1207-EKTN9 bearing: complete specifications & equivalents
The 1207-EKTN9 is a ISO 15 radial bearing sized 35 x 72 x 17 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 35 mm |
| Outer diameter D | 72 mm |
| Width B | 17 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 19 kN |
| Basic static load rating C0 | 6 kN |
| Fatigue load limit Pu | 0.31 kN |
| Reference speed (thermal) | 20000 rpm |
| Limiting speed (mechanical) | 13000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 320 g |
| Manufacturer designation | 1207 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 & 1200-series range
| Bore d | 1.378 in |
|---|---|
| Outer diameter D | 2.835 in |
| Width B | 0.669 in |
| ISO bore code | 07 |
| Radial section height (D−d)/2 | 18.5 mm |
| Smallest bore in 1200-series | 6 mm |
| Largest outer diameter in 1200-series | 230 mm |
| Width range across 1200-series | 6–154 mm |
| Bore position in 1200-series (smallest first) | 12 of 32 |
| Bore above smallest 1200-series size | 29 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 1207 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 35×72×17 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 1207-ETN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 35×72×17 mm envelope with catalogue ratings within 10 %; 1207 ETN9 is the glass-fibre PA66 cage, open arrangement execution of this size — boundary dimensions interchangeable, only the seal/cage/bore execution differs. |
| 11207-TN9 | SKF | full Dimensions and internal design equivalent — standard interchange. | Same 35×72×17 mm envelope with catalogue ratings within 10 %; 11207 TN9 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 1207-EKTN9 model number is decoded
The 12xx series is the light/normal-section self-aligning ball bearing (ISO dimension series 02). the last two digits encode the bore: 1207 carries code 07 = 35 mm (code × 5). Envelope 35×72×17 mm (1.378×2.835×0.669 in) with a 18.5 mm radial section height, C 19 kN, C0 6 kN and Pu 0.31 kN. The open 1207 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 20000 r/min, limiting speed 13000 r/min, catalogue mass 320 g.
Typical equipment & failure modes
Common applications
- industrial fans and blowers
- woodworking machinery
- pump shafts with mild misalignment
- material-handling equipment
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
- cage damage from running beyond the limiting speed
- raceway smearing under marginal lubrication at start-up
Selection pitfalls — read before you substitute
- Assign interference to the rotating ring: on a 35 mm rotating shaft use a k5 seat with an H7 housing; reverse the logic if the outer ring rotates.
- Fillet radii must clear the 1207-EKTN9 chamfer so the 17 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- On a sleeve-mounted 1207-EKTN9, lock the sleeve against the shaft shoulder; a loose sleeve creeps and frets both the shaft and the bore.
- The EKTN9 suffix on 1207-EKTN9 denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the 13000 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- Fillet radii must clear the 1207-EKTN9 chamfer so the 17 mm-wide ring seats square; an oversized shaft radius creates point contact on the ring face.
- Self-aligning ball bearings tolerate up to roughly 2–3° of static misalignment, but the sealed 1207-EKTN9 (2RS1) allows less — the lip seal binds before the spherical raceway does.
Frequently asked questions
What are the dimensions of 1207-EKTN9?
SKF 1207 EKTN9 measures 35 mm bore × 72 mm OD × 17 mm width (1.378 × 2.835 × 0.669 in), mass about 320 g. It is open, with no shields or seals.
How does the bore code in 1207 work?
The final two digits of 1207 are bore code 07, multiplied by 5 to give 35 mm.
Which fits should I use for 1207-EKTN9?
With a rotating inner ring use roughly k5 on the shaft and H7 in the 72 mm housing; reverse the interference if the outer ring rotates.
How heavy is 1207-EKTN9?
Catalogue mass is 320 g for 1207 EKTN9; seal and cage executions of the same envelope differ by a few grams.
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.