11205-ETN9 bearing: complete specifications & equivalents
The 11205-ETN9 is a ISO 15 radial bearing sized 25 x 52 x 15 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 | 15 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 14.3 kN |
| Basic static load rating C0 | 4 kN |
| Fatigue load limit Pu | 0.21 kN |
| Limiting speed (mechanical) | 8000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 220 g |
| Manufacturer designation | 11205 ETN9 |
| 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 & 11200-series range
| Bore d | 0.984 in |
|---|---|
| Outer diameter D | 2.047 in |
| Width B | 0.591 in |
| ISO bore code | 05 |
| Radial section height (D−d)/2 | 13.5 mm |
| Smallest bore in 11200-series | 20 mm |
| Largest outer diameter in 11200-series | 110 mm |
| Width range across 11200-series | 14–22 mm |
| Bore position in 11200-series (smallest first) | 2 of 8 |
| Bore above smallest 11200-series size | 5 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 1205-ETN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 25×52×15 mm envelope with catalogue ratings within 10 %; 1205 ETN9 is the glass-fibre PA66 cage, open arrangement execution of this size — boundary dimensions interchangeable, only the seal/cage/bore execution differs. |
| 1205-EKTN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 25×52×15 mm envelope with catalogue ratings within 10 %; 1205 EKTN9 is the glass-fibre PA66 cage, open arrangement, tapered bore 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 11205-ETN9 model number is decoded
The 112xx series is SKF's extended-inner-ring self-aligning ball bearing: the inner ring is wider than the outer, giving a longer shaft seat for locating-bearing duty. the last two digits encode the bore: 11205 carries code 05 = 25 mm (code × 5). Envelope 25×52×15 mm (0.984×2.047×0.591 in) with a 13.5 mm radial section height, C 14.3 kN, C0 4 kN and Pu 0.21 kN. The open 11205 ETN9 carries no shields or seals and relies on application lubrication and external sealing. The ETN9 suffix identifies the glass-fibre-reinforced polyamide 66 cage execution. The bore is cylindrical (straight), for a press-fit on a 25 mm shaft. Limiting speed 8000 r/min, catalogue mass 220 g.
Typical equipment & failure modes
Common applications
- shafts with a single locating bearing against a shoulder
- agricultural machinery driven shafts
- fan shafts with thermal expansion take-up
- woodworking machine cutter shafts
Known failure patterns
- lubricant starvation where no regreasing interval is maintained
- contamination wear when the open arrangement is used without adequate external sealing
- uneven loading of the two ball rows if the extended ring is not seated square on the shaft
- the extended inner ring acting as a thrust collar: never use it to carry axial load — locate with a shaft shoulder or locknut instead
- rolling-contact fatigue spalling once the catalogue L10 life is exceeded
- brinelling from static overload or hammer blows during mounting
Selection pitfalls — read before you substitute
- At 25 mm bore, C3 clearance is the safe choice when interference fits plus temperature rise consume the CN clearance; a hot tight bearing with no residual clearance fails fast.
- Mount 11205-ETN9 by heating the inner ring (max 120 °C) on a cylindrical bore — driving it home through the outer ring or balls brinells the raceways.
- The extended inner ring is not a thrust collar — it cannot carry axial load; use a locknut or shaft shoulder for thrust location.
- The ETN9 suffix on 11205-ETN9 denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 8000 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- Mount 11205-ETN9 by heating the inner ring (max 120 °C) on a cylindrical bore — driving it home through the outer ring or balls brinells the raceways.
- The fatigue load limit is 0.21 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
Frequently asked questions
What are the dimensions of 11205-ETN9?
SKF 11205 ETN9 measures 25 mm bore × 52 mm OD × 15 mm width (0.984 × 2.047 × 0.591 in), mass about 220 g. It is open, with no shields or seals.
How does the bore code in 11205 work?
The final two digits of 11205 are bore code 05, multiplied by 5 to give 25 mm.
What load can 11205-ETN9 take?
Catalogue values for 11205 ETN9: dynamic C 14.3 kN, static C0 4 kN, fatigue limit Pu 0.21 kN. Use C in life calculation and C0 for static checks at 25 mm bore.
What is the speed rating of 11205-ETN9?
SKF publishes only the 8000 r/min limiting speed for this execution; sealed variants have no thermal reference speed because seal and grease life govern.
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.