E-2RS1KTN9-H bearing: complete specifications & equivalents
The E-2RS1KTN9-H is a ISO 15 radial bearing sized 52 x 18 x 31 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 | 52 mm |
| Outer diameter D | 18 mm |
| Width B | 31 mm |
| Material | GCr15 |
| Seal / shield | 2RS |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Operating temperature | -40 to +120 °C |
| Mass | 2205000 g |
| Manufacturer designation | E-2RS1KTN9 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 | 1.22 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 E-2RS1KTN9-H model number is decoded
The Exx series is a self-aligning ball bearing family. the final digit of E is the bore in millimetres: E-2RS1KTN9 H fits a 52 mm shaft (direct miniature spelling). Envelope 52×18×31 mm (2.047×0.709×1.22 in) with a -17.0 mm radial section height, C undefined kN, C0 undefined kN and Pu undefined kN. SKF spells the sealed execution E-2RS1KTN9 H (suffix 2RS1): two contact elastomer lips over a lifetime grease fill; the lips add drag, and no thermal reference speed is published. 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 E 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
- textile machinery drives
- industrial fans and blowers
- woodworking machinery
- pump shafts with mild misalignment
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
- raceway smearing under marginal lubrication at start-up
- electrical pitting in VFD-driven motors without shaft grounding
Selection pitfalls — read before you substitute
- Catalogue ratings for E-2RS1KTN9-H (C undefined kN, C0 undefined 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 spherical outer raceway lets E-2RS1KTN9-H tolerate shaft deflection, but it does not increase thrust capacity — combined loads still need an angular-contact or deep-groove bearing.
- The 2RS1 contact seals on E-2RS1KTN9-H add drag and cap speed at undefined r/min; no thermal reference speed is published because seal and grease life govern, not the bearing steel.
- Tighten the adapter sleeve to the SKF-recommended starting clearance, not to feel — an over-tightened sleeve expands the inner ring and removes all internal clearance.
- The suffix on E-2RS1KTN9-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.
- Mount E-2RS1KTN9-H by heating the inner ring (max 120 °C) on a cylindrical bore — driving it home through the outer ring or balls brinells the raceways.
Frequently asked questions
What are the dimensions of E-2RS1KTN9-H?
SKF E-2RS1KTN9 H measures 52 mm bore × 18 mm OD × 31 mm width (2.047 × 0.709 × 1.22 in), mass about 2205000 g. It has two contact rubber seals (2RS1) and a lifetime grease fill.
How do I read the E designation?
Miniature self-aligning bearings print the bore as the final digit, so E is a 52 mm bearing; the leading digits give the section family.
Can E-2RS1KTN9-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.
Which fits should I use for E-2RS1KTN9-H?
With a rotating inner ring use roughly k5 on the shaft and H7 in the 18 mm housing; reverse the interference if the outer ring rotates.
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.