2208-EKTN9 bearing: complete specifications & equivalents
The 2208-EKTN9 is a ISO 15 radial bearing sized 40 x 80 x 23 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 40 mm |
| Outer diameter D | 80 mm |
| Width B | 23 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 31.9 kN |
| Basic static load rating C0 | 10 kN |
| Fatigue load limit Pu | 0.51 kN |
| Reference speed (thermal) | 16000 rpm |
| Limiting speed (mechanical) | 11000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 510 g |
| Manufacturer designation | 2208 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 | 1.575 in |
|---|---|
| Outer diameter D | 3.15 in |
| Width B | 0.906 in |
| ISO bore code | 08 |
| Radial section height (D−d)/2 | 20 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) | 9 of 23 |
| Bore above smallest 2200-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 2208 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×80×23 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 2208-E-2RS1TN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×80×23 mm envelope, but catalogue C/C0 differ between executions (31.9/10 kN vs 19.9/6.95 kN) — boundary dimensions match, not a load-rating equivalent. |
| 2208-E-2RS1KTN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×80×23 mm envelope, but catalogue C/C0 differ between executions (31.9/10 kN vs 19.9/6.95 kN) — boundary dimensions match, not a load-rating equivalent. |
| 2208-ETN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 40×80×23 mm envelope with catalogue ratings within 10 %; 2208 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 2208-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: 2208 carries code 08 = 40 mm (code × 5). Envelope 40×80×23 mm (1.575×3.15×0.906 in) with a 20.0 mm radial section height, C 31.9 kN, C0 10 kN and Pu 0.51 kN. The open 2208 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 16000 r/min, limiting speed 11000 r/min, catalogue mass 510 g.
Typical equipment & failure modes
Common applications
- pump shafts with mild misalignment
- material-handling equipment
- industrial electric motors
- conveyor drum and pulley shafts
Known failure patterns
- lubricant starvation where no regreasing interval is maintained
- contamination wear when the open arrangement is used without adequate external sealing
- incorrect sleeve tightening that leaves the tapered bore loose or over-expanded, changing internal clearance
- adapter-sleeve fretting when the sleeve is not locked against the shaft shoulder
- electrical pitting in VFD-driven motors without shaft grounding
- excessive misalignment loading one ball row heavily and spalling it early
Selection pitfalls — read before you substitute
- Mount 2208-EKTN9 by heating the inner ring (max 120 °C) on a cylindrical bore — driving it home through the outer ring or balls brinells the raceways.
- Assign interference to the rotating ring: on a 40 mm rotating shaft use a k5 seat with an H7 housing; reverse the logic if the outer ring rotates.
- The K suffix means a 1:12 tapered bore: 2208-EKTN9 is not a drop-in for the straight-bore version — it needs a tapered shaft or an H-series adapter sleeve.
- The EKTN9 suffix on 2208-EKTN9 denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 11000 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- Assign interference to the rotating ring: on a 40 mm rotating shaft use a k5 seat with an H7 housing; reverse the logic if the outer ring rotates.
- Catalogue ratings for 2208-EKTN9 (C 31.9 kN, C0 10 kN) are SKF figures from PUB BU/P1 17000; geometry revisions can change ratings without changing the designation, so keep the catalogue edition with the specification.
Frequently asked questions
What are the dimensions of 2208-EKTN9?
SKF 2208 EKTN9 measures 40 mm bore × 80 mm OD × 23 mm width (1.575 × 3.15 × 0.906 in), mass about 510 g. It is open, with no shields or seals.
How does the bore code in 2208 work?
The final two digits of 2208 are bore code 08, multiplied by 5 to give 40 mm.
How much misalignment can 2208-EKTN9 tolerate?
Self-aligning ball bearings tolerate roughly 2–3° of static misalignment for open executions; sealed 2RS1 variants like 2208-EKTN9 allow less (about 1°) because the seal lip binds first.
Can 2208-EKTN9 take axial load?
A self-aligning ball bearing can carry some axial load in addition to radial load, but its axial capacity is lower than an angular-contact bearing of the same envelope. Use it where misalignment, not thrust, is the main requirement.
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.