AXK1226 bearing: complete specifications & equivalents
The AXK1226 is a ISO 3031 radial bearing sized 12 x 26 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 | 12 mm |
| Outer diameter D | 26 mm |
| Width B | 2 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 9.15 kN |
| Basic static load rating C0 | 30 kN |
| Fatigue load limit Pu | 3.45 kN |
| Reference speed (thermal) | 5000 rpm |
| Limiting speed (mechanical) | 10000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3 g |
| Manufacturer designation | AXK 1226 |
| 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 | 0.472 in |
|---|---|
| Outer diameter D | 1.024 in |
| Width B | 0.079 in |
| ISO bore code | 26 |
| Radial section height (D−d)/2 | 7 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) | 6 of 30 |
| Bore above smallest AXK-series size | 8 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the AXK1226 model number is decoded
In SKF catalogue PUB BU/P1 17000, AXK 1226 denotes the needle thrust assembly whose code reads the raceway diameters directly — 12/26 — intended to run against hardened, ground washers or machine faces. The designation AXK 1226 identifies a 2 mm needle thrust cage for the 12–26 mm track; the same diameters select the matching hardened washers, which is the usual ordering error to avoid. Washer selection is part of the bearing: too-soft faces rib within weeks even though the 9.15 kN rating is unchanged — the AXK code only supplies the rolling elements. One direction only: AXK 1226 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 14–Eb 25 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
- The AXK 1226 is watchmaking-scale (2 mm thick, 3 g): handle it with tweezers, grease it onto its washer, and assume one dropped or cocked assembly is one ruined bearing.
- the 5,000 r/min reference speed is the thermal criterion under load, the 10,000 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.
- The 9.15 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 1226 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 12–26 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.
- The 9.15/30 kN ratings and 3 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 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 9.15 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 14–Eb 25 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 1226?
A AXK 1226 measures 12 mm bore × 26 mm outside diameter × 2 mm width (0.472 × 1.024 × 0.079 in). From SKF catalogue PUB BU/P1 17000: dynamic C 9.15 kN, static C0 30 kN, fatigue limit Pu 3.45 kN, reference speed 5,000 r/min, limiting speed 10,000 r/min, mass about 3 g. The contact band runs Ea 14–Eb 25 mm; hardened washers or 58–64 HRC faces are required.
Does the AXK 1226 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 14–Eb 25 mm band, supply the two raceways.
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.