K47X52X17 bearing: complete specifications & equivalents
The K47X52X17 is a DIN 5402 radial bearing sized 47 x 52 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 | 47 mm |
| Outer diameter D | 52 mm |
| Width B | 17 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 22.4 kN |
| Basic static load rating C0 | 49 kN |
| Fatigue load limit Pu | 6 kN |
| Reference speed (thermal) | 9000 rpm |
| Limiting speed (mechanical) | 10000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 35 g |
| Manufacturer designation | K 47x52x17 |
| Standard | DIN 5402 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.1 needle roller and cage assemblies |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.1 needle roller and cage assemblies) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.1 needle roller and cage assemblies); 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 & K-series range
| Bore d | 1.85 in |
|---|---|
| Outer diameter D | 2.047 in |
| Width B | 0.669 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 2.5 mm |
| Smallest bore in K-series | 3 mm |
| Largest outer diameter in K-series | 63 mm |
| Width range across K-series | 7–32 mm |
| Bore position in K-series (smallest first) | 20 of 22 |
| Bore above smallest K-series size | 44 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the K47X52X17 model number is decoded
In SKF catalogue PUB BU/P1 17000 ch. 7.1, K 47x52x17 appears as a needle roller and cage assembly with complement diameter E 52 mm and width 17 mm — a self-contained roller set that turns a 47 mm shaft and its housing into a complete bearing. The designation numbers of K 47x52x17 state the three machine-seat dimensions — 47 mm journal, 52 mm bore-side complement diameter, 17 mm width — which is why ordering errors here show up as a sloppy or seized fit, not as a returned box. SKF supplies these assemblies in single rows as tabulated; the cage quality determines the speed ceiling, and the catalogued 10,000 r/min limiting speed assumes a precision ground journal and bore. Catalogue mass 35 g at 47×52×17 mm makes this one of the highest capacity-per-gram choices in the needle roller and cage assemblies; the limit is usually the shaft's ability to serve as a raceway, not the rolling contact itself. The assembly is drawn on over a mounting sleeve that spreads the load around all rollers; never drive it home against the cage face, and retain it with a washer whose OD spans the cage, not the rollers.
Typical equipment & failure modes
Common applications
- planetary gear pins in compact transmissions
- connecting rods of small compressors where radial height is critical
- rocker arm and rocker pin pivots on camshafts
- pump and gearbox idler gears running on hardened pins
Known failure patterns
- raceway spalling once the catalogue L10 life is exceeded or after overload events
- polymer cage deformation when the local temperature exceeds the 120 °C sustained limit
- grease starvation at the roller ends when relubrication intervals are stretched in dirty duty
- brinelling of raceways from impact or pressing force transmitted through the rolling elements
- smearing of rollers and journal during idle periods because the radial section holds too little lubricant
Selection pitfalls — read before you substitute
- At 47 mm bore, verify shaft deflection against the needle length: these rollers tolerate little edge loading, and a simply supported span between 47 mm seats can bend past the compensation range long before the load rating is exhausted.
- Hardness is load capacity: in families without an inner ring the 47 mm journal must hold 58–64 HRC with a ground finish; a surface that looks fine but sits at 45 HRC will rib the raceway within weeks.
- The quoted 22.4/49 kN ratings are SKF catalogue values for this exact execution (K 47x52x17); ratings can be revised without the order number changing, so keep the catalogue version (SKF catalogue PUB BU/P1 17000) with the drawing.
- The 22.4/49 kN ratings and 35 g mass are SKF catalogue values transcribed from ch. 7.1 of PUB BU/P1 17000 (PDF table page 618); 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 K 47x52x17?
Beyond the L10 rating, the practical limits are journal/raceway hardness for the 47 mm seat, lubricant condition at the roller ends, and contamination through open ends — the 2.5 mm radial section leaves no reserve once a raceway is dented or ribboned.
What are the dimensions and ratings of the K 47x52x17?
A K 47x52x17 measures 47 mm bore/Fw × 52 mm outside diameter × 17 mm width (1.85 × 2.047 × 0.669 in). From SKF catalogue PUB BU/P1 17000: radial dynamic rating C 22.4 kN, static C0 49 kN, fatigue limit Pu 6 kN, limiting speed 10,000 r/min, reference speed 9,000 r/min, mass about 35 g.
How is the K 47x52x17 designation read?
K = needle roller and cage assembly (DIN 5402); the three figures give Fw 47 mm (shaft journal), E 52 mm (complement outside diameter, matched by the housing bore) and B 17 mm width. TN marks the glass fibre reinforced PA66 cage.
Can the K 47x52x17 run on an unhardened shaft?
No. In this execution the 47 mm shaft journal is the inner raceway: it must be ground and hardened to 58–64 HRC (with matching housing bore quality on the outside). If the shaft cannot meet that, order the inner-ring sibling (NKI/NA execution) plus its ground inner ring instead.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.1 needle roller and cage assemblies on 2026-09-26. Read our editorial & correction policy.