NSK22216KE4C3Double-Row Spherical Roller Bearing, 80 x 140 x 33 mm, 1:12 Tapered Bore, W33 Lubrication, C3 Clearance

Product Description

What this part is

A 22216 K E4 C3 double-row spherical roller bearing measuring 80 mm bore x 140 mm outside diameter x 33 mm wide, carrying the Hoover marking and built to NSK’s designation system. It has a 1:12 tapered bore, 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.
K — tapered bore, taper 1:12.
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.

Hoover is a legacy US bearing brand whose bearing business became part of NSK, which is why a Hoover-marked ring carries NSK order codes such as E4. If you are searching a maintenance BOM, the Hoover number and the NSK number describe the same bearing.

What these specs mean in practice

The tapered bore is the single most important thing to get right on this listing. A 1:12 taper is a mounting system, not a shaft fit. On a plain cylindrical shaft the bearing sits on an H316 adapter sleeve (or is withdrawn with an AH316 withdrawal sleeve), and the sleeve is what sets the interference: you drive the bearing up the taper until the internal clearance has been reduced by the amount the design calls for, then lock it with a KM16 locknut and MB16 lockwasher. Because the sleeve carries the shaft, the shaft seat under an H316 is 70 mm, not 80 mm. Alternatively the bearing mounts directly on a machined 1:12 tapered shaft seat with no sleeve. Either way, drive-up and residual clearance must be measured — driven too far up the taper the bearing is preloaded, runs hot and fails early.

C3 pairs with the tapered bore for a reason. Drive-up deliberately consumes internal clearance, so tapered-bore bearings are usually supplied looser than normal so there is something left to give away at mounting. Starting from C3 gives a wider usable drive-up window and sensible operating clearance once the shaft and housing are hot.

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.

Published mounting data for the 80 x 140 x 33 envelope

Bore d: 80 mm (1:12 taper)
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. 2.1 kg
Number of rows: 2
Precision: ISO normal class (ABEC 1 / P0)
Matching adapter sleeve: H316 (70 mm shaft); withdrawal sleeve AH316

Quantity and configuration

One bearing per sale — 1 Pc. What ships is the complete non-separable bearing: inner ring with the 1:12 tapered bore, two rows of spherical rollers, cage and outer ring with the oil groove and lubrication holes. The H316 adapter sleeve, AH316 withdrawal sleeve, KM16 locknut, MB16 lockwasher and housing are separate items and are not included. If your shaft is not already machined with a 1:12 taper, you need the sleeve to mount this bearing.

Fitting notes

Measure the unmounted radial internal clearance with a feeler gauge before you start, then drive the bearing up the taper and re-measure until the clearance reduction matches the mounting table for the fit you want. Support and drive against the inner ring only; the outer ring swivels and will cock the rollers if used to drive the assembly. Align the housing grease port with the outer ring groove before final assembly. 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, and the tapered-bore version takes the same H316 sleeve across every brand. Direct equivalents for a tapered-bore, relubricatable 22216 with C3 clearance: NSK 22216 CDKE4C3 (pressed steel cage) or 22216 CAMKE4C3 (machined brass cage), SKF 22216 CCK/C3W33 or 22216 EK/C3W33, FAG 22216-E1-K-C3, NTN and NTN-SNR 22216 EAKW33C3, Timken 22216 KEJW33C3, Koyo 22216RHKW33C3, RHP 22216 EKJW33C3. 22216 M and 22216 MB are carried on this listing as brass-cage cage codes in the FAG and SKF families for the same envelope; treat them as a size and configuration match whose cage may differ from what is in the box. A version without the K suffix has a straight cylindrical bore and needs no sleeve; a version without E4 or W33 cannot be regreased through the housing.