RPNA45-62 bearing: complete specifications & equivalents
The RPNA45-62 is a DIN 616 radial bearing sized 45 x 62 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 | 45 mm |
| Outer diameter D | 62 mm |
| Width B | 20 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 27.5 kN |
| Basic static load rating C0 | 57 kN |
| Fatigue load limit Pu | 7.1 kN |
| Reference speed (thermal) | 9000 rpm |
| Limiting speed (mechanical) | 10000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 180 g |
| Manufacturer designation | RPNA 45/62 |
| Standard | DIN 616 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.5 alignment needle roller bearings, without an inner ring |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.5 alignment needle roller bearings, without an inner ring) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.5 alignment needle roller bearings, without an inner ring); 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 & RPNA-series range
| Bore d | 1.772 in |
|---|---|
| Outer diameter D | 2.441 in |
| Width B | 0.787 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 8.5 mm |
| Smallest bore in RPNA-series | 15 mm |
| Largest outer diameter in RPNA-series | 62 mm |
| Width range across RPNA-series | 12–20 mm |
| Bore position in RPNA-series (smallest first) | 8 of 8 |
| Bore above smallest RPNA-series size | 30 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the RPNA45-62 model number is decoded
Where a plain needle roller bearing would edge-load on a bent frame, RPNA 45/62 from the self-aligning needle roller bearings without inner ring aligns itself: 45 mm bore, 62 mm sphered outside diameter, 20 mm width. Reading the designation: RPNA marks the self-aligning execution ( inner ring), the numbers giving 45 mm bore and 20 mm width; the sphered outside diameter 62 mm follows the series plan. These are heavy-section machined rings, not drawn cups: the sphered outside surface is ground, the flanges retain the rollers, and the PNA execution adds the ground inner ring for unhardened shafts. Catalogue mass 180 g at 45×62×20 mm makes this one of the highest capacity-per-gram choices in the self-aligning needle roller bearings without inner ring; the limit is usually the shaft's ability to serve as a raceway, not the rolling contact itself. Mounting: seat the convex outer ring surface in its sphered counterpart dry first, confirm the 45 mm raceway rotates freely through the full alignment range, then lubricate and assemble for service.
Typical equipment & failure modes
Common applications
- construction equipment blade and arm pivots
- steering knuckles and kingpin supports with seat angle errors
- pivot bearings where housing bores cannot be kept coaxial
- linkage eyes and clevis mounts on frames that flex
Known failure patterns
- needle edge loading and raceway denting when the shaft deflects beyond the compensation range
- cage pocket wear and roller skew after sustained operation with too little radial preload
- abrasive paste formation from dust ingressing past open ends without effective housing seals
- rolling-contact fatigue spalling after the rated L10 life
Selection pitfalls — read before you substitute
- At 45 mm bore, verify shaft deflection against the needle length: these rollers tolerate little edge loading, and a simply supported span between 45 mm seats can bend past the compensation range long before the load rating is exhausted.
- The quoted 27.5/57 kN ratings are SKF catalogue values for this exact execution (RPNA 45/62); ratings can be revised without the order number changing, so keep the catalogue version (SKF catalogue PUB BU/P1 17000) with the drawing.
- Oscillating pivots fail differently: rocking through a small angle concentrates wear in the same roller positions — inspect those zones, and consider rotating the assembly's clock position at service intervals.
- The 27.5/57 kN ratings and 180 g mass are SKF catalogue values transcribed from ch. 7.5 of PUB BU/P1 17000 (PDF table page 650); combined-type axial ratings appear in the text above because the structured record carries radial values only.
Frequently asked questions
What does RPNA 45/62 mean in SKF part numbering?
RPNA marks the self-aligning needle roller family (with machined rings): figures give the 45 mm seat and 20 mm width; the convex outer-ring outside surface aligns within roughly ±2° in its sphered seat.
Does the RPNA 45/62 need a hardened and ground shaft?
Depends on the family member: RPNA runs directly on the shaft (hardened, 58–64 HRC, ground), while PNA includes a ground inner ring for an ordinary 45 mm k5 seat. Both add the sphered outer ring for seat misalignment.
What mounting mistakes ruin a RPNA 45/62?
Press on the ring faces only with a fitting sleeve, keep everything square to the 45 mm seat, and never transmit force through the rolling elements. Follow the catalogue's seat tolerances — the narrow needle contact forgives neither tilt nor burrs.
Is the RPNA 45/62 sealed?
No — this execution is open and depends on the housing sealing arrangement; grease it at assembly and keep the relubrication interval short in dirty duty.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.5 alignment needle roller bearings, without an inner ring on 2026-09-26. Read our editorial & correction policy.