22309 bearing: complete specifications & equivalents
The 22309 is a ISO 15 radial bearing sized 45 x 100 x 36 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 45 mm |
| Outer diameter D | 100 mm |
| Width B | 36 mm |
| Seal / shield | open |
| Internal clearance | CN / C3 / C4 available |
| Tolerance class | P0 |
| Cage | steel |
| Operating temperature | -30 to +120 °C |
| Mass (geometry estimate) | 1151 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 22309 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 22300-series range
| Bore d | 1.772 in |
|---|---|
| Outer diameter D | 3.937 in |
| Width B | 1.417 in |
| ISO bore code | 09 |
| Radial section height (D−d)/2 | 27.5 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) | 2 of 18 |
| Bore above smallest 22300-series size | 5 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22309 | 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 22309 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 22309 encode the bore: code 09 = 45 mm (code × 5 from 04 upward). The ISO 15 envelope is 100 mm outside diameter and 36 mm width — 1.772 × 3.937 × 1.417 in, with a 27.5 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 k5 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
- process crane travel wheels
- conveyor head and tail pulleys
- vibrating screens, feeders and shakeout machines
- paper machine felt and press rolls
- industrial gearbox and drive shafts
Known failure patterns
- lubricant starvation and cage wear where the relubrication interval ignores the slow-speed, dirty operating regime
- 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
Selection pitfalls — read before you substitute
- On this 45 mm-bore 22309, specify C3 clearance as the default for an interference inner-ring fit and verify residual play after mounting; a medium-section row that ran free on the bench can be fully clamped at operating temperature on the 45 mm shaft.
- The 223 heavy wide series at 45 mm bore (100×36 mm) is selected for shock and high radial load in screens and crushers; its 27.5 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22209 on the same journal.
- The 36 mm-wide 22309 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 45 mm bore and 100 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 27.5 mm section.
- For a cylindrical-bore 22309, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 45 mm shaft; cooling creates the interference, while hammering cold through the 100 mm assembly dents the sphered raceways.
- Read the damage pattern on a removed 22309: spalling concentrated on one side of the 100 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.
- Choose the bore type deliberately: plain 22309 takes a cylindrical seat, while the K variant has a 1:12 tapered bore and mounts on an adapter sleeve (H3xx series) over a plain commercial shaft or directly on a tapered journal — the two mounting procedures are not interchangeable.
- Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 45 mm-bore mounts use C3, vibrating screens use C4, and CN is mainly for loose/split-housing fits — the designation suffix states the class.
Frequently asked questions
What are the dimensions of a 22309 spherical roller bearing?
A 22309 double-row spherical roller bearing per ISO 15 has a 45 mm bore, 100 mm outer diameter and 36 mm width (1.772 × 3.937 × 1.417 in), a 27.5 mm radial section and roughly 1151 g geometry-based estimated mass; catalogue masses vary with cage and design.
How does the 22309 bore code work?
The leading 2 in 22309 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 09: 09 × 5 = 45 mm. The 100 mm OD and 36 mm width come from the dimension series (22300), not from the bore code alone.
How much misalignment can a 22309 accommodate?
Thanks to the sphered outer ring raceway, 22309 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 22309 and 22309K?
The plain 22309 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 22309 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.