22226-EK bearing: complete specifications & equivalents
The 22226-EK is a ISO 15 radial bearing sized 130 x 230 x 64 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 130 mm |
| Outer diameter D | 230 mm |
| Width B | 64 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 758 kN |
| Basic static load rating C0 | 930 kN |
| Fatigue load limit Pu | 88 kN |
| Reference speed (thermal) | 2600 rpm |
| Limiting speed (mechanical) | 3600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 14000 g |
| Manufacturer designation | SKF 22226 EK |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & 22200-series range
| Bore d | 5.118 in |
|---|---|
| Outer diameter D | 9.055 in |
| Width B | 2.52 in |
| ISO bore code | 26 |
| Radial section height (D−d)/2 | 50 mm |
| Smallest bore in 22200-series | 25 mm |
| Largest outer diameter in 22200-series | 290 mm |
| Width range across 22200-series | 18–80 mm |
| Bore position in 22200-series (smallest first) | 19 of 22 |
| Bore above smallest 22200-series size | 105 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22226 | SKF | full Dimensions and internal design equivalent — standard interchange. | Tapered-bore (1:12) sleeve-mounted execution of 22226; identical ISO 15 envelope, fits H3126 adapter sleeve on a 110 mm shaft. |
| C2226 | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF CARB toroidal bearing C 2226 shares the 130×230×64 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute. |
| C2226-K | SKF | full Dimensions and internal design equivalent — standard interchange. | SKF CARB toroidal bearing C 2226 K shares the 130×230×64 mm envelope with ratings within 10 %; it self-aligns but floats axially and cannot locate the shaft — locating/non-locating pair, not a substitute. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the 22226-EK model number is decoded
The SKF 22226 EK is a 130×230×64 mm spherical roller bearing with a 1:12 tapered bore — SKF catalogue execution for sleeve mounting on a 130 mm plain shaft, retaining the double-row self-aligning barrel-roller design. Numbering ties the bearing to its envelope: 22226-ek means spherical-roller type, dimension series 22, 130 mm bore — which is why the 230×64 mm outline swaps dimensionally with other ISO 15 bearings of the same code. Note that K means 1:12 taper; the rarer K30 suffix means 1:30. Adapter sleeves (H) and withdrawal sleeves (AH) are ordered separately by shaft diameter, and the KM locknut plus MB lock washer used for drive-up are also separate components. With C 758 kN and C0 930 kN, the 22226-ek load check covers radial plus moderate axial in either direction — but below the minimum load the rollers skid, so verify P ≥ 0.01·C0 at the lightest operating point. After drive-up, re-check radial clearance and then swing the outer ring through its self-aligning range: the sphered raceway of the 22226-ek must still tilt ≈ 0.5–2.5° freely — a joint that binds after sleeve mounting signals excessive drive-up or a cocked sleeve.
Typical equipment & failure modes
Common applications
- heavy rolling-mill work-roll chocks
- large dredger and marine winch drums
- heavy crusher and screen shafts mounted and dismounted with hydraulic nuts
- long through-shafts in conveyors, where a sleeve seat avoids a precision journal
Known failure patterns
- raceway fatigue spalling of the sphered outer raceway after extended service above the catalogue L10 rating
- inner-ring raceway spalling from edge loading when misalignment exceeds the self-aligning recovery range
- fretting corrosion and sleeve-seat scoring when drive-up is insufficient and the tapered inner ring creeps on the adapter sleeve
- surface distress and smearing when the relubrication interval is exceeded — the W33 groove is only effective if grease actually reaches the roller rows
- electrical pitting on VFD-driven shafts without grounding protection
Selection pitfalls — read before you substitute
- At 130 mm bore the ring mass makes cocking during mounting a real risk; guide the bearing square, confirm seat contact around the full circumference, and re-check the self-aligning swing after the housing cap is torqued down.
- The 22200-series series at 130 mm bore (230×64 mm) is the general-purpose spherical roller envelope; stepping up to 223 adds capacity and width, stepping to 230 trims the OD — neither is interchangeable without re-checking shoulders and speed.
- Never apply the drive-up or clearance-reduction figures for this 1:12 tapered 22226-ek to a bearing of the other taper (1:12 vs 1:30); the steeper taper moves far less clearance per nut turn and the targets come from different catalogue tables.
- The 22226-ek and its cylindrical-bore counterpart 22226 share envelope and load ratings (758/930 kN) but are not interchangeable in a housing already fitted for direct shaft mounting — the sleeve changes the assembly stack-up.
- Open spherical roller bearings rely on the housing seals; in screening or crusher duty a failed seal lets grit into the sphered raceway and the 22226-ek pits long before its L10 life.
- The 758/930 kN ratings are SKF catalogue values for this tapered-bore execution (SKF 22226 EK); sleeve, KM nut and MB washer are separate order numbers, and the catalogue version (SKF catalogue PUB BU/P1 17000) should travel with the mounting specification.
Frequently asked questions
What are the dimensions and catalogue data of 22226-ek?
The SKF 22226 EK is a double-row spherical roller bearing with a 1:12 tapered bore, 130 mm nominal bore, 230 mm outer diameter and 64 mm width (5.118 × 9.055 × 2.52 in) per ISO 15. From SKF catalogue PUB BU/P1 17000: C 758 kN, C0 930 kN, Pu 88 kN, reference speed 2,600 r/min, limiting speed 3,600 r/min, mass about 14000 g. It is mounted on an adapter (H) or withdrawal (AH) sleeve, not directly on the shaft.
What does the K suffix mean on 22226-ek?
K marks a 1:12 tapered bore for sleeve mounting — SKF writes EK or CCK(/W33), FAG writes -K- inside the suffix chain for sleeve mounting. The bearing seats on an H-series adapter sleeve with a KM locknut and MB lock washer (plain shaft, h9 tolerance), or on an AH withdrawal sleeve against a shaft shoulder. The rarer K30 suffix would instead mean a 1:30 taper; dimension series 40/41 spherical rollers commonly use it.
Which adapter sleeve fits the 22226-ek?
The sleeve is selected by the actual shaft diameter in millimetres, not only by the 130 mm nominal bore: SKF H-sleeve numbers each cover a small shaft-diameter range and are width-series specific (H39/H30/H31/H32 matching dimension series 39/40/31/32), and each kit bundles the sleeve, KM locknut and MB lock washer. For shoulder locations use an AH withdrawal sleeve instead. Confirm the sleeve number against the SKF catalogue PUB BU/P1 17000 mounting tables for your shaft size.
How is the 22226-ek driven up and checked?
Mounting is controlled by radial-clearance reduction or axial drive-up distance from the SKF catalogue tables for the 1:12 taper, never by locknut torque. Measure clearance with feeler gauges before and after tightening the KM nut, stop at the tabulated decrease, and lock the MB washer tab. Over-drive removes too much clearance (inner-ring cracking risk); under-drive lets the sleeve creep and fret.
What is the difference between 22226-ek and 22226?
They share the ISO 15 envelope and the same 758/930 kN ratings, but 22226-ek has the 1:12 tapered bore for sleeve mounting on a plain shaft, while 22226 has a cylindrical bore for direct mounting on a machined interference journal (typically m6 with H7 housing). They are separate order numbers, not interchangeable in the same shaft arrangement.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 9.2 adapter-sleeve executions on 2026-09-26. Read our editorial & correction policy.