AXK140180 bearing: complete specifications & equivalents
The AXK140180 is a ISO 3031 radial bearing sized 140 x 180 x 5 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 140 mm |
| Outer diameter D | 180 mm |
| Width B | 5 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 116 kN |
| Basic static load rating C0 | 900 kN |
| Fatigue load limit Pu | 96.5 kN |
| Reference speed (thermal) | 1000 rpm |
| Limiting speed (mechanical) | 2000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 219 g |
| Manufacturer designation | AXK 140180 |
| Standard | ISO 3031 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies |
| Last verified | 2026-09-27 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies) · extracted 2026-09-27
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust 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 & AXK-series range
| Bore d | 5.512 in |
|---|---|
| Outer diameter D | 7.087 in |
| Width B | 0.197 in |
| ISO bore code | 80 |
| Radial section height (D−d)/2 | 20 mm |
| Smallest bore in AXK-series | 4 mm |
| Largest outer diameter in AXK-series | 200 mm |
| Width range across AXK-series | 2–5 mm |
| Bore position in AXK-series (smallest first) | 28 of 30 |
| Bore above smallest AXK-series size | 136 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the AXK140180 model number is decoded
In SKF catalogue PUB BU/P1 17000, AXK 140180 denotes the needle thrust assembly whose code reads the raceway diameters directly — 140/180 — intended to run against hardened, ground washers or machine faces. In AXK 140180 the number is the boundary plan, not a bore code: 140/180, with the 5 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 146/177 mm marking the actual needle-contact band. Washer selection is part of the bearing: too-soft faces rib within weeks even though the 116 kN rating is unchanged — the AXK code only supplies the rolling elements. The 219 g mass and 5 mm axial height sit between 140 and 180 mm washer diameters; check the seat shoulder spans the full ring face — a narrow shoulder causes washer fretting long before fatigue does. Grease both faces before assembly so the needles stay in their pockets, especially for the 5 mm thin set; after fitting, rotate slowly and confirm the cage does not catch on the shoulder edges.
Typical equipment & failure modes
Common applications
- light turntables, index plates and office-machine pivots
- two-wheeler gearbox selector and layshaft thrust faces
- compact drives where hardened washers replace a machined raceway shoulder
- automotive manual and automatic transmission thrust positions
Known failure patterns
- needle-row denting from a single hard particle trapped in the 2 mm section
- cage wear from rollers being dragged through unloaded zones under fluctuating thrust
- abrasive paste forming as dust bypasses the housing seals into the open washer set
- condensation pitting in machines that run intermittently in humid environments
- instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish
Selection pitfalls — read before you substitute
- Above 110 mm the large AXK sets (140–180 mm) are assembled standing up in vertical gearboxes — retain the cage or it walks off its track before the first bolt is torqued.
- Do not expect misalignment tolerance: a 5 mm rigid needle set edge-loads if the faces tilt even a fraction of a degree — use a spherical or AXW solution where the seat cannot be kept parallel.
- TN polymer and stamped steel cages of the same code (AXK 140180) share envelopes and ratings; the choice is temperature and noise, not load.
- the 1,000 r/min reference speed is the thermal criterion under load, the 2,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.
- The 116 kN rating is real only at 58–64 HRC face hardness; visual inspection cannot tell a 45 HRC washer from a 60 HRC one — order certified washers.
- The 116/900 kN ratings and 219 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 910); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only.
Frequently asked questions
How is the AXK 140180 code read?
AXK marks the needle thrust assembly and 140/180 gives the inner 140 mm and outer 180 mm track diameters directly; the assembly is 5 mm thick. TN means the polymer cage instead of stamped steel.
What minimum hardness do the mating faces need?
58–64 HRC with a ground raceway finish. A softer face looks fine after assembly but the needles rib and score it within weeks despite the 116 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated.
How is an AXK thrust assembly mounted?
Harden or washer-face both tracks across Ea 146–Eb 177 mm, keep faces parallel, locate the cage concentrically against a shoulder or register, grease the needles so they stay pocketed, and never press through them.
What are the dimensions and ratings of the AXK 140180?
A AXK 140180 measures 140 mm bore × 180 mm outside diameter × 5 mm width (5.512 × 7.087 × 0.197 in). From SKF catalogue PUB BU/P1 17000: dynamic C 116 kN, static C0 900 kN, fatigue limit Pu 96.5 kN, reference speed 1,000 r/min, limiting speed 2,000 r/min, mass about 219 g. The contact band runs Ea 146–Eb 177 mm; hardened washers or 58–64 HRC faces are required.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 12.1 needle roller and cage thrust assemblies on 2026-09-27. Read our editorial & correction policy.