AXK3047 bearing: complete specifications & equivalents
The AXK3047 is a ISO 3031 radial bearing sized 30 x 47 x 2 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 30 mm |
| Outer diameter D | 47 mm |
| Width B | 2 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 15 kN |
| Basic static load rating C0 | 72 kN |
| Fatigue load limit Pu | 8.3 kN |
| Reference speed (thermal) | 3600 rpm |
| Limiting speed (mechanical) | 7000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 8 g |
| Manufacturer designation | AXK 3047 |
| 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 | 1.181 in |
|---|---|
| Outer diameter D | 1.85 in |
| Width B | 0.079 in |
| ISO bore code | 47 |
| Radial section height (D−d)/2 | 8.5 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) | 11 of 30 |
| Bore above smallest AXK-series size | 26 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the AXK3047 model number is decoded
In SKF catalogue PUB BU/P1 17000, AXK 3047 denotes the needle thrust assembly whose code reads the raceway diameters directly — 30/47 — intended to run against hardened, ground washers or machine faces. In AXK 3047 the number is the boundary plan, not a bore code: 30/47, with the 2 mm assembly thickness fixed by the ISO 3031 plan and Ea/Eb 34/46 mm marking the actual needle-contact band. Washer selection is part of the bearing: too-soft faces rib within weeks even though the 15 kN rating is unchanged — the AXK code only supplies the rolling elements. One direction only: AXK 3047 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. Mounting: harden and grind both mating faces to 58–64 HRC over the full Ea 34–Eb 46 mm band (or fit AS/LS washers), drop the 2 mm cage in flat, and never press or hammer the needle complement.
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
- edge loading across the needle crowns when the mating faces are not square to the shaft
- roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)
- oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips
- hard-particle indentation where oil or grease filtration is inadequate
- needle-row denting from a single hard particle trapped in the 2 mm section
Selection pitfalls — read before you substitute
- On a 30 mm shaft the cage is only 2 mm thick — a shaft shoulder with a sharp edge or a 0.1 mm burr will catch and spin the cage instead of locating it.
- the 3,600 r/min reference speed is the thermal criterion under load, the 7,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.
- The 15 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 AXK code supplies no washers: AXK 3047 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 30–47 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.
- The 15/72 kN ratings and 8 g mass are SKF catalogue values transcribed from ch. 12.1 of PUB BU/P1 17000 (PDF table page 908); 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
What are the dimensions and ratings of the AXK 3047?
A AXK 3047 measures 30 mm bore × 47 mm outside diameter × 2 mm width (1.181 × 1.85 × 0.079 in). From SKF catalogue PUB BU/P1 17000: dynamic C 15 kN, static C0 72 kN, fatigue limit Pu 8.3 kN, reference speed 3,600 r/min, limiting speed 7,000 r/min, mass about 8 g. The contact band runs Ea 34–Eb 46 mm; hardened washers or 58–64 HRC faces are required.
Does the AXK 3047 include washers?
No. AXK is the needle roller and cage thrust assembly only; hardened AS/LS washers or shaft/housing faces at 58–64 HRC, ground over the Ea 34–Eb 46 mm band, supply the two raceways.
How is the AXK 3047 code read?
AXK marks the needle thrust assembly and 30/47 gives the inner 30 mm and outer 47 mm track diameters directly; the assembly is 2 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 15 kN catalogue rating — order certified washers if the shaft/housing cannot be heat treated.
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.