Titanium Dropouts CNC Machined for High-Performance Bicycle Frames — Precision Custom Parts Built to Your Specs

Titanium dropouts CNC machined from solid Grade 5 Ti-6Al-4V billets deliver the structural precision that premium bicycle frames demand. At Baoji Huacan, we machine rear axle interfaces with tolerances of ±0.01 mm, surface finish Ra ≤1.6 μm, and a material density of 4.43 g/cm³. With 40+ CNC machines and 10+ years of titanium machining experience, we support full OEM/ODM customization based on your drawings or 3D models.

Parameter	Detail
Material	Grade 5 (Ti-6Al-4V), Grade 2, Grade 9, Grade 23 — other titanium grades available upon request
Material Standard	ASTM B348, AMS 4928, DIN / ASME standards, according to material grade and customer requirements
Dropout Type	Thru-axle, quick-release, custom mounting configurations
Axle Compatibility	12 mm, 12×142 mm, 12×148 mm, 15 mm and other specifications — customized per drawing
Overall Dimensions	Customized according to customer drawings; typical machining size up to 300 × 300 × 150 mm
Dimensional Tolerance	Standard ±0.02 mm; up to ±0.01 mm for critical features, subject to part geometry
Surface Roughness	Ra ≤1.6 μm standard; Ra ≤0.8 μm available for specified surfaces
Surface Finish	As-machined, bead blasted, brushed, polished, titanium anodized / color anodized
CNC Machining	3-axis / 4-axis / 5-axis CNC machining; drilling, tapping, reaming and precision contour machining
Customization & Inspection	OEM/ODM supported; CMM inspection, dimensional reports and material certificates available upon request

Titanium dropouts

· Micron-level accuracy — ±0.01 mm tolerance for bearing seats and axle interfaces

· High fatigue resistance — solid billet structure handles cyclic rear-wheel loading reliably

· Natural corrosion resistance — no coatings required, performs in all outdoor environments

· Integrated features — derailleur hanger threads, brake mount surfaces, and axle threads in one part

· Lightweight construction — 4.43 g/cm³ density keeps your build light without sacrificing stiffness

High-Performance Road Bikes

Titanium dropouts application

Mountain & Gravel Bikes

Titanium dropouts application

Custom Titanium Bicycle Frames

Titanium dropouts application

· High-end road and gravel bicycle frames

· Custom titanium mountain bike frames

· E-bike frames requiring high torque capacity (suitable for 1000W+ mid-drive systems)

· Premium custom frame builders and boutique framesets

· OEM titanium frame manufacturers seeking consistent batch supply

These parts sit at the most mechanically demanding junction of any bicycle frame — where the rear wheel meets the drivetrain. Getting this wrong means misaligned brakes, poor shifting, or structural failure.

Our CNC machined titanium dropouts solve the core pain points builders face every day. We eliminate the structural voids common in cast alternatives, resolve soft-thread issues, and ensure perfect side-to-side parallelism.

You get a component that genuinely performs under load — not just one that looks good on paper.

Our facility in Baoji — China's "Titanium Valley" — runs 40+ CNC lathes, machining centers, and gantry systems dedicated to titanium precision parts.

We hold 1,000+ tons of annual production capacity and have worked with 100+ international clients across aerospace, medical, and industrial sectors. This experience directly benefits bicycle component production through process discipline and quality culture.


melting	melting	forging	forging	rolling

Every incoming titanium alloy undergoes spectrometer analysis verifying chemical composition. In-process dimensional checks occur at 5-stage intervals. Ultrasonic testing detects subsurface defects non-destructively.

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.

Surface roughness measurements ensure consistent finish quality. Final inspection includes torque testing and visual examination under magnification. Complete documentation packages accompany each shipment with material certificates.

Mechanical Properties Testing

Inner Diameter Measurement

Ultrasonic Testing

CMM Dimensional

Mounting Hole Diameter Measurement

Quality Management System Certification

· Custom foam inserts to protect precision machined surfaces

· Vacuum-sealed bags with desiccants for moisture control

· Wooden crates for bulk shipments

· Full labeling and documentation for easy tracking

· Air freight available for urgent orders; sea freight for cost-effective bulk delivery

Q: Why choose CNC machining over water-jet cut plate for dropouts?

A：CNC machining enables 3D profiling, weight relief, and integrated features like axle threads and derailleur stops — none of which 2D plate cutting can achieve.

Q: Can these handle the torque of high-power e-bike motors?

A：Yes. The solid billet construction of the product delivers superior shear strength versus cast aluminum, making them reliable for 1000W+ mid-drive systems.

Q: What surface finishes are available?

A：As-machined, bead blasted, brushed, anodized, and PVD coated — or any custom finish specified in your drawings.

Q: Do you support prototype and small-batch orders?

A：Absolutely. We support R&D prototypes, small production runs, and long-term OEM supply programs.

Q: How do you ensure consistent quality across batches?

A：Our multi-stage QC system — including CMM inspection, material traceability, and final documentation — ensures every batch of the product meets your exact specifications.

Contact Us

Ready to source precision-machined titanium dropouts CNC machined built to your specs? Contact our team at sherry@hc-titanium.com — fast response, OEM/ODM welcome.