22205EMW33 bearing: complete specifications & equivalents
The 22205EMW33 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 |
|---|---|
| Brand | NTN |
| Bore diameter d | 25 mm |
| Outer diameter D | 52 mm |
| Width B | 18 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass, machined (M1) |
| Basic dynamic load rating C | 57.3 kN |
| Basic static load rating C0 | 46.1 kN |
| Fatigue load limit Pu | 3.23 kN |
| Limiting speed (mechanical) | 10400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 174 g |
| Manufacturer designation | NTN 22205EMW33 |
| Standard | ISO 15 |
| Catalog version | NTN Ball and Roller Bearings CAT.No.2203E |
| Last verified | 2026-10-01 |
Source: catalog reference (NTN Ball and Roller Bearings CAT.No.2203E) · extracted 2026-10-01
Parameters extracted from the official NTN Ball and Roller Bearings catalogue (NTN Ball and Roller Bearings CAT.No.2203E); NTN® is a trademark of NTN Corporation, used here for identification only — mpnbase is not an authorized NTN distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at ntnglobal.com.
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 | — |
| Radial section height (D−d)/2 | 13.5 mm |
| Smallest bore in 22200-series | 25 mm |
| Largest outer diameter in 22200-series | 580 mm |
| Width range across 22200-series | 18–150 mm |
| Bore position in 22200-series (smallest first) | 1 of 32 |
| Bore above smallest 22200-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 22205EMKW33 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 22200-series envelope, cage and ratings; this is the cylindrical-bore execution of the tapered-bore 22205EMKW33 (K/K30 sleeve or tapered-seat mounting). Verify shaft arrangement. |
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 22205EMW33 model number is decoded
22205EMW33 is an NTN double-row spherical roller bearing: two rows of symmetric rollers on a sphered outer raceway, 25×52×18 mm to ISO 15, with one-piece machined brass cage (EM high-capacity design). Reading the full code: the number gives the 25×52 mm envelope, EM names the cage/capacity execution, no bore suffix means cylindrical bore for a direct shaft seat, and W33 annular lubrication groove with outer-ring holes completes the order number. The bearing accepts predominantly radial load with a moderate axial share, but is not a pure thrust bearing: sustained axial-only load skids the unloaded row and damages the EM machined-brass-cage cage. The 13.5 mm section height hosts the spherical roller geometry; shaft and housing fillet radii must clear the chamfer table so the 18 mm-wide ring seats fully on both sides. Never mount 22205EMW33 by striking the outer ring through the roller set; drive through ring faces (or the adapter sleeve nut) and support the ring square to avoid brinelling the 52 mm race.
Typical equipment & failure modes
Common applications
- small agricultural and forestry machinery
- medium fan and blower shafts with belt pull
- small reducer and gearbox output shafts
- construction-mixer and small crusher shafts
Known failure patterns
- lubricant starvation at the centre rib area when the D1/W33 groove is not connected to a relubrication supply
- machined EM cage wear from inadequate oil film at the cage-guiding surfaces
- roller-end smearing during skidding starts under light load and high viscosity grease
- false brinelling on stopped machines exposed to screen or crusher vibration
- fretting corrosion between adapter sleeve and tapered bore when the drive-up is insufficient
Selection pitfalls — read before you substitute
- At 25 mm bore the two-row set is sensitive to over-greasing: pack only the calculated volume around the W33 feature or churning heat cancels the 10,400 r/min speed rating.
- Minimum load must be maintained even at rest under vibration: an unloaded 22205EMW33 on a stopped screen false-brinells; parking brakes and shaker isolation both matter.
- Adapter-sleeve mounting requires the correct sleeve series and locknut for the 25 mm shaft; a sleeve sized to bore alone ignores thread, width and the oil-injection option on large K seats.
- Do not confuse EA and EM at the same number: 22205EMW33 carries EM machined-brass-cage; swapping to the other cage execution changes mass, speed behaviour and sometimes suitability for vibration, even though the 25×52 mm envelope is identical.
- Never substitute 22205EMW33 by envelope alone: the 46.1 kN C0 and 3.23 kN Pu are specific to the NTN EM machined-brass-cage execution, and vibrating duty depends heavily on cage identity.
- The 57.3/46.1 kN ratings, 3.23 kN Pu and 174 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 22205EMW33 (EM machined-brass-cage/W33); another maker's same-envelope part revises internal geometry, so re-verify ratings and cage before substitution on vibrating or rated drives.
Frequently asked questions
What are the dimensions and catalogue data of 22205EMW33?
22205EMW33 is an NTN double-row spherical roller bearing to ISO 15: 25 mm bore, 52 mm OD and 18 mm width (0.984 × 2.047 × 0.709 in). From NTN Ball and Roller Bearings CAT.No.2203E: C 57.3 kN, C0 46.1 kN, Pu 3.23 kN, grease limiting speed 10,400 r/min, oil 13,000 r/min, mass about 174 g. It is open, with one-piece machined brass cage (EM high-capacity design).
What is the difference between the K/K30 tapered bore and the cylindrical bore versions?
22205EMW33 has a cylindrical bore and mounts directly on a machined shaft seat. Its tapered-bore counterpart is 22205EMKW33 (K = 1:12, or K30 = 1:30 on the wide series), intended for adapter/withdrawal-sleeve mounting.
What do EA and EM mean on NTN spherical roller bearings?
EA is the NTN standard-capacity/high-capacity execution with a pressed sheet-steel window cage; EM is the high-capacity execution with a one-piece machined brass cage. Both use the optimised symmetric-roller design, but cage identity changes mass, speed behaviour and suitability for duties like vibrating screens, so they are separate order numbers. 22205EMW33 is the EM machined-brass-cage execution, listed with the ＊ ULTAGE new-generation mark.
What do D1 and W33 mean on 22205EMW33?
W33 denotes the annular lubrication groove with holes in the outer ring: the housing grease port feeds the groove and both roller rows directly. On NTN executions the same feature is spelled D1 in the NTN suffix language; 22205EMW33 carries W33.
How much misalignment and axial load can 22205EMW33 take?
The sphered outer raceway compensates static and dynamic misalignment in the order of 1–2° (verify the exact 2203E figure for the 22200 series); beyond that, load concentrates on one roller row. Load is predominantly radial with a moderate axial share in either direction — 57.3 kN C / 46.1 kN C0 — but sustained pure axial load is not recommended because it unloads one row.
Reviewed & verified by the MPN Base engineering desk against source catalog NTN Ball and Roller Bearings CAT.No.2203E on 2026-10-01. Read our editorial & correction policy.