Titanium Bottom Bracket Spindle is a lightweight hollow bottom bracket component engineered for Hollow bottom bracket axle spindle. Forged and CNC machined from Grade 5 Ti-6Al-4V, it achieves 40-45% weight savings versus steel while maintaining the fatigue life required for demanding cycling applications. Threaded interfaces are designed to prevent galling in outdoor environments.
Titanium Bottom Bracket Spindle
| Technical Parameter | Specification |
|---|---|
| Component SKU | TI-CYC-DRIV-BOTTOM |
| Standards & Specifications | ISO 2768-mASTM B348MIL-STD-810H |
| Surface Finish | Tumble finished Ra 0.8um + passivation |
Titanium Bottom Bracket Spindle
Hollow bottom bracket axle spindle
| Technical Parameter | Specification Value |
|---|---|
| International Compliance | ISO 2768-m, ASTM B348, MIL-STD-810H |
| Surface Finish & Max Temp | Tumble finished Ra 0.8um + passivation |
| NDT & Quality Control | Ultrasonic Testing (UT) per ASTM A388; Liquid Penetrant Inspection (LPI) per ASTM E1417; Dimensional verification via CMM |
- • 100% Traceability: Mill Test Certificate (EN 10204 3.1) with heat analysis & mechanical testing.
- • NDT Verification: Ultrasonic Testing (UT) per ASTM A388; Liquid Penetrant Inspection (LPI) per ASTM E1417; Dimensional verification via CMM.
- • Compliance: REACH, RoHS 3 certified. FAI AS9102 available.
- • Process: CNC swiss turning, diamond-cut beveling, PVD coating, optical gauging.
- • Thermal Stress Relief: Post-machining vacuum annealing (540-675°C under Argon) reduces distortion risk >70%.
- • Rolled Threads: Thread rolling (not cutting) increases fatigue limits by 30-50%.
Q: What surface finishes are compatible with Titanium Bottom Bracket Spindle for cycling use? ▼
Titanium Bottom Bracket Spindle can be supplied with bead-blasted matte (Ra 1.6-3.2 µm), brushed satin, mirror polish, or PVD-colored finish. Bead-blasted + passivation is the standard for hollow bottom bracket as it provides the best balance of cosmetic consistency, corrosion resistance, and cost. Anodized colors (gold, blue, purple per ASTM B136) are available on request.
Q: What is the typical lead time for Titanium Bottom Bracket Spindle orders? ▼
Standard lead time for Titanium Bottom Bracket Spindle is 15-25 business days depending on quantity and complexity. Rush orders (3-5 working days) are available for prototype evaluation. Sample evaluation (1-5 units) can be expedited to 5-7 business days. Volume pricing is available for production quantities above 100 units.
Q: What material certifications are provided with Titanium Bottom Bracket Spindle? ▼
Each Titanium Bottom Bracket Spindle shipment includes EN 10204 Type 3.1 mill test certificate with chemical analysis, mechanical properties, and heat identification. Dimensional inspection reports and Certificate of Conformance (CoC) are standard. First Article Inspection Reports (FAIR) per AS9102 are available on request for hollow bottom bracket.
§ Why Grade 5 Ti-6Al-4V for hollow bottom bracket
Function
Designed for Cycling / Bicycle applications, this component fulfills the role of . The use of Grade 5 Ti-6Al-4V ensures long-term reliability in this Drivetrain Hardware configuration.
Specifications
- SKU: TI-CYC-DRIV-BOTTOM
- Category: Drivetrain Hardware
- Industry: Cycling / Bicycle
- Material: Grade 5 Ti-6Al-4V
- Process: CNC swiss turning, diamond-cut beveling, PVD coating, optical gauging
- Weight: Typical 45% weight reduction over AISI 4140 steel at equivalent yield strength
§ Fatigue & Dimensional Inspection Protocol
Quality Management
Manufactured under ISO 9001:2015 with full EN 10204 Type 3.1 material traceability from ingot to finished Titanium Bottom Bracket Spindle. All critical features are CMM-verified and documented in the First Article Inspection Report.
Inspection & NDT
100% CMM dimensional inspection per ISO 10360 on critical features; surface roughness verification per ISO 4287; material grade verification via PMI
§ Lightweight Component Manufacturing Process
Titanium Bottom Bracket Spindle is manufactured using cnc swiss turning, diamond-cut beveling, pvd coating, optical gauging. Each operation is performed by certified machinists with real-time process monitoring and dimensional verification at critical stages. Heat code traceability is maintained throughout all production steps.
Commercial Logistics & Procurement Framework
Pricing and lead times for Titanium Bottom Bracket Spindle are batch-dependent. Contact our supply chain team for volume-based tiered pricing.
Regulatory & Quality Assurance Ledger
Verifiable certifications for Titanium Bottom Bracket Spindle
Material Test Certificate (MTC)
EN 10204 3.1
Environmental Compliance
REACH (EC No 1907/2006)
Restricted Substances
RoHS 3 Directive (2015/863/EU)
Quality Management System
AS9100D
Standard: ISO 2768-m
ISO 2768-m
Standard: ASTM B348
Standard: MIL-STD-810H
MIL-STD-810H
Systems Interconnectivity & Topology
Cross-functional integration matrix for Tier-1 supply chains and assembly orchestration.
- ▸ Main Housing Assembly
- ▸ Secondary Structure Carrier
Titanium Bottom Bracket Spindle
Material: Grade 5 Ti-6Al-4V
SKU: TI-CYC-DRIV-BOTTOM
Industry: Cycling / Bicycle / System: Bicycle Drivetrain & Drivetrain Hardware
- ▸ Spacer Washer Kit
- ▸ Thread Locker Application
- ▸ Calibration Certificate
Request Enterprise Pricing
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Related Knowledge
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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.