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

6 Components 1 Materials 3 Processes 6 Standards

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 0.5mm corner radius, 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

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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:

CNC machining of tooth profilesThread rolling of all fastenersSwiss-type turning of spindles/pinsAnodizing/DLC coating

Toll Processing Services:

CMM tooth profile inspectionHardness testingFatigue testing (sprint load simulation)MPI of threads

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

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Manufacturing Process Flow

1
CNC machining of tooth profiles

5-axis CNC milling centers provide simultaneous multi-axis interpolation for complex titanium components. The ability to tilt the tool relative to the

2
Swiss-type turning of spindles/pins

Swiss-type automatic lathes use a sliding headstock and fixed guide bushing to machine slender titanium components. The guide bushing supports the bar

3
Thread rolling of all fasteners

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 Bolt Grade 5 Ti-6Al-4V
Titanium Chainring 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?
Bicycle Drivetrain & Drivetrain Hardware components are manufactured from Grade 5 Ti-6Al-4V. The specific grade is selected based on mechanical property requirements, corrosion resistance needs, and Cycling / Bicycle industry regulations.
What manufacturing processes are used for Bicycle Drivetrain & Drivetrain Hardware?
The Bicycle Drivetrain & Drivetrain Hardware system components are produced using 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 0.5mm corner radius, Vibratory deburring with 0.5mm corner radius. Each process is selected and qualified to meet the specific dimensional, metallurgical, and surface requirements of each component within the system.
What quality standards apply to Bicycle Drivetrain & Drivetrain Hardware components?
Bicycle Drivetrain & Drivetrain Hardware components are manufactured to ISO 2768-m (hollow bottom applied), ISO 2768-m (lightweight cassette applied), ISO 4210 (chainring fixing applied), ASTM B348 (dished chainring applied), ASTM B348 (frontrear derailleur applied) and other applicable specifications. Full material traceability, dimensional inspection reports, and certificates of conformance are provided with each shipment.
What industries use Bicycle Drivetrain & Drivetrain Hardware?
Bicycle Drivetrain & Drivetrain Hardware systems are deployed in Cycling / Bicycle applications. Each industry has specific regulatory and performance requirements that drive material selection and process qualification.
Can you provide DFM feedback for Bicycle Drivetrain & Drivetrain Hardware designs?
Yes. Our engineering team provides free Design for Manufacturability (DFM) analysis for Bicycle Drivetrain & Drivetrain Hardware projects. Upload your CAD file (STEP, DXF, or DWG format) and our team will review your design within 24 hours.

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.

CNC machining of tooth profiles Swiss-type turning of spindles/pins Thread rolling of all fasteners
About Boze Titanium Manufacturing Center

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 CNC Ti is the dedicated titanium manufacturing center of Baoji Boze Metal Products Co., Ltd.

AS9100D ISO 13485 ISO 9001 500+ Clients 15+ Years OEM/ODM
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