22205 bearing: complete specifications & equivalents
The 22205 is a ISO 15 radial bearing sized 25 x 52 x 18 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 25 mm |
| Outer diameter D | 52 mm |
| Width B | 18 mm |
| Seal / shield | open |
| Internal clearance | CN / C3 / C4 available |
| Tolerance class | P0 |
| Cage | steel |
| Operating temperature | -30 to +120 °C |
| Mass (geometry estimate) | 150 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 22205 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 22200-series range
| Bore d | 0.984 in |
|---|---|
| Outer diameter D | 2.047 in |
| Width B | 0.709 in |
| ISO bore code | 05 |
| Radial section height (D−d)/2 | 13.5 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) | 1 of 22 |
| Bore above smallest 22200-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22205 | 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 22205 model number is decoded
In the 22200-series (ISO 15 dimension series) the leading 2 marks a double-row spherical roller and the last two digits of 22205 encode the bore: code 05 = 25 mm (code × 5 from 04 upward). The ISO 15 envelope is 52 mm outside diameter and 18 mm width — 0.984 × 2.047 × 0.709 in, with a 13.5 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
- light-duty gearbox output shafts
- small conveyor idler and pulley rolls
- light vibrating screens and sifters
- agricultural elevator and feeder shafts
- small industrial fan rotors
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
- At 25 mm bore the small 22205 is often delivered sealed (2CS) and grease-filled for life in conveyor idlers — do not add grease nipples to a sealed row; for the open version, keep housing seals effective because the 18 mm cavity holds little oil reserve.
- The 222 medium series at 25 mm bore (52×18 mm, 13.5 mm section) is the default general-purpose spherical row; on the same bore a 22305 is larger and wider with far higher load rating — do not swap a failed 22305 down to a 22205 without re-rating life.
- Check the shoulder geometry for 22205: a generous fillet on the 25 mm shaft looks strong but stops the 18 mm inner ring seating home; use the catalogue corner-relief radius and provide a withdrawal groove so the 13.5 mm-section outer ring presses flush in the 52 mm housing.
- Large 22205 tapers should be mounted with a hydraulic nut or oil injection: controlled drive-up sets the residual radial clearance on the 18 mm-wide double row, whereas bar-and-spanner force either under-drives (fretting) or over-drives (thermal seizure on first hot run).
- When reusing a sleeve-mounted 22205, 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 25 mm journal must be replaced, or the new bearing frets the same seat.
- Press 22205 using the right ring: force on the inner ring for an interference shaft fit and on the outer ring for a housing fit — transmitting mounting force through the barrel rollers brinells the sphered raceways of the 52 mm assembly.
- Match the cage to the duty: the E/CC stamped window-steel cage is the standard for general 22205 service, while the machined brass CA cage is preferred for heavy shock and vibratory applications — never replace a CA row with a CC row in a screen or crusher without re-rating.
Frequently asked questions
What are the dimensions of a 22205 spherical roller bearing?
A 22205 double-row spherical roller bearing per ISO 15 has a 25 mm bore, 52 mm outer diameter and 18 mm width (0.984 × 2.047 × 0.709 in), a 13.5 mm radial section and roughly 150 g geometry-based estimated mass; catalogue masses vary with cage and design.
How does the 22205 bore code work?
The leading 2 in 22205 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 05: 05 × 5 = 25 mm. The 52 mm OD and 18 mm width come from the dimension series (22200), not from the bore code alone.
How much misalignment can a 22205 accommodate?
Thanks to the sphered outer ring raceway, 22205 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 22205 and 22205K?
The plain 22205 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 22205 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.