AXK1730 bearing: complete specifications & equivalents
The AXK1730 is a ISO 3031 radial bearing sized 17 x 30 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 | 17 mm |
| Outer diameter D | 30 mm |
| Width B | 2 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 11 kN |
| Basic static load rating C0 | 40.5 kN |
| Fatigue load limit Pu | 4.75 kN |
| Reference speed (thermal) | 4500 rpm |
| Limiting speed (mechanical) | 9500 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 3.65 g |
| Manufacturer designation | AXK 1730 |
| 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 | 0.669 in |
|---|---|
| Outer diameter D | 1.181 in |
| Width B | 0.079 in |
| ISO bore code | 30 |
| Radial section height (D−d)/2 | 6.5 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) | 8 of 30 |
| Bore above smallest AXK-series size | 13 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the AXK1730 model number is decoded
In SKF catalogue PUB BU/P1 17000, AXK 1730 denotes the needle thrust assembly whose code reads the raceway diameters directly — 17/30 — intended to run against hardened, ground washers or machine faces. Reading the code: AXK marks the needle thrust assembly and the figures 17/30 give the two raceway diameters in millimetres — 17 mm inner track and 30 mm outer track; TN swaps the stamped steel cage for PA66. Small AXK sizes are offered with the glass-fibre TN cage or the stamped steel cage; both are 2 mm-class sections. One-direction thrust only. One direction only: AXK 1730 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. Grease both faces before assembly so the needles stay in their pockets, especially for the 2 mm thin set; after fitting, rotate slowly and confirm the cage does not catch on the shoulder edges.
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
- instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish
- 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
- false brinelling and rust-red witness marks on standby machines under external vibration
- edge loading across the needle crowns when the mating faces are not square to the shaft
Selection pitfalls — read before you substitute
- The AXK 1730 is watchmaking-scale (2 mm thick, 3.65 g): handle it with tweezers, grease it onto its washer, and assume one dropped or cocked assembly is one ruined bearing.
- The 11 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.
- Do not expect misalignment tolerance: a 2 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 1730) share envelopes and ratings; the choice is temperature and noise, not load.
- The AXK code supplies no washers: AXK 1730 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 11/40.5 kN ratings and 3.65 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 does AXK 17/30 mean?
A needle roller and cage thrust assembly (ISO 3031) for a 17 mm inner track and 30 mm outer track, 2 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 1730 tolerate misalignment?
No — the 2 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 11 kN assumes all of these are correct.
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.