11210-TN9 bearing: complete specifications & equivalents
The 11210-TN9 is a ISO 15 radial bearing sized 50 x 90 x 20 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 50 mm |
| Outer diameter D | 90 mm |
| Width B | 20 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 26.5 kN |
| Basic static load rating C0 | 9.15 kN |
| Fatigue load limit Pu | 0.475 kN |
| Limiting speed (mechanical) | 4300 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 850 g |
| Manufacturer designation | 11210 TN9 |
| 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 | 1.969 in |
|---|---|
| Outer diameter D | 3.543 in |
| Width B | 0.787 in |
| ISO bore code | 10 |
| Radial section height (D−d)/2 | 20 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) | 7 of 8 |
| Bore above smallest 11200-series size | 30 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 1210-ETN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 50×90×20 mm envelope with catalogue ratings within 10 %; 1210 ETN9 is the glass-fibre PA66 cage, open arrangement execution of this size — boundary dimensions interchangeable, only the seal/cage/bore execution differs. |
| 1210-EKTN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 50×90×20 mm envelope with catalogue ratings within 10 %; 1210 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 11210-TN9 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: 11210 carries code 10 = 50 mm (code × 5). Envelope 50×90×20 mm (1.969×3.543×0.787 in) with a 20.0 mm radial section height, C 26.5 kN, C0 9.15 kN and Pu 0.475 kN. The open 11210 TN9 carries no shields or seals and relies on application lubrication and external sealing. The TN9 suffix identifies the glass-fibre-reinforced polyamide 66 cage execution. The bore is cylindrical (straight), for a press-fit on a 50 mm shaft. Limiting speed 4300 r/min, catalogue mass 850 g.
Typical equipment & failure modes
Common applications
- woodworking machine cutter shafts
- locating-bearing positions on long shafts
- conveyor pulleys needing a wide inner-ring seat
- shafts with a single locating bearing against a shoulder
Known failure patterns
- contamination wear when the open arrangement is used without adequate external sealing
- lubricant starvation where no regreasing interval is maintained
- the extended inner ring acting as a thrust collar: never use it to carry axial load — locate with a shaft shoulder or locknut instead
- uneven loading of the two ball rows if the extended ring is not seated square on the shaft
- 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 0.475 kN; it feeds the equivalent-mean-load check, not the basic life calculation — do not substitute one for the other.
- Catalogue ratings for 11210-TN9 (C 26.5 kN, C0 9.15 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.
- The 112xx extended inner ring of 11210-TN9 gives a wider shaft seat but the same 50×90×20 mm envelope as a 12xx of the same bore — the outer ring is interchangeable, the inner is not.
- The TN9 suffix on 11210-TN9 denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 4300 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- The spherical outer raceway lets 11210-TN9 tolerate shaft deflection, but it does not increase thrust capacity — combined loads still need an angular-contact or deep-groove bearing.
- Fillet radii must clear the 11210-TN9 chamfer so the 20 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
Frequently asked questions
What are the dimensions of 11210-TN9?
SKF 11210 TN9 measures 50 mm bore × 90 mm OD × 20 mm width (1.969 × 3.543 × 0.787 in), mass about 850 g. It is open, with no shields or seals.
How does the bore code in 11210 work?
The final two digits of 11210 are bore code 10, multiplied by 5 to give 50 mm.
What is the speed rating of 11210-TN9?
SKF publishes only the 4300 r/min limiting speed for this execution; sealed variants have no thermal reference speed because seal and grease life govern.
How much misalignment can 11210-TN9 tolerate?
Self-aligning ball bearings tolerate roughly 2–3° of static misalignment for open executions; sealed 2RS1 variants like 11210-TN9 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.