Cycling / Bicycle
⚙️ Bicycle Drivetrain & Drivetrain Hardware
Precision-machined thin-profile toothed rings (cogs/chainrings), small-diameter pins/shafts, threaded fasteners with rolled threads, hollow spindles with bearing interfaces
What is Bicycle Drivetrain & Drivetrain Hardware?
⚙️ Bicycle Drivetrain & Drivetrain Hardware represents a complete system of precision titanium components engineered for Cycling / Bicycle applications. Precision-machined thin-profile toothed rings (cogs/chainrings), small-diameter pins/shafts, threaded fasteners with rolled threads, hollow spindles with bearing interfaces The system integrates 6 distinct component types manufactured through 3 specialized processes.
Key manufacturing processes for this system include CNC turning Swiss-type for drivetrain hardware geometry, Thread rolling DIN 13-1 6g at 200W fiber laser, Vibratory deburring at 200W fiber laser, Go/No-Go ring gauging at 200W fiber laser, Thread rolling DIN 13-1 6g with Class 6g gauge, each selected and qualified to meet component-specific requirements.
Engineering & Design Principles
Material: Grade 5 (Ti-6Al-4V) provides ideal wear resistance, fatigue strength, and 40% weight saving vs steel for drivetrain components. Grade 9 for fasteners requiring cold heading.
Form: CNC machining from plate/bar for cogs and chainrings. Swiss-type turning for pins and spindles. Rolled thread forming for bolts ensures continuous grain flow for fatigue safety.
Standards & Material Specifications
Standards: ASTM B348 Grade 5, STA, rolled threads, 100% dimensional + crack inspection
Engineering Solution Blueprint
Bicycle Drivetrain & Drivetrain Hardware
Cycling · Consumer
1 Part Feature Analysis
Precision-machined thin-profile toothed rings (cogs/chainrings), small-diameter pins/shafts, threaded fasteners with rolled threads, hollow spindles with bearing interfaces
- ⚠️ Rotational inertia reduction
- ⚠️ Wear resistance against chain rollers
- ⚠️ Sweat/rainwater corrosion
- ⚠️ Thread galling in aluminum frames
- ⚠️ Fatigue under sprint torque 1500W+
2 Material Selection Rationale
Grade 5 Ti-6Al-4V — General alpha-beta alloy, high strength
Grade 5 (Ti-6Al-4V) provides ideal wear resistance, fatigue strength, and 40% weight saving vs steel for drivetrain components. Grade 9 for fasteners requiring cold heading.
3 Form Selection Rationale
Round Bar / Rod — for turning, fasteners
CNC machining from plate/bar for cogs and chainrings. Swiss-type turning for pins and spindles. Rolled thread forming for bolts ensures continuous grain flow for fatigue safety.
4 Manufacturing Process & Services
Core Processes:
Toll Processing Services:
Process Pitfalls:
- ⚠️ Chainring tooth profile must match chain roller diameter to +-0.05mm for silent shifting
- ⚠️ BB spindle taper requires +-0.01mm concentricity for bearing preload accuracy
5 Procurement Specifications
ASTM B348 Grade 5 / Grade 9, solution+aged (STA), 100% dimensional + MPI inspected
Manufacturing Process Flow
5-axis CNC milling centers provide simultaneous multi-axis interpolation for complex titanium components. The ability to tilt the tool relative to the
Swiss-type automatic lathes use a sliding headstock and fixed guide bushing to machine slender titanium components. The guide bushing supports the bar
Thread rolling cold-forms threads by displacing material between two reciprocating or rotary dies, rather than cutting it away. Compressive residual s
Components in This System
| Component | Material |
|---|---|
| Titanium Bottom Bracket Spindle | Grade 5 Ti-6Al-4V |
| Titanium Cassette Cog | Grade 5 Ti-6Al-4V |
| Titanium Chainring | Grade 5 Ti-6Al-4V |
| Titanium Chainring Bolt | Grade 5 Ti-6Al-4V |
| Titanium Derailleur Limit Screw | Grade 5 Ti-6Al-4V |
| Titanium Derailleur Pulley | Grade 5 Ti-6Al-4V |
Frequently Asked Questions
What titanium grades are used in Bicycle Drivetrain & Drivetrain Hardware systems?
What manufacturing processes are used for Bicycle Drivetrain & Drivetrain Hardware?
What quality standards apply to Bicycle Drivetrain & Drivetrain Hardware components?
What industries use Bicycle Drivetrain & Drivetrain Hardware?
Can you provide DFM feedback for Bicycle Drivetrain & Drivetrain Hardware designs?
Engineering Trends
- ▸ Process: CNC machining of tooth profiles
- ▸ Process: Thread rolling of all fasteners
- ▸ Process: Swiss-type turning of spindles/pins
Related Manufacturing Capabilities
These specialized processes support Bicycle Drivetrain & Drivetrain Hardware component manufacturing.
One Metal. One Focus. Infinite Precision.
Founded in 2011 in Baoji's Titanium Valley, BOZE Metal is dedicated exclusively to titanium — from raw material to precision engineering. AS9100D, ISO 13485 & ISO 9001 certified with 500+ clients across Aerospace, Medical & Motorsport industries, we deliver end-to-end precision titanium CNC machining with full material traceability from source to component.
Boze Titanium Manufacturing Center is operated by Baoji Boze Metal Products Co., Ltd.
Certifications verified by NADCAP and compliant with ASTM International titanium standards (B265, B348, B381, F136, F2924) and ISO 13485 medical-device QMS.