SNR22216EAKB33J30Double-Row Spherical Roller Bearing, 80 x 140 x 33 mm, 1:12 Tapered Bore, ULTAGE High-Capacity Design, W33 Lubrication, C3 Clearance, 200 C Rated

Product Description

What this part is

An SNR 22216 EA.K.B33.J30 double-row spherical roller bearing measuring 80 mm bore x 140 mm outside diameter x 33 mm wide. This is NTN-SNR’s ULTAGE high-capacity design with a 1:12 tapered bore, a lubrication groove and three 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.
EA — NTN-SNR ULTAGE increased-capacity design: symmetrical rollers, no central inner-ring rib (so the rollers run longer and lubricant flows through the middle of the bearing), optimised internal geometry to cut friction and heat, and steel stabilised for use to +200 °C. The A specifies two window-type drawn steel cages centred on the ground surface of the inner ring, each roller guided by a four-tang pocket.
K — tapered bore, taper 1:12.
B33 — SNR’s code for a lubrication groove and holes in the outer ring. It is the direct equivalent of the industry W33 code, which is why the title carries both.
J30 — SNR clearance and precision code. The first digit is the ISO radial internal clearance class, so 3 = C3, greater than normal. The second digit is the ISO precision class, so 0 = normal class. J20 = C2, J30 = C3, J40 = C4, J50 = C5.

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 On a plain cylindrical shaft the bearing sits on an H316 adapter sleeve (or is withdrawn with an AH316 withdrawal sleeve), and the sleeve is what sets the interference: you drive the bearing up the taper until the internal clearance has been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.

The ULTAGE EA design is where the load rating comes from. Deleting the central rib lets both roller rows use the full width, and the window-type pressed steel cage is stiffer than a conventional pressed cage while staying light. That combination is what puts this bearing’s dynamic rating at 277 kN in a 33 mm wide envelope.

The lubrication groove and holes only pay off if the housing has a matching grease feed. Line the housing port up with the outer ring groove and fresh grease is pushed straight into the centre of both roller rows, which is what lengthens relubrication intervals. Feed it from the side instead and the groove does nothing.

Published ratings and mounting data

Basic dynamic radial load rating Cr: 277 kN
Basic static radial load rating C0r: 286 kN
Fatigue load limit Cu: 33.7 kN
Reference speed (grease): 4 300 rpm
Limiting speed (oil): 5 800 rpm
Bore d: 80 mm (1:12 taper)
Outside diameter D: 140 mm
Width B: 33 mm
Chamfer rs min: 2 mm; fillet ra max: 2 mm
Shaft abutment da min: 91 mm; housing abutment Da max: 129 mm
Inner ring shoulder d2: 94.9 mm; outer ring shoulder D1: 126.7 mm
Outer ring lubrication groove width: 7.87 mm; lubrication hole diameter: 3.5 mm; three holes
Axial load factors: e 0.22, Y1 3.14, Y2 4.67, Y0 3.07
Permissible angular misalignment: 1.5°
Operating temperature: −40 °C to +200 °C
Mass: approx. 2.04 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 symmetrical rollers, two window-type pressed steel cages, and outer ring with the lubrication groove and three 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, so check the load case rather than the rating alone. Grease fill is typically 30–50% of free space.

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, steel-cage, relubricatable 22216 with C3 clearance: NTN 22216EAKW33C3 (the same ULTAGE design under the NTN name), SKF 22216 EK/C3W33, FAG 22216-E1-K-C3, NSK 22216 CDKE4C3, Timken 22216 KEJW33C3, Koyo 22216RHKW33C3. 22216E is carried on this listing as the E-design base number for the same envelope. 53516 is the GOST designation. A version without the K suffix has a straight cylindrical bore and needs no sleeve; a version without B33 or W33 cannot be regreased through the housing; a brass-caged version carries EM in SNR nomenclature.