K12X17X13-TN bearing: complete specifications & equivalents
The K12X17X13-TN is a DIN 5402 radial bearing sized 12 x 17 x 13 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 12 mm |
| Outer diameter D | 17 mm |
| Width B | 13 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 9.13 kN |
| Basic static load rating C0 | 10.4 kN |
| Fatigue load limit Pu | 1.22 kN |
| Reference speed (thermal) | 26000 rpm |
| Limiting speed (mechanical) | 30000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4.9 g |
| Manufacturer designation | K 12x17x13 TN |
| 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 | 0.472 in |
|---|---|
| Outer diameter D | 0.669 in |
| Width B | 0.512 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) | 9 of 22 |
| Bore above smallest K-series size | 9 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the K12X17X13-TN model number is decoded
SKF lists K 12x17x13 TN in the K series of needle roller and cage assemblies: needle rollers caged at 12×17×13 mm, designed to run directly on a ground, hardened shaft and inside a machined housing bore. In the K code K 12x17x13 TN, Fw×E×B reads directly as journal 12 mm, complement diameter 17 mm and cage width 13 mm; the housing bore is ground to E with H6/H7 tolerance to complete the outer raceway. No suffix on the order number means the standard single-row assembly; the polymer TN cage version is the usual choice for grease-lubricated pivots where noise matters. The 4.9 g catalogue mass and 2.5 mm radial section ((17−12)/2) frame a rating of about 0.76 kN dynamic per millimetre of bore — the needle construction's density advantage over ball bearings of the same envelope. Lubrication reaches both raceways through the open cage windows; grease the bore and journal before assembly, since after fitting the 13 mm narrow cage cannot be relubricated through a closed housing.
Typical equipment & failure modes
Common applications
- pump and gearbox idler gears running on hardened pins
- hinge and pivot joints in printing and textile machinery
- universal joint crosses on commercial vehicles
- planetary gear pins in compact transmissions
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
- electrical erosion on VFD-driven shafts without brush or insulated mounting
- smearing of rollers and journal during idle periods because the radial section holds too little lubricant
Selection pitfalls — read before you substitute
- On a 12 mm seat the housing bore quality dominates life: a bore 0.02 mm out of round pinches the 17 mm ring or cup into a lobed shape, and the rollers then trace the housing's geometry error, not the design load.
- 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.
- Contamination, not fatigue, kills most small needle bearings: with raceways this narrow, one hard particle dents a full-width line — seal the housing even when the bearing execution itself is open.
- The 9.13/10.4 kN ratings and 4.9 g mass are SKF catalogue values transcribed from ch. 7.1 of PUB BU/P1 17000 (PDF table page 616); combined-type axial ratings appear in the text above because the structured record carries radial values only.
Frequently asked questions
Can the K 12x17x13 TN run on an unhardened shaft?
No. In this execution the 12 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.
How should the K 12x17x13 TN be mounted?
Slide the assembly over the ground 12 mm journal with a mounting sleeve, bore the housing to E 17 mm, and retain with a washer spanning the cage. Never press against the cage or rotate before the bearing is lubricated and loaded.
What limits the service life of a K 12x17x13 TN?
Beyond the L10 rating, the practical limits are journal/raceway hardness for the 12 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 12x17x13 TN?
A K 12x17x13 TN measures 12 mm bore/Fw × 17 mm outside diameter × 13 mm width (0.472 × 0.669 × 0.512 in). From SKF catalogue PUB BU/P1 17000: radial dynamic rating C 9.13 kN, static C0 10.4 kN, fatigue limit Pu 1.22 kN, limiting speed 30,000 r/min, reference speed 26,000 r/min, mass about 4.9 g.
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.