2203-ETN9 bearing: complete specifications & equivalents
The 2203-ETN9 is a ISO 15 radial bearing sized 17 x 40 x 16 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 17 mm |
| Outer diameter D | 40 mm |
| Width B | 16 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 10.6 kN |
| Basic static load rating C0 | 2.55 kN |
| Fatigue load limit Pu | 0.14 kN |
| Reference speed (thermal) | 34000 rpm |
| Limiting speed (mechanical) | 24000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 88 g |
| Manufacturer designation | 2203 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 & 2200-series range
| Bore d | 0.669 in |
|---|---|
| Outer diameter D | 1.575 in |
| Width B | 0.63 in |
| ISO bore code | 03 |
| Radial section height (D−d)/2 | 11.5 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) | 4 of 23 |
| Bore above smallest 2200-series size | 7 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 2203 | NTN | full Dimensions and internal design equivalent — standard interchange. | NTN counterpart 2203S on the same 17×40×16 mm envelope with ratings within 10 % — interchange after checking seal, cage and bore details on both pages. |
| 2203-E-2RS1TN9 | SKF | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 17×40×16 mm envelope, but catalogue C/C0 differ between executions (10.6/2.55 kN vs 8.84/2.2 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 2203-ETN9 model number is decoded
The 22xx series is the wide light-section self-aligning ball bearing (ISO dimension series 22). bore code 03 follows the 10/12/15/17 mm exception table, so 2203 fits a 17 mm shaft. Envelope 17×40×16 mm (0.669×1.575×0.63 in) with a 11.5 mm radial section height, C 10.6 kN, C0 2.55 kN and Pu 0.14 kN. The open 2203 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 17 mm shaft. Reference (thermal) speed 34000 r/min, limiting speed 24000 r/min, catalogue mass 88 g.
Typical equipment & failure modes
Common applications
- light gearbox layshafts
- food-processing conveyors
- small electric motors
- conveyor idler rollers
Known failure patterns
- lubricant starvation where no regreasing interval is maintained
- contamination wear when the open arrangement is used without adequate external sealing
- 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 17 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.
- Assign interference to the rotating ring: on a 17 mm rotating shaft use a j5/k5 seat with an H7 housing; reverse the logic if the outer ring rotates.
- The ETN9 suffix on 2203-ETN9 denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 24000 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- The fatigue load limit is 0.14 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- At 17 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.
- The spherical outer raceway lets 2203-ETN9 tolerate shaft deflection, but it does not increase thrust capacity — combined loads still need an angular-contact or deep-groove bearing.
Frequently asked questions
What are the dimensions of 2203-ETN9?
SKF 2203 ETN9 measures 17 mm bore × 40 mm OD × 16 mm width (0.669 × 1.575 × 0.63 in), mass about 88 g. It is open, with no shields or seals.
How does the bore code in 2203 work?
Codes 00–03 follow the exception table (10, 12, 15, 17 mm): 2203 fits a 17 mm shaft. Code × 5 starts at code 04.
How much misalignment can 2203-ETN9 tolerate?
Self-aligning ball bearings tolerate roughly 2–3° of static misalignment for open executions; sealed 2RS1 variants like 2203-ETN9 allow less (about 1°) because the seal lip binds first.
Can 2203-ETN9 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.