with a different cage, which matters in a shock-loaded position. 53516 is the GOST designation for the same envelope.