AXK75100 bearing: complete specifications & equivalents
The AXK75100 is a ISO 3031 radial bearing sized 75 x 100 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 | 75 mm |
| Outer diameter D | 100 mm |
| Width B | 4 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel |
| Basic dynamic load rating C | 50 kN |
| Basic static load rating C0 | 265 kN |
| Fatigue load limit Pu | 32.5 kN |
| Reference speed (thermal) | 1700 rpm |
| Limiting speed (mechanical) | 3400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 61 g |
| Manufacturer designation | AXK 75100 |
| 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 | 2.953 in |
|---|---|
| Outer diameter D | 3.937 in |
| Width B | 0.157 in |
| ISO bore code | 00 |
| Radial section height (D−d)/2 | 12.5 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) | 20 of 30 |
| Bore above smallest AXK-series size | 71 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the AXK75100 model number is decoded
In SKF catalogue PUB BU/P1 17000, AXK 75100 denotes the needle thrust assembly whose code reads the raceway diameters directly — 75/100 — intended to run against hardened, ground washers or machine faces. Reading the code: AXK marks the needle thrust assembly and the figures 75/100 give the two raceway diameters in millimetres — 75 mm inner track and 100 mm outer track; TN swaps the stamped steel cage for PA66. 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. Speed planning separates the 1,700 r/min thermal reference from the 3,400 r/min mechanical limiting speed. Thrust bearings govern the thermal speed of many vertical arrangements, and oil circulation raises the usable speed substantially above grease values. 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
- torque converter and clutch release assemblies in passenger cars
- small gearbox gears that need a 2 mm thrust shim between a shaft and face
- light turntables, index plates and office-machine pivots
- two-wheeler gearbox selector and layshaft thrust faces
Known failure patterns
- instant raceway scoring when the assembly runs against a face below 58 HRC or with a rough finish
- 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
- edge loading across the needle crowns when the mating faces are not square to the shaft
Selection pitfalls — read before you substitute
- At 75 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.
- The 50 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 4 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.
- Match washers by the exact 75–100 mm track — a washer sized to the shaft alone leaves the needles overrunning its edge, which shears the cage.
- the 1,700 r/min reference speed is the thermal criterion under load, the 3,400 r/min limiting speed assumes hardened, ground, oiled faces; soft or dry faces drop the real ceiling drastically.
- The 50/265 kN ratings and 61 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 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 75100 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 50 kN assumes all of these are correct.
Which dimensions does the AXK 75100 have?
A AXK 75100 measures 75 mm bore × 100 mm outside diameter × 4 mm width (2.953 × 3.937 × 0.157 in). From SKF catalogue PUB BU/P1 17000: dynamic C 50 kN, static C0 265 kN, fatigue limit Pu 32.5 kN, reference speed 1,700 r/min, limiting speed 3,400 r/min, mass about 61 g. The contact band runs Ea 79–Eb 98 mm; hardened washers or 58–64 HRC faces are required.
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.