Baoji Huacan New Metal Materials Co., Ltd. manufactures precision-engineered titanium bottom bracket shell BSA components machined from ASTM Grade 5 (Ti-6Al-4V) titanium alloy. Our BSA threaded shells feature the standard 1.37"×24 TPI specification with ISO 6H thread precision, available in 68mm and 73mm widths for road and MTB applications. Weighing ≤180g, these CNC-machined shells eliminate galvanic corrosion and creaking issues common in aluminum alternatives. With over 10 years of titanium machining experience, 40+ high-precision CNC machines, and ISO 9001 certification, we deliver frame components that meet the demands of custom frame builders and OEM manufacturers worldwide. Contact sherry@hc-titanium.com for technical specifications and volume pricing.

Specification	Details
Material Grade	Grade 5 Titanium (Ti-6Al-4V), ASTM B348
Bottom Bracket Standard	BSA Threaded Standard: 1.37" × 24 TPI
Shell Width Options	68mm / 73mm (Custom dimensions available)
Manufacturing Process	CNC machining from titanium bar stock for high precision and durability
Mechanical Properties	Tensile Strength ≥895 MPa
Surface Finish	Precision CNC finish with natural titanium oxide protection

Titanium Bottom Bracket Shell BSA

Custom Titanium Frame Building: Designed for boutique titanium frame builders requiring high-quality, weld-ready bottom bracket shells with excellent compatibility and long-term durability.

Titanium Bicycle Frame Manufacturing: Suitable for professional frame manufacturers producing premium titanium bicycles, providing reliable BSA threaded interfaces with precise CNC machining quality.

OEM & Custom Bicycle Projects: Ideal for OEM/ODM bicycle brands and custom bike projects requiring lightweight, corrosion-resistant titanium components with flexible size and design options.

Prototype & Frame Development: Supports bicycle R&D teams and frame designers developing new geometries or specialty frames with customized shell widths and specifications.

Our titanium bottom bracket shell BSA is designed for high-performance titanium bicycle frame fabrication, offering an excellent balance of strength, lightweight performance, and long-term durability.

Manufactured from ASTM B348 Grade 5 titanium (Ti-6Al-4V), the shell provides superior fatigue resistance and maintains excellent thread stability under high torque cycling conditions. Compared with traditional aluminum components, titanium offers outstanding corrosion resistance and long service life, making it ideal for premium titanium frames.

The naturally formed titanium oxide layer provides excellent corrosion protection and helps minimize galvanic corrosion risks when integrated with titanium frame tubing. This ensures reliable performance in demanding riding environments.

Precision CNC machining with ISO 6H thread tolerance guarantees accurate BSA threading, ensuring smooth installation and reliable engagement with bottom bracket cups while reducing the risk of thread damage during assembly.

Designed for BSA 1.37" × 24 TPI bottom bracket systems, our titanium shells are compatible with widely used cycling bottom bracket solutions, including Shimano, SRAM, and other mainstream crankset systems.

Our titanium bottom bracket shells are manufactured with advanced CNC machining capabilities and strict quality control procedures to ensure consistent precision and reliability.

We support both prototype development and batch production for custom titanium frame builders and bicycle manufacturers. Flexible manufacturing capabilities allow us to handle different designs, dimensions, and production requirements while maintaining stable quality and delivery performance.

Each batch is produced with full material traceability and inspected to ensure dimensional accuracy, thread quality, and long-term performance.


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During machining, critical dimensions such as shell width, bore accuracy, and BSA thread specifications are carefully controlled to meet customer requirements and ensure precise assembly performance.

Coordinate measuring machines verify thread pitch accuracy to ISO standards. Tensile testing confirms mechanical properties meet specification minimums. Salt spray chambers validate corrosion resistance claims through 720-hour exposure cycles.

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Quality control starts with raw material inspection. We use certified ASTM B348 Grade 5 titanium materials with full traceability to ensure material reliability and consistency.

Q: Why choose a titanium bottom bracket shell instead of aluminum?

A: Titanium offers an excellent combination of high strength, fatigue resistance, lightweight performance, and corrosion resistance. Compared with traditional aluminum components, titanium provides long-term durability and reliable thread performance, making it ideal for premium titanium bicycle frames.

A: Our titanium bottom bracket shell is designed for the BSA 1.37" × 24 TPI threaded standard and is compatible with widely used BSA bottom bracket systems from major bicycle component brands.

A: Yes. We provide OEM and custom CNC machining services, including customized shell widths, external dimensions, weight optimization designs, and logo engraving to meet different frame fabrication requirements.

A: Yes. We provide material certificates (MTC) and quality documents upon request, ensuring full material traceability and quality verification for OEM manufacturers and custom titanium frame builders.

Contact our technical team at sherry@hc-titanium.comfor detailed specifications, volume pricing, and custom machining capabilities. Let's discuss your titanium component requirements today.