22212 bearing: complete specifications & equivalents
The 22212 is a ISO 15 radial bearing sized 60 x 110 x 28 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Bore diameter d | 60 mm |
| Outer diameter D | 110 mm |
| Width B | 28 mm |
| Seal / shield | open |
| Internal clearance | CN / C3 / C4 available |
| Tolerance class | P0 |
| Cage | steel |
| Operating temperature | -30 to +120 °C |
| Mass (geometry estimate) | 954 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 22212 are being backfilled — use the inquiry form for certified values.
Dimensions in inches & 22200-series range
| Bore d | 2.362 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.102 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 25 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) | 8 of 22 |
| Bore above smallest 22200-series size | 35 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22212 | 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 22212 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 22212 encode the bore: code 12 = 60 mm (code × 5 from 04 upward). The ISO 15 envelope is 110 mm outside diameter and 28 mm width — 2.362 × 4.331 × 1.102 in, with a 25.0 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
- 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 60 mm-bore 22212, 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 60 mm shaft.
- The 222 medium series at 60 mm bore (110×28 mm, 25.0 mm section) is the default general-purpose spherical row; on the same bore a 22312 is larger and wider with far higher load rating — do not swap a failed 22312 down to a 22212 without re-rating life.
- The 28 mm-wide 22212 seats against shaft and housing shoulders whose fillet must clear the bearing chamfer: keep the corner radius small enough that the 60 mm bore and 110 mm OD faces abut square — an undercut beats an oversized radius, which lifts the ring and edge-loads the 25.0 mm section.
- For a cylindrical-bore 22212, warm the inner ring to 80–100 °C (induction heater, never a flame) and slide it dry to the shoulder of the 60 mm shaft; cooling creates the interference, while hammering cold through the 110 mm assembly dents the sphered raceways.
- Relubricate 22212 through the W33 groove while the shaft turns slowly so fresh grease flushes the full 28 mm-wide roller set; pumping grease into a stationary bearing channels it past one row and leaves the other side of the 60 mm bore starved.
- Specify W33 when the 28 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.
- Press 22212 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 110 mm assembly.
Frequently asked questions
What are the dimensions of a 22212 spherical roller bearing?
A 22212 double-row spherical roller bearing per ISO 15 has a 60 mm bore, 110 mm outer diameter and 28 mm width (2.362 × 4.331 × 1.102 in), a 25.0 mm radial section and roughly 954 g geometry-based estimated mass; catalogue masses vary with cage and design.
How does the 22212 bore code work?
The leading 2 in 22212 denotes a double-row spherical roller, the middle digits give the ISO 15 dimension series, and the last two digits are bore code 12: 12 × 5 = 60 mm. The 110 mm OD and 28 mm width come from the dimension series (22200), not from the bore code alone.
How much misalignment can a 22212 accommodate?
Thanks to the sphered outer ring raceway, 22212 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 22212 and 22212K?
The plain 22212 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 22212 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.