AXK90120 bearing: complete specifications & equivalents
The AXK90120 is a ISO 3031 radial bearing sized 90 x 120 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 | 90 mm |
| Outer diameter D | 120 mm |
| Width B | 4 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 65.5 kN |
| Basic static load rating C0 | 405 kN |
| Fatigue load limit Pu | 49 kN |
| Reference speed (thermal) | 1500 rpm |
| Limiting speed (mechanical) | 3000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 86 g |
| Manufacturer designation | AXK 90120 |
| 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 | 3.543 in |
|---|---|
| Outer diameter D | 4.724 in |
| Width B | 0.157 in |
| ISO bore code | 20 |
| Radial section height (D−d)/2 | 15 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) | 23 of 30 |
| Bore above smallest AXK-series size | 86 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the AXK90120 model number is decoded
In SKF catalogue PUB BU/P1 17000, AXK 90120 denotes the needle thrust assembly whose code reads the raceway diameters directly — 90/120 — intended to run against hardened, ground washers or machine faces. SKF prints the AXK sizes as adjacent figures, so 90/120 reads 90 then 120 mm; the assembly has no washers of its own — order AS/LS washers or harden the mating faces. The thin section tolerates no misalignment: keep the mating faces parallel, and use the AXW spigot-flanged execution where a one-piece, housing-centred cage-plus-washer unit simplifies assembly. One direction only: AXK 90120 cannot be reversed to take opposite thrust — mirror a second bearing for reversing shafts, and keep housing and shaft seats square within the ISO 104 tolerances. 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
- compact drives where hardened washers replace a machined raceway shoulder
- automotive manual and automatic transmission thrust positions
- torque converter and clutch release assemblies in passenger cars
- small gearbox gears that need a 2 mm thrust shim between a shaft and face
Known failure patterns
- needle-row denting from a single hard particle trapped in the 2 mm section
- 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
- instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish
Selection pitfalls — read before you substitute
- At 90 mm track diameter, face hardness decides everything: a ground-but-soft washer looks correct yet ribbons within months; specify 58–64 HRC on the drawing.
- Match washers by the exact 90–120 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.
- the 1,500 r/min reference speed is the thermal criterion under load, the 3,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.
- The AXK code supplies no washers: AXK 90120 arrives as the needle cage only, and a "bearing failure" on hard-faced tracks is usually a missing-AS-washer failure at ordering time.
- The 65.5 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 65.5/405 kN ratings and 86 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
Does the AXK 90120 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.
Why does an AXK assembly fail early?
Almost always the track: missing/undersized washers, hardness below 58 HRC, a sharp shoulder edge catching the cage, or contamination in the thin section. Rating 65.5 kN assumes all of these are correct.
Which dimensions does the AXK 90120 have?
A AXK 90120 measures 90 mm bore × 120 mm outside diameter × 4 mm width (3.543 × 4.724 × 0.157 in). From SKF catalogue PUB BU/P1 17000: dynamic C 65.5 kN, static C0 405 kN, fatigue limit Pu 49 kN, reference speed 1,500 r/min, limiting speed 3,000 r/min, mass about 86 g. The contact band runs Ea 94–Eb 118 mm; hardened washers or 58–64 HRC faces are required.
What does AXK 90/120 mean?
A needle roller and cage thrust assembly (ISO 3031) for a 90 mm inner track and 120 mm outer track, 4 mm thick; one-direction axial load, washers ordered separately.
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.