Custom CNC Machining Bicycle Hub Shells
Precision manufacturing for bicycle Hubs.
Tolerances ±0.01 mm — Material -aluminum T6 / 7075-T6 / titanium /stainless steel
- No MOQ
- 5‑axis machining
- In-house anodizing
- ISO 9001
Real-World CNC Machining Samples
Why CNC Machining Hub Shells?
Casting and forging have their place, but for performance, precision, and design flexibility — CNC machining is the choice of leading brands and custom builders.
- Tight tolerances — bearing seats machined to ±0.01 mm (±0.0004″) for perfect press-fit every time.
- No tooling investment — go from CAD to finished part without expensive molds or dies.
- Design iteration — modify your design between batches at zero tooling cost.
- Complex geometries — integrate flanges, spoke holes, and bearing seats in a single setup.
- Material versatility — 6061-T6, 7075-T6, titanium, stainless steel — all on the same machine.
- Lightweighting — aggressive material removal achieves weight targets castings can't match.
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Consistency — every part matches the first, critical for production runs.
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Integrated structure — no welded flanges, no weak points.
Choose Your Material
Select the alloy that matches your performance requirements, weight targets, and budget.
6061‑T6 Aluminum
The versatile workhorse
Excellent machinability, good strength-to-weight ratio, and outstanding corrosion resistance. Takes anodizing beautifully.
✔ Cost-effective for production runs
✔ Great anodizing response
✔ Ideal for commuter & road hubs
7075‑T6 Aluminum
High-performance choice
Nearly twice the tensile strength of 6061. Superior wear resistance and dimensional stability under load.
✔ Tensile strength >500 MPa
✔ Perfect for MTB & e‑bike hubs
✔ Excellent fatigue resistance
Titanium & Stainless
Premium & heavy-duty
Titanium for ultralight racing builds. Stainless steel (304/316) for industrial and corrosion-critical applications.
✔ Highest strength-to-weight ratio
✔ Excellent corrosion resistance
✔ Premium aftermarket appeal
From Billet to Finished Hub Shell
Every hub shell starts as a solid bar and ends as a precision component. Here’s how we get there.
CNC Turning
The primary operation. We turn the outer diameter, inner bore, and bearing seats in a single setup.
- ±0.01 mm on bearing seats · perfect concentricity
CNC Milling
Flange profiling, spoke hole drilling, countersinking, and lightening pockets — all on a 4‑ or 5‑axis mill.
- 24, 28, 32, or 36 holes · precise angular spacing
Finishing & Inspection
Deburring, thread tapping, surface finishing, and full dimensional inspection of every critical feature.
- CMM inspection · bore gauges · surface finish verification
- In-house anodizing available after machining — clear, black, hard coat, or custom colors.
Speed Meets Precision at MachMaster
See our team, process, and precision in action at Xiamen MachMaster Co., Ltd—where every part is backed by expertise, systems, and measurable results.
Design Considerations
for Hub Shells
Get your design manufacturing-ready. Here’s what we recommend for optimal CNC machinability.
Bearing Seat Tolerances
Specify ±0.01 mm (±0.0004″) on bearing seats. Too loose and bearings spin in the housing; too tight and they bind or distort. We maintain this consistently across every run.
Concentricity
Bearing seats and outer diameters must be perfectly concentric. Any deviation creates vibration at speed. CNC turning in a single setup guarantees this alignment.
Flange Strength vs. Weight
Flanges must be thick enough to withstand spoke tension without deforming, but thin enough to keep weight down. CNC milling gives you precise control over flange thickness and profile.
Spoke Hole Geometry
Spoke holes should be drilled at the correct angle to match the spoke line — typically perpendicular to the flange surface. Countersinks must be deep enough to seat the spoke head without cracking the flange.
Who Uses CNC Machined Hub Shells?
Brands, OEMs, and aftermarket manufacturers across the bicycle and motorcycle industries.
- Road bike hubs
- Mountain bike hubs
- E‑bike hubs
- Track / Fixed-gear hubs
- Racing motorcycle hubs
- Off-road / Dirt bike hubs
- Custom motorcycle builds
- Electric motorcycle hubs
- Aftermarket / Custom builds
Ready to Machine Your Hub Shell?
Upload your CAD file or reach out to our engineering team. We’ll review your design and get back to you with a quote within 24 hours.
- No MOQ
- No tooling costs
- Free design review
