22310 bearing: complete specifications & equivalents
The 22310 is a ISO 15 radial bearing sized 50 x 110 x 40 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 50 mm |
| Outer diameter D | 110 mm |
| Width B | 40 mm |
| Seal / shield | open |
| Internal clearance | CN / C3 / C4 available |
| Tolerance class | P0 |
| Cage | steel |
| Operating temperature | -30 to +120 °C |
| Mass (geometry estimate) | 1539 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 22310 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 22300-series range
| Bore d | 1.969 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.575 in |
| ISO bore code | 10 |
| Radial section height (D−d)/2 | 30 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) | 3 of 18 |
| Bore above smallest 22300-series size | 10 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22310 | 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 22310 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 22310 encode the bore: code 10 = 50 mm (code × 5 from 04 upward). The ISO 15 envelope is 110 mm outside diameter and 40 mm width — 1.969 × 4.331 × 1.575 in, with a 30.0 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 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
- conveyor head and tail pulleys
- vibrating screens, feeders and shakeout machines
- paper machine felt and press rolls
- industrial gearbox and drive shafts
- elevator winches and hoist drums
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
- On this 50 mm-bore 22310, 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 50 mm shaft.
- The 223 heavy wide series at 50 mm bore (110×40 mm) is selected for shock and high radial load in screens and crushers; its 30.0 mm section needs correspondingly wider shaft and housing shoulders and a stiffer shaft than a 22210 on the same journal.
- Before fitting 22310, machine the 50 mm shaft seat and 110 mm housing bore with a relief or small fillet so nothing bridges the bearing chamfer; the 40 mm-wide rings only load correctly when the full faces abut, and a large radius pinches the 30.0 mm radial section.
- On a K tapered bore with adapter sleeve, tighten the KM locknut to drive the 22310 up the sleeve, rotating the inner ring, and stop on residual clearance — measured with feelers at the unloaded rollers — not on torque alone; then lock the tab washer so the 50 mm seat cannot creep.
- When reusing a sleeve-mounted 22310, inspect the adapter and lock parts together with the bearing: a stretched sleeve or a bent lockwasher tab that let the inner ring creep on the 50 mm journal must be replaced, or the new bearing frets the same seat.
- Order clearance for the mounting method: an interference fit on a rotating inner ring plus thermal growth eats into CN play, so most industrial 50 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 40 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 22310 spherical roller bearing?
A 22310 double-row spherical roller bearing per ISO 15 has a 50 mm bore, 110 mm outer diameter and 40 mm width (1.969 × 4.331 × 1.575 in), a 30.0 mm radial section and roughly 1539 g geometry-based estimated mass; catalogue masses vary with cage and design.
How does the 22310 bore code work?
The leading 2 in 22310 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 10: 10 × 5 = 50 mm. The 110 mm OD and 40 mm width come from the dimension series (22300), not from the bore code alone.
How much misalignment can a 22310 accommodate?
Thanks to the sphered outer ring raceway, 22310 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 22310 and 22310K?
The plain 22310 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 22310 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.