PNA15-32 bearing: complete specifications & equivalents
The PNA15-32 is a DIN 616 radial bearing sized 15 x 32 x 16 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 15 mm |
| Outer diameter D | 32 mm |
| Width B | 16 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 12.8 kN |
| Basic static load rating C0 | 17.6 kN |
| Fatigue load limit Pu | 2.12 kN |
| Reference speed (thermal) | 22000 rpm |
| Limiting speed (mechanical) | 24000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 62 g |
| Manufacturer designation | PNA 15/32 |
| Standard | DIN 616 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.6 alignment needle roller bearings, with an inner ring |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.6 alignment needle roller bearings, with 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. 7.6 alignment needle roller bearings, with 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 & PNA-series range
| Bore d | 0.591 in |
|---|---|
| Outer diameter D | 1.26 in |
| Width B | 0.63 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 8.5 mm |
| Smallest bore in PNA-series | 12 mm |
| Largest outer diameter in PNA-series | 62 mm |
| Width range across PNA-series | 12–20 mm |
| Bore position in PNA-series (smallest first) | 2 of 9 |
| Bore above smallest PNA-series size | 3 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the PNA15-32 model number is decoded
PNA 15/32 combines machined-ring needle roller capacity with self-alignment: 15×32×16 mm envelope, convex outer-ring outside running in a correspondingly sphered washer or housing seat. The code PNA 15/32 reads as alignment needle roller bearing, 15 mm inner-ring bore, 16 mm width — the wide section is what absorbs both load and the seat-angle errors the family is designed for. 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. Minimum load matters: below roughly 0.02·C the rollers skid and smear; preloading the pivot or specifying a heavier execution avoids the glazing that pure oscillation produces on these raceways. The sphered seat must be clean and lightly oiled — a scored seat converts the alignment feature into a friction lock, and the needle rollers then take the seat error the family was meant to absorb.
Typical equipment & failure modes
Common applications
- door and gate hinges with heavy radial load
- construction equipment blade and arm pivots
- steering knuckles and kingpin supports with seat angle errors
- pivot bearings where housing bores cannot be kept coaxial
Known failure patterns
- raceway spalling once the catalogue L10 life is exceeded or after overload events
- 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
- false brinelling of standby equipment under external vibration
Selection pitfalls — read before you substitute
- On a 15 mm seat the housing bore quality dominates life: a bore 0.02 mm out of round pinches the 32 mm ring or cup into a lobed shape, and the rollers then trace the housing's geometry error, not the design load.
- Do not interchange envelope-identical needle families blindly: PNA 15/32 shares its 15×32×16 mm outline with inner-ring and sealed siblings whose ratings differ — the family letters are part of the specification, not decoration.
- Reference and limiting speeds are different limits: the 22,000 r/min reference is the thermal criterion under load, The limiting value is mechanical; the reference value is thermal under load, and grease choice moves it substantially.
- The 12.8/17.6 kN ratings and 62 g mass are SKF catalogue values transcribed from ch. 7.6 of PUB BU/P1 17000 (PDF table page 652); combined-type axial ratings appear in the text above because the structured record carries radial values only.
Frequently asked questions
What limits the service life of a PNA 15/32?
Beyond the L10 rating, the practical limits are journal/raceway hardness for the 15 mm seat, lubricant condition at the roller ends, and contamination through open ends — the 8.5 mm radial section leaves no reserve once a raceway is dented or ribboned.
What are the dimensions and ratings of the PNA 15/32?
A PNA 15/32 measures 15 mm bore/Fw × 32 mm outside diameter × 16 mm width (0.591 × 1.26 × 0.63 in). From SKF catalogue PUB BU/P1 17000: radial dynamic rating C 12.8 kN, static C0 17.6 kN, fatigue limit Pu 2.12 kN, limiting speed 24,000 r/min, reference speed 22,000 r/min, mass about 62 g.
How is the PNA 15/32 designation read?
PNA marks the self-aligning needle roller family (inner-ring with machined rings): figures give the 15 mm seat and 16 mm width; the convex outer-ring outside surface aligns within roughly ±2° in its sphered seat.
Can the PNA 15/32 run on an unhardened 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 15 mm k5 seat. Both add the sphered outer ring for seat misalignment.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.6 alignment needle roller bearings, with an inner ring on 2026-09-26. Read our editorial & correction policy.