22330 bearing: complete specifications & equivalents
The 22330 is a ISO 15 radial bearing sized 150 x 320 x 108 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 150 mm |
| Outer diameter D | 320 mm |
| Width B | 108 mm |
| Seal / shield | open |
| Internal clearance | CN / C3 / C4 available |
| Tolerance class | P0 |
| Cage | steel |
| Operating temperature | -30 to +120 °C |
| Mass (geometry estimate) | 34581 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 22330 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 22300-series range
| Bore d | 5.906 in |
|---|---|
| Outer diameter D | 12.598 in |
| Width B | 4.252 in |
| ISO bore code | 30 |
| Radial section height (D−d)/2 | 85 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) | 18 of 18 |
| Bore above smallest 22300-series size | 110 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22330 | 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 22330 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 22330 encode the bore: code 30 = 150 mm (code × 5 from 04 upward). The ISO 15 envelope is 320 mm outside diameter and 108 mm width — 5.906 × 12.598 × 4.252 in, with a 85.0 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
- paper machine drying cylinders
- large gear drives and mill pinions
- heavy conveyor drum pulleys
- cement and aggregate processing machinery
- mining and aggregate vibrating screens
Known failure patterns
- roller smearing and skid marks when the radial load falls below the minimum load needed to drive the roller set
- cage fatigue and fracture on vibratory screens supplied with normal CN clearance instead of a vibratory C4 fit
- fretting corrosion on a tapered-bore sleeve seat when drive-up is insufficient and the inner ring works on the adapter
- 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
Selection pitfalls — read before you substitute
- The large 150 mm-bore 22330 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 108 mm double-row assembly cannot be drifted into position without brinelling.
- The 223 heavy wide series at 150 mm bore (320×108 mm) is selected for shock and high radial load in screens and crushers; its 85.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22230 on the same journal.
- The 108 mm-wide 22330 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 150 mm bore and 320 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 85.0 mm section.
- For a cylindrical-bore 22330, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 150 mm shaft; cooling creates the interference, while hammering cold through the 320 mm assembly dents the sphered raceways.
- Read the damage pattern on a removed 22330: spalling concentrated on one side of the 320 mm outer race points to misalignment or thrust overload, while uniform roller-end smearing means minimum-load skidding — the two failures demand opposite corrections.
- In a classic two-bearing arrangement the 22330 often serves as the non-locating (floating) bearing, taking radial load while the housing bore lets it drift; it can locate axially in both directions, but sustained pure thrust beyond the catalogue limit unloads one roller row.
- Self-aligning is not a licence to ignore alignment: 22330 accommodates typically around 1° of angular misalignment under normal load (roughly 2° only in favourable, light-load conditions) — the exact figure falls with load, so check the catalogue value rather than designing to the maximum.
Frequently asked questions
What are the dimensions of a 22330 spherical roller bearing?
A 22330 double-row spherical roller bearing per ISO 15 has a 150 mm bore, 320 mm outer diameter and 108 mm width (5.906 × 12.598 × 4.252 in), a 85.0 mm radial section and roughly 34581 g geometry-based estimated mass; catalogue masses vary with cage and design.
How does the 22330 bore code work?
The leading 2 in 22330 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 30: 30 × 5 = 150 mm. The 320 mm OD and 108 mm width come from the dimension series (22300), not from the bore code alone.
How much misalignment can a 22330 accommodate?
Thanks to the sphered outer ring raceway, 22330 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 22330 and 22330K?
The plain 22330 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 22330 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.