2205-EKTN9 bearing: complete specifications & equivalents
The 2205-EKTN9 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 | SKF |
| 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 | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 16.8 kN |
| Basic static load rating C0 | 4.4 kN |
| Fatigue load limit Pu | 0.23 kN |
| Reference speed (thermal) | 26000 rpm |
| Limiting speed (mechanical) | 18000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 160 g |
| Manufacturer designation | 2205 EKTN9 |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-27 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-27
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & 2200-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 2200-series | 10 mm |
| Largest outer diameter in 2200-series | 200 mm |
| Width range across 2200-series | 14–53 mm |
| Bore position in 2200-series (smallest first) | 6 of 23 |
| Bore above smallest 2200-series size | 15 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 2205 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 25×52×18 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 2205-E-2RS1TN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 25×52×18 mm envelope, but catalogue C/C0 differ between executions (16.8/4.4 kN vs 14.3/4 kN) — boundary dimensions match, not a load-rating equivalent. |
| 2205-E-2RS1KTN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 25×52×18 mm envelope, but catalogue C/C0 differ between executions (16.8/4.4 kN vs 14.3/4 kN) — boundary dimensions match, not a load-rating equivalent. |
| 2205-ETN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 25×52×18 mm envelope with catalogue ratings within 10 %; 2205 ETN9 is the glass-fibre PA66 cage, open arrangement execution of this size — boundary dimensions interchangeable, only the seal/cage/bore execution differs. |
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 2205-EKTN9 model number is decoded
The 22xx series is the wide light-section self-aligning ball bearing (ISO dimension series 22). the last two digits encode the bore: 2205 carries code 05 = 25 mm (code × 5). Envelope 25×52×18 mm (0.984×2.047×0.709 in) with a 13.5 mm radial section height, C 16.8 kN, C0 4.4 kN and Pu 0.23 kN. The open 2205 EKTN9 carries no shields or seals and relies on application lubrication and external sealing. The EKTN9 suffix identifies the glass-fibre-reinforced polyamide 66 cage execution. The K suffix marks a 1:12 tapered bore for direct mounting on a tapered shaft or with an adapter sleeve. Reference (thermal) speed 26000 r/min, limiting speed 18000 r/min, catalogue mass 160 g.
Typical equipment & failure modes
Common applications
- woodworking machine spindles
- light gearbox layshafts
- food-processing conveyors
- small electric motors
Known failure patterns
- contamination wear when the open arrangement is used without adequate external sealing
- lubricant starvation where no regreasing interval is maintained
- adapter-sleeve fretting when the sleeve is not locked against the shaft shoulder
- incorrect sleeve tightening that leaves the tapered bore loose or over-expanded, changing internal clearance
- excessive misalignment loading one ball row heavily and spalling it early
- rolling-contact fatigue spalling once the catalogue L10 life is exceeded
Selection pitfalls — read before you substitute
- The fatigue load limit is 0.23 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- Self-aligning ball bearings tolerate up to roughly 2–3° of static misalignment, but the sealed 2205-EKTN9 (2RS1) allows less — the lip seal binds before the spherical raceway does.
- On a sleeve-mounted 2205-EKTN9, lock the sleeve against the shaft shoulder; a loose sleeve creeps and frets both the shaft and the bore.
- The EKTN9 suffix on 2205-EKTN9 denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 18000 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- Self-aligning ball bearings tolerate up to roughly 2–3° of static misalignment, but the sealed 2205-EKTN9 (2RS1) allows less — the lip seal binds before the spherical raceway does.
- Assign interference to the rotating ring: on a 25 mm rotating shaft use a k5 seat with an H7 housing; reverse the logic if the outer ring rotates.
Frequently asked questions
What are the dimensions of 2205-EKTN9?
SKF 2205 EKTN9 measures 25 mm bore × 52 mm OD × 18 mm width (0.984 × 2.047 × 0.709 in), mass about 160 g. It is open, with no shields or seals.
How does the bore code in 2205 work?
The final two digits of 2205 are bore code 05, multiplied by 5 to give 25 mm.
What is the speed rating of 2205-EKTN9?
SKF lists a 26000 r/min thermal reference speed and a 18000 r/min mechanical limiting speed for 2205 EKTN9; real limits also depend on lubrication and fits.
How much misalignment can 2205-EKTN9 tolerate?
Self-aligning ball bearings tolerate roughly 2–3° of static misalignment for open executions; sealed 2RS1 variants like 2205-EKTN9 allow less (about 1°) because the seal lip binds first.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-27. Read our editorial & correction policy.