22326 bearing: complete specifications & equivalents
The 22326 is a ISO 15 radial bearing sized 130 x 280 x 93 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 130 mm |
| Outer diameter D | 280 mm |
| Width B | 93 mm |
| Seal / shield | open |
| Internal clearance | CN / C3 / C4 available |
| Tolerance class | P0 |
| Cage | steel |
| Operating temperature | -30 to +120 °C |
| Mass (geometry estimate) | 22921 g |
| Standard | ISO 15 |
| Catalog version | iso15-srb-geometry |
| Last verified | 2026-09-24 |
Source: ISO 15 boundary-dimensions standard · extracted 2026-09-24
Standard-interchange bearing: dimensions per ISO 15; CN clearance, P0 tolerance and a stamped-steel cage are catalogue defaults unless the supplier states otherwise, and mass is a geometry-derived estimate. Brand catalogue load ratings and limiting speeds for 22326 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 22300-series range
| Bore d | 5.118 in |
|---|---|
| Outer diameter D | 11.024 in |
| Width B | 3.661 in |
| ISO bore code | 26 |
| Radial section height (D−d)/2 | 75 mm |
| Smallest bore in 22300-series | 40 mm |
| Largest outer diameter in 22300-series | 320 mm |
| Width range across 22300-series | 33–108 mm |
| Bore position in 22300-series (smallest first) | 16 of 18 |
| Bore above smallest 22300-series size | 90 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22326 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; brand-specific OEM equivalents (NSK/FAG/NTN) pending multi-source data. |
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 22326 model number is decoded
In the 22300-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22326 encode the bore: code 26 = 130 mm (code × 5 from 04 upward). The ISO 15 envelope is 280 mm outside diameter and 93 mm width — 5.118 × 11.024 × 3.661 in, with a 75.0 mm radial section height. Two rows of symmetrical barrel rollers on a common sphered outer raceway self-align to shaft deflection while carrying heavy radial load and bidirectional axial load. Typical catalogue practice for a rotating inner ring is a m6 shaft seat, H7 housing and C3 internal clearance; K variants use a 1:12 tapered bore on an adapter sleeve — verify against the mounting arrangement.
Typical equipment & failure modes
Common applications
- heavy conveyor drum pulleys
- cement and aggregate processing machinery
- mining and aggregate vibrating screens
- jaw and cone crusher eccentric shafts
- paper machine drying cylinders
Known failure patterns
- water and grit pitting of open bearings in mining and pulping duty after the housing seals degrade
- unloaded-row scuffing when pure thrust exceeds the catalogue axial capacity and one roller row unloads completely
- thermal seizure when an interference shaft fit plus hot running removes all residual radial clearance from a CN bearing
- raceway and roller spalling after the L10 life or from sustained overload and shock in crusher duty
- roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set
Selection pitfalls — read before you substitute
- The large 130 mm-bore 22326 mounts with real force: use induction heating or hydraulic drive-up on the tapered seat, measure residual clearance in micrometres, and plan lifting fixtures — the 93 mm double-row assembly cannot be drifted into position without brinelling.
- The 223 heavy wide series at 130 mm bore (280×93 mm) is selected for shock and high radial load in screens and crushers; its 75.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22226 on the same journal.
- Check the shoulder geometry for 22326: a generous fillet on the 130 mm shaft looks strong but stops the 93 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 75.0 mm-section outer ring presses flush in the 280 mm housing.
- Large 22326 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 93 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).
- Relubricate 22326 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 93 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 130 mm bore starved.
- Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 130 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.
- Specify W33 when the 93 mm-wide bearing must be relubricated in place: it is the outer-ring annular groove with lubrication holes; without W33 grease only reaches the contacts through the shaft or housing arrangement.
Frequently asked questions
What are the dimensions of a 22326 spherical roller bearing?
A 22326 double-row spherical roller bearing per ISO 15 has a 130 mm bore, 280 mm outer diameter and 93 mm width (5.118 × 11.024 × 3.661 in), a 75.0 mm radial section and roughly 22921 g geometry-based estimated mass; catalogue masses vary with cage and design.
How does the 22326 bore code work?
The leading 2 in 22326 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 26: 26 × 5 = 130 mm. The 280 mm OD and 93 mm width come from the dimension series (22300), not from the bore code alone.
How much misalignment can a 22326 accommodate?
Thanks to the sphered outer ring raceway, 22326 normally accommodates angular misalignment of around 1° under load (up to about 2° in favourable, lightly loaded conditions); the permissible value is smaller under full load and depends on clearance and cage design, so check the catalogue figure for the actual duty.
What is the difference between 22326 and 22326K?
The plain 22326 has a cylindrical bore for a straight shaft seat. The K suffix denotes a 1:12 tapered bore, normally mounted on an H3xx adapter sleeve over a commercial shaft (or directly on a tapered journal); the bearing is driven up the sleeve to a specified residual clearance and locked with a KM nut and tab washer.
Should the 22326 be ordered with CN, C3 or C4 clearance?
Use C3 as the usual default when the rotating inner ring has an interference fit, because the fit plus thermal expansion reduces residual play; choose C4 (often with a vibratory cage design) for screens and feeders; order CN mainly for loose fits on stationary shafts or split housings. A W33 outer-ring lubrication groove is a separate, commonly combined option.
Reviewed & verified by the MPN Base engineering desk against source catalog iso15-srb-geometry on 2026-09-24. Read our editorial & correction policy.