NKIA5914 bearing: complete specifications & equivalents
The NKIA5914 is a DIN 616 radial bearing sized 70 x 100 x 40 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 70 mm |
| Outer diameter D | 100 mm |
| Width B | 40 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 84.2 kN |
| Basic static load rating C0 | 163 kN |
| Fatigue load limit Pu | 20.8 kN |
| Reference speed (thermal) | 5000 rpm |
| Limiting speed (mechanical) | 5600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 980 g |
| Manufacturer designation | NKIA 5914 |
| Standard | DIN 616 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.7 needle roller / angular contact ball bearings |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.7 needle roller / angular contact ball bearings) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.7 needle roller / angular contact ball bearings); 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 & NKIA-series range
| Bore d | 2.756 in |
|---|---|
| Outer diameter D | 3.937 in |
| Width B | 1.575 in |
| ISO bore code | 14 |
| Radial section height (D−d)/2 | 15 mm |
| Smallest bore in NKIA-series | 12 mm |
| Largest outer diameter in NKIA-series | 100 mm |
| Width range across NKIA-series | 16–40 mm |
| Bore position in NKIA-series (smallest first) | 15 of 15 |
| Bore above smallest NKIA-series size | 58 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the NKIA5914 model number is decoded
NKIA 5914 is the combined needle roller / angular contact ball bearings entry for a 70 mm shaft: needle rollers run the radial load while the angular contact ball set takes axial force primarily in one direction, in a single machined envelope of 70×100×40 mm. The NKIA 5914 code breaks into series letters (needle roller + ball), dimension series 59, and the two-digit bore reference for 70 mm; the 40 mm width covers both the roller cage and the offset ball set (offset per catalogue s column). NKIB three-point contact ball raceways accept axial load in both directions, while NKIA angular contact ball raceways lean the axial capacity toward one direction — check the load direction before ordering either. Speed ceilings differ by part: 5,000 r/min thermal reference and 5,600 r/min limiting — the thrust element governs, since its washer faces see sliding components of contact. Mounting: press on the inner ring faces only — the ball set offset (a catalogue-listed offset) makes the unit sensitive to bending; support both rings square to the 70 mm seat and never drive through the rolling elements.
Typical equipment & failure modes
Common applications
- spindle heads needing compact radial-plus-axial support
- lead-screw and ball-screw support positions
- pump rotors with hydraulic axial pull
- bevel gear shafts with moderate axial force
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
- rolling-contact fatigue spalling after the rated L10 life
- thrust washer raceway wear from reverse axial shocks the one-direction thrust part cannot carry
Selection pitfalls — read before you substitute
- Above 50 mm bore, thermal growth matters: the 70 mm inner ring or journal grows with temperature faster than the housing, and the small clearance of a needle roller contact leaves little reserve — check running clearance hot, not just at assembly.
- Do not interchange envelope-identical needle families blindly: NKIA 5914 shares its 70×100×40 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 5,000 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.
- Minimum axial load is a real requirement: below the catalogue minimum the thrust elements skid, polish their raceways and lose them — springs or preload washers belong in the arrangement drawing, not the troubleshooting notes.
- Height stack-up is easy to mis-check: the ball-raceway part adds height beyond a plain needle bearing, and clamping the stack solid over it preloads the thrust set beyond its rating.
- The 84.2/163 kN ratings and 980 g mass are SKF catalogue values transcribed from ch. 7.7 of PUB BU/P1 17000 (PDF table page 654); combined-type axial ratings appear in the text above because the structured record carries radial values only.
Frequently asked questions
How should the NKIA 5914 be mounted?
Press on the ring faces only with a fitting sleeve, keep everything square to the 70 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.
What limits the service life of a NKIA 5914?
Beyond the L10 rating, the practical limits are journal/raceway hardness for the 70 mm seat, lubricant condition at the roller ends, and contamination through open ends — the 15.0 mm radial section leaves no reserve once a raceway is dented or ribboned.
What are the dimensions and ratings of the NKIA 5914?
A NKIA 5914 measures 70 mm bore/Fw × 100 mm outside diameter × 40 mm width (2.756 × 3.937 × 1.575 in). From SKF catalogue PUB BU/P1 17000: radial dynamic rating C 84.2 kN, static C0 163 kN, fatigue limit Pu 20.8 kN, limiting speed 5,600 r/min, reference speed 5,000 r/min, mass about 980 g. Axial ratings of the ball part: dynamic Ca 13.2 kN (Ca), static C0a 25 kN (C0a); angular contact geometry leans axial capacity toward one direction.
How is the NKIA 5914 designation read?
NKIA combines a needle roller cage with an angular contact ball bearing in one unit; 595914 gives the series and 70 mm bore. The offset (a catalogue-listed offset) positions the ball raceway inside the 40 mm overall width.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.7 needle roller / angular contact ball bearings on 2026-09-26. Read our editorial & correction policy.