2208-E-2RS1KTN9 bearing: complete specifications & equivalents
The 2208-E-2RS1KTN9 is a ISO 15 radial bearing sized 40 x 80 x 23 mm (bore x OD x width) with 2RS sealing. 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 | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 19.9 kN |
| Basic static load rating C0 | 6.95 kN |
| Fatigue load limit Pu | 0.36 kN |
| Limiting speed (mechanical) | 5600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 500 g |
| Manufacturer designation | 2208 E-2RS1KTN9 |
| 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; seal variant (2RS vs OPEN) and load ratings differ — confirm sealing and rating before substituting. |
| 2208-E-2RS1TN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 40×80×23 mm envelope with catalogue ratings within 10 %; 2208 E-2RS1TN9 is the glass-fibre PA66 cage, two contact elastomer seals execution of this size — boundary dimensions interchangeable, only the seal/cage/bore execution differs. |
| 2208-ETN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×80×23 mm envelope, but catalogue C/C0 differ between executions (19.9/6.95 kN vs 31.9/10 kN) — boundary dimensions match, not a load-rating equivalent. |
| 2208-EKTN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 40×80×23 mm envelope, but catalogue C/C0 differ between executions (19.9/6.95 kN vs 31.9/10 kN) — boundary dimensions match, not a load-rating equivalent. |
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-E-2RS1KTN9 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 19.9 kN, C0 6.95 kN and Pu 0.36 kN. SKF spells the sealed execution 2208 E-2RS1KTN9 (suffix 2RS1): two contact elastomer lips over a lifetime grease fill; the lips add drag, and no thermal reference speed is published. The E-2RS1KTN9 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. Limiting speed 5600 r/min, catalogue mass 500 g.
Typical equipment & failure modes
Common applications
- conveyor drum and pulley shafts
- agricultural gearboxes
- textile machinery drives
- industrial fans and blowers
Known failure patterns
- grease loss when the sealed-for-life cavity is overheated with no relubrication path
- contact-seal lip hardening and grease-life expiry after long high-temperature service
- 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
- brinelling from static overload or hammer blows during mounting
- false brinelling from vibration while the shaft stands idle
Selection pitfalls — read before you substitute
- The spherical outer raceway lets 2208-E-2RS1KTN9 tolerate shaft deflection, but it does not increase thrust capacity — combined loads still need an angular-contact or deep-groove bearing.
- The fatigue load limit is 0.36 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- Do not wash 2208-E-2RS1KTN9 with solvent — the lifetime grease fill is sealed in, and solvent destroys the grease without a way to repack it.
- On a sleeve-mounted 2208-E-2RS1KTN9, lock the sleeve against the shaft shoulder; a loose sleeve creeps and frets both the shaft and the bore.
- The E-2RS1KTN9 suffix on 2208-E-2RS1KTN9 denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 5600 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- At 40 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.
Frequently asked questions
What are the dimensions of 2208-E-2RS1KTN9?
SKF 2208 E-2RS1KTN9 measures 40 mm bore × 80 mm OD × 23 mm width (1.575 × 3.15 × 0.906 in), mass about 500 g. It has two contact rubber seals (2RS1) and a lifetime grease fill.
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.
What is the speed rating of 2208-E-2RS1KTN9?
SKF publishes only the 5600 r/min limiting speed for this execution; sealed variants have no thermal reference speed because seal and grease life govern.
How much misalignment can 2208-E-2RS1KTN9 tolerate?
Self-aligning ball bearings tolerate roughly 2–3° of static misalignment for open executions; sealed 2RS1 variants like 2208-E-2RS1KTN9 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.