22205EMKW33 bearing: complete specifications & equivalents
The 22205EMKW33 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 | 171 g |
| Manufacturer designation | NTN 22205EMKW33 |
| 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 |
|---|---|---|---|
| 22205EMW33 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same NTN 22200-series envelope, cage and ratings; this is the tapered-bore execution (K, 1:12) of the cylindrical-bore 22205EMW33 — mounting (adapter/withdrawal sleeve or tapered seat, drive-up) differs. 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 22205EMKW33 model number is decoded
For heavy radial load with misalignment on a 25 mm shaft, NTN supplies 22205EMKW33: sphered outer raceway, two roller rows, one-piece machined brass cage (EM high-capacity design), oil speed 13,000 r/min. The leading digits are the ISO 15 dimension series (22200 series); the bore code resolves to 25 mm (two-digit code ×5, with the 00–03 exception table), and 52 mm OD / 18 mm width follow the general plan. Open by design, 22205EMKW33 requires application seals and a grease or oil system; NTN vibrating-duty executions of this envelope are selected with cage and clearance choices that are separate order codes. 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. Check the self-aligning movement after fitting: the housing should pivot freely around the sphered outer raceway; a pinched outer ring removes the alignment capacity the bearing was selected for.
Typical equipment & failure modes
Common applications
- textile and paper converting rolls
- small vibrating-screen and shaker shafts
- light conveyor pulleys and drum shafts
- small agricultural and forestry machinery
Known failure patterns
- lubricant starvation at the centre rib area when the D1/W33 groove is not connected to a relubrication supply
- cage damage when a mounting force is applied through the roller set instead of the ring face
- roller-end smearing during skidding starts under light load and high viscosity grease
- fretting corrosion between adapter sleeve and tapered bore when the drive-up is insufficient
- water-induced pitting in washdown or outdoor duty without effective external seals
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.
- 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.
- Never substitute 22205EMKW33 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 two roller rows must share load equally — a tilted spacer or unequal abutment on the 18 mm-wide ring loads one row only and shows as asymmetric race polish during inspection.
- Self-aligning does not mean unlimited misalignment: beyond the catalogue angle the outer ring's spherical travel is exhausted and the 57.3 kN rating no longer applies.
- The 57.3/46.1 kN ratings, 3.23 kN Pu and 171 g mass are NTN Ball and Roller Bearings CAT.No.2203E values for 22205EMKW33 (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 22205EMKW33?
22205EMKW33 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 171 g. It is open, with one-piece machined brass cage (EM high-capacity design) and a 1:12 tapered bore.
What is the difference between the K/K30 tapered bore and the cylindrical bore versions?
K denotes a 1:12 tapered bore. 22205EMKW33 mounts on an adapter sleeve (or tapered shaft seat) and is driven up to the specified residual clearance; its cylindrical-bore counterpart in the same envelope and ratings is 22205EMW33.
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. 22205EMKW33 is the EM machined-brass-cage execution, listed with the ＊ ULTAGE new-generation mark.
What do D1 and W33 mean on 22205EMKW33?
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; 22205EMKW33 carries W33.
How much misalignment and axial load can 22205EMKW33 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.