AXK120155 bearing: complete specifications & equivalents
The AXK120155 is a ISO 3031 radial bearing sized 120 x 155 x 4 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 120 mm |
| Outer diameter D | 155 mm |
| Width B | 4 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 86.5 kN |
| Basic static load rating C0 | 680 kN |
| Fatigue load limit Pu | 76.5 kN |
| Reference speed (thermal) | 1300 rpm |
| Limiting speed (mechanical) | 2600 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 131 g |
| Manufacturer designation | AXK 120155 |
| 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 | 4.724 in |
|---|---|
| Outer diameter D | 6.102 in |
| Width B | 0.157 in |
| ISO bore code | 55 |
| Radial section height (D−d)/2 | 17.5 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) | 26 of 30 |
| Bore above smallest AXK-series size | 116 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the AXK120155 model number is decoded
In SKF catalogue PUB BU/P1 17000, AXK 120155 denotes the needle thrust assembly whose code reads the raceway diameters directly — 120/155 — intended to run against hardened, ground washers or machine faces. Reading the code: AXK marks the needle thrust assembly and the figures 120/155 give the two raceway diameters in millimetres — 120 mm inner track and 155 mm outer track; TN swaps the stamped steel cage for PA66. At this size the stamped steel cage guides long thrust needles; the TN polymer-cage variant is offered where noise matters. One-direction thrust only. The 131 g mass and 4 mm axial height sit between 120 and 155 mm washer diameters; check the seat shoulder spans the full ring face — a narrow shoulder causes washer fretting long before fatigue does. Keep the assembly concentric with a shaft shoulder or the housing register — a needle set walking radially off its track is the most common failure; the AXW flanged version removes this risk entirely.
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
- edge loading across the needle crowns when the mating faces are not square to the shaft
- smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established
- grease churning and overheating when a high-speed thrust position is over-packed
- electrical erosion of raceways on VFD-driven shafts without grounding or insulation
- needle-row denting from a single hard particle trapped in the 2 mm section
Selection pitfalls — read before you substitute
- Above 110 mm the large AXK sets (120–155 mm) are assembled standing up in vertical gearboxes — retain the cage or it walks off its track before the first bolt is torqued.
- TN polymer and stamped steel cages of the same code (AXK 120155) share envelopes and ratings; the choice is temperature and noise, not load.
- The AXK code supplies no washers: AXK 120155 arrives as the needle cage only, and a "bearing failure" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.
- Match washers by the exact 120–155 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.
- the 1,300 r/min reference speed is the thermal criterion under load, the 2,600 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.
- The 86.5/680 kN ratings and 131 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
Which dimensions does the AXK 120155 have?
A AXK 120155 measures 120 mm bore × 155 mm outside diameter × 4 mm width (4.724 × 6.102 × 0.157 in). From SKF catalogue PUB BU/P1 17000: dynamic C 86.5 kN, static C0 680 kN, fatigue limit Pu 76.5 kN, reference speed 1,300 r/min, limiting speed 2,600 r/min, mass about 131 g. The contact band runs Ea 125–Eb 153 mm; hardened washers or 58–64 HRC faces are required.
What does AXK 120/155 mean?
A needle roller and cage thrust assembly (ISO 3031) for a 120 mm inner track and 155 mm outer track, 4 mm thick; one-direction axial load, washers ordered separately.
What is the difference between AXK and AXW?
AXW pairs the AXK needle set with a washer carrying an integral centring spigot that locates in a housing register, keeping cage and washer concentric as one part; AXK is the bare cage-and-needle set needing two separate washers. The AXW still needs a separate LS/AS washer or hardened face on the opposite side.
Does the AXK 120155 tolerate misalignment?
No — the 4 mm rigid needle set edge-loads on tilted faces. Keep the shaft and housing faces parallel, or choose the self-aligning roller thrust families.
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.