EKTN9-H bearing: complete specifications & equivalents
The EKTN9-H is a ISO 15 radial bearing sized 52 x 18 x 32 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 52 mm |
| Outer diameter D | 18 mm |
| Width B | 32 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Operating temperature | -40 to +120 °C |
| Mass | 2205000 g |
| Manufacturer designation | EKTN9 H |
| 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 | 2.047 in |
|---|---|
| Outer diameter D | 0.709 in |
| Width B | 1.26 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | -17 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) | 16 of 32 |
| Bore above smallest 1200-series size | 46 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the EKTN9-H model number is decoded
The EKxx series is a self-aligning ball bearing family. the last two digits encode the bore: EKTN9 carries code NaN = 52 mm (code × 5). Envelope 52×18×32 mm (2.047×0.709×1.26 in) with a -17.0 mm radial section height, C undefined kN, C0 undefined kN and Pu undefined kN. The open EKTN9 H carries no shields or seals and relies on application lubrication and external sealing. The suffix identifies the glass-fibre-reinforced polyamide 66 cage execution. The K suffix marks a 1:12 tapered bore, here supplied with the 305 adapter sleeve for mounting on a cylindrical 52 mm shaft. Limiting speed undefined r/min, catalogue mass 2205000 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
- 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 52 mm rotating shaft use a k5 seat with an H7 housing; reverse the logic if the outer ring rotates.
- Assign interference to the rotating ring: on a 52 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: EKTN9-H is not a drop-in for the straight-bore version — it needs a tapered shaft or an 305 adapter sleeve.
- The suffix on EKTN9-H denotes a glass-fibre-reinforced polyamide 66 cage: quiet and light at the undefined r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- At 52 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 EKTN9-H 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 EKTN9-H?
SKF EKTN9 H measures 52 mm bore × 18 mm OD × 32 mm width (2.047 × 0.709 × 1.26 in), mass about 2205000 g. It is open, with no shields or seals.
How does the bore code in EKTN9 work?
The final two digits of EKTN9 are bore code NaN, multiplied by 5 to give 52 mm.
How much misalignment can EKTN9-H tolerate?
Self-aligning ball bearings tolerate roughly 2–3° of static misalignment for open executions; sealed 2RS1 variants like EKTN9-H allow less (about 1°) because the seal lip binds first.
Can EKTN9-H 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.