SKF22219-CCK/W33Double-Row Spherical Roller Bearing, 95 mm Tapered Bore (1:12) x 170 mm O.D. x 43 mm Wide, Outer-Ring Lubrication Groove and 3 Holes — Adapter Sleeve Not Included

Product Description

What this part is

A double-row spherical roller bearing: two rows of barrel-shaped rollers running on a common spherical raceway ground into the outer ring. That geometry is what makes it self-aligning — the inner ring, rollers and cages can swivel a couple of degrees inside the outer ring, so the bearing tolerates shaft deflection, housing misalignment and out-of-line pillow blocks without the roller ends being crushed. It also carries very heavy radial load plus axial load in both directions, which is why spherical rollers dominate crushers, screens, fans, conveyor pulleys, paper machine rolls and vibrating equipment.

The tapered bore is the critical spec — read this first:
The K in this designation means the bore is tapered, 1:12, not cylindrical. This is the single most important thing to understand before ordering, because it changes how the bearing is mounted and what else you need to buy.

A tapered-bore bearing cannot be pushed onto a plain straight shaft and clamped. It has to be drawn up either onto a matching 1:12 tapered seat machined into the shaft, or onto an adapter sleeve — a thin tapered sleeve that slips over a plain shaft, with the bearing driven up the taper by a lock nut. As you drive the bearing up the taper, the inner ring expands and the radial internal clearance reduces. That is the whole point: with a tapered bore you set the operating clearance during mounting by measuring how far the ring advances or how much the clearance drops, rather than relying on a fixed interference fit. Drive it too far and the bearing runs with no clearance, overheats and fails quickly; too little and the inner ring creeps on the sleeve.

No adapter sleeve is included in this listing. The photographs show the bearing in its poly bag alongside its SKF carton and nothing else — no sleeve, no lock nut, no lock washer. For a plain shaft you would order an SKF H 319 adapter sleeve, which fits this 95 mm tapered bore onto an 85 mm plain shaft and is supplied with its KM lock nut and MB lock washer; for a stepped shaft the equivalent withdrawal-sleeve arrangement is the AH 319. If your shaft already has a 1:12 taper machined on it, you need no sleeve at all — but then the shaft diameter at the seat, not 85 mm, is what governs.

Decoding the designation

222 — double-row spherical roller bearing, ISO dimension series 22 (the medium-width series for this bore).
19 — bore code; multiply by 5 to get the bore, so 19 × 5 = 95 mm.
CC — SKF’s internal-design and cage designation for this family: two window-type pressed steel cages with a guide ring located on the inner ring, and the reduced-friction internal geometry SKF introduced over the earlier plain C design. CC is an SKF-specific code and does not mean the same thing on another maker’s part number, so do not read it across.
K — tapered bore, taper 1:12. See the section above.
W33 — a lubrication groove machined around the outside diameter of the outer ring, with three radial lubrication holes through into the bearing. This lets grease or oil be fed to the rollers through the housing while the bearing is running, instead of only at assembly. On a relubricatable pillow block or a plummer block with a grease fitting, W33 is what makes scheduled relubrication actually reach the raceway. If your housing has no feed passage, W33 costs you nothing — it simply goes unused.
No clearance suffix — this part carries normal (CN) radial internal clearance. A C3 version exists for hotter running or heavier interference; this is not it.
SKF Explorer — printed on the carton. SKF’s upgraded performance class, with cleaner steel, improved heat treatment and tighter geometry than the standard product, giving longer calculated life at the same envelope. It is a real premium designation, not marketing on the box.

Correcting the source data

The previous copy on this listing carried a garbled model string reading “22229CCKJ / 22219 EKJ W33 / 22219 C K J W33”. Those are not this bearing. 22229 is a 145 mm bore bearing, an entirely different size. EK is a different SKF internal design from CC, and the trailing J is not part of the SKF spherical roller suffix system at all. The carton and this record agree on the correct designation: 22219 CCK/W33. The old copy also claimed the bearing originated in the United States; SKF makes this family in several countries and we cannot read a country of origin from the photographs, so no origin is claimed here.

Published ratings

Boundary dimensions are confirmed against the carton and the SKF designation system and are certain. The load ratings below are as published by industrial distributors carrying this exact SKF designation; SKF’s own product pages are JavaScript-driven and could not be read directly, so treat the rating figures as provisional and confirm against SKF’s catalogue if your calculation is marginal.

Bore d: 95 mm (tapered, 1:12)
Outside diameter D: 170 mm
Width B: 43 mm
Basic dynamic load rating C: 405 kN (distributor-published)
Basic static load rating C0: 455 kN (distributor-published)
Limiting speed: approximately 4,800 r/min (distributor-published)
Radial internal clearance: normal (CN)
Number of rows: 2
Rolling elements: spherical (barrel) rollers
Closure: open, non-sealed — sealing is the housing’s job

Not stated here because it is not published on a source we trust for this designation: fatigue load limit Pu, permissible misalignment angle, cage weight, and the numeric width and diameter of the W33 groove and holes. We would rather leave those blank than borrow figures from a look-alike listing.

Quantity and configuration

One bearing. Bearing only — no adapter sleeve, no lock nut, no lock washer, no housing. New, in the original SKF Explorer carton.

Fitting notes

Mount by drawing the bearing up the taper and control the result by measurement, not by feel. Either check the reduction in radial internal clearance with a feeler gauge across the unloaded roller row as you tighten, or measure the axial drive-up distance on the sleeve; SKF publishes both methods and target values per size. A hydraulic nut makes this far more repeatable than a hook wrench on a large bearing. Do not heat-fit a tapered-bore bearing onto a sleeve — the clearance setting is the mounting. If the housing has a relubrication passage, line it up with the W33 groove; the groove runs all the way round the outer ring, so radial orientation is not critical, but axial position is. Fill with the grease your duty requires before commissioning — the bearing ships with a preservative, not with an operating lubricant.

Interchange guidance

22219 is an ISO base number, so the same envelope is available from other makers: FAG/Schaeffler 22219-E1-K (add -C3 or the appropriate suffix for clearance), NSK 22219EAKE4, NTN 22219EAKD1, Timken 22219EJW33KC3, Koyo 22219RHRKW33. Watch two things when crossing: the K must be present or you are buying a straight-bore bearing that will not mount on your sleeve, and the W33 lubrication feature must be present if your housing relies on it. Also confirm clearance class matches — a C3 substitute in a normal-clearance application runs looser than designed. Because CC, E, EA and E1 are each maker-specific internal-design codes rather than an industry standard, cage and roller detail will differ between these crosses even where the boundary dimensions match exactly.