BOZE CNC Ti | Machining

Swiss-type turning of spindles/pins

Swiss-type turning of spindles/pins capability for titanium components

Grade 1, Grade 2, Grade 5 (Ti-6Al-4V), Grade 7, Grade 9, Grade 23 Common Grades

Ø0.5 mm – Ø32 mm bar stock; up to 200 mm length Thickness Range

±0.005 mm (diameter) / ±0.01 mm (length) Cutting Tolerance

±0.005 mm (diameter) / ±0.01 mm (length) Tolerance

Ra 0.2–0.8 µm as-turned Surface Finish

Titanium Bottom Bracket Spindle Titanium Cassette Cog Titanium Chainring Bolt Titanium Chainring Titanium Derailleur Limit Screw Titanium Derailleur Pulley

What is Swiss-type turning of spindles/pins?

Swiss-type turning of spindles/pins capability for titanium components

Precision machining capability for Swiss-type turning of spindles/pins, utilizing multi-axis CNC centers with in-process inspection and SPC quality control.

Engineering Parameters & Capabilities

Swiss-type automatic lathes use a sliding headstock and fixed guide bushing to machine slender titanium components. The guide bushing supports the bar stock immediately behind the cutting tool, eliminating deflection for high length-to-diameter ratios, specifically for pins. Precision pins for fasteners and medical applications present unique challenges: cylindrical OD tolerance ±0.005 mm with chamfer/radius control. Tight straightness (< 0.02 mm over 50 mm) is required for press-fit applications.

Parameter	Primary Method	Alternative Method
Bar Support	Guide bushing supports stock at tool contact point	Chuck-only — no bushing
L:D Ratio	Up to 20:1 without chatter	< 4:1 typical
Cycle Time	Single op — mill, drill, turn simultaneously	Multiple ops, longer cycle

Engineering Capabilities & Limits

Precision machining capability for Swiss-type turning of spindles/pins, utilizing multi-axis CNC centers with in-process inspection and SPC quality control.

Hole Types Supported

Cross-drilled holes Eccentric bores Threaded holes (internal/external) Hexagonal/star drives

Heat Control Measures

Synchronized guide bushing with high-pressure oil coolant. Tool engagement is distributed across multiple axes simultaneously, spreading the thermal load.

Flatness & Stress Relief

Guide bushing support eliminates deflection for L:D ratios up to 20:1. Straightness within 0.005 mm over a 100 mm length.

Tolerance

±0.005 mm (diameter) / ±0.01 mm (length)

Typical Applications & Components

This process is used to manufacture the following titanium components.

Secondary Operations & Downstream Processing

Enhance your component with our integrated downstream services:

Thread Rolling

Cold-forming of threads for superior fatigue performance.

Centerless Grinding

OD grinding achieves precision diameters within ±0.002 mm.

Chamfering

Chamfering for Swiss-type turning of spindle and pin components.

Quality Assurance & Inspection

Inspection Items

Swiss-type turning of spindles/pins specific dimensional verification (CMM / vision)
Material grade verification (PMI / OES spectrometer)
Biocompatibility validation per ISO 10993

Quality Standards & Certifications

ISO 9001:2015 — Quality Management System
AS9100D — Aerospace Quality Management
ASTM B265 — Titanium Strip, Sheet, and Plate Standard
ISO 13485 — Medical Device Quality Management

Frequently Asked Questions

What titanium grades are suitable for Swiss-type turning of spindles/pins?

Swiss-type turning of spindles/pins can be performed on Grade 1, Grade 2, Grade 5 (Ti-6Al-4V), Grade 7, and other grades. The specific grade selection depends on the required mechanical properties, corrosion resistance, and end-use application requirements.

What tolerances can be achieved with Swiss-type turning of spindles/pins?

Typical achievable tolerances for Swiss-type turning of spindles/pins are ±0.005 mm (diameter) / ±0.01 mm (length). Tighter tolerances may be possible depending on part geometry, material condition, and quantity. Our engineering team reviews each project to determine the optimal tolerance-cost balance.

What quality certifications apply to Swiss-type turning of spindles/pins?

All Swiss-type turning of spindles/pins operations are performed under ISO 9001:2015 — Quality Management System, AS9100D — Aerospace Quality Management, ASTM B265 — Titanium Strip, Sheet, and Plate Standard certified quality management systems. Full traceability documentation, material certifications (EN 10204 3.1), and inspection reports are provided with each shipment.

What is the typical lead time for Swiss-type turning of spindles/pins projects?

Lead times for Swiss-type turning of spindles/pins vary by complexity and quantity. Prototype quantities (1-10 units) can typically be completed in 3-7 business days. Production quantities require 15-25 business days. Rush orders are available for qualifying projects. Contact our sales team for a specific timeline.

Can you provide DFM feedback for my Swiss-type turning of spindles/pins design?

Yes. We provide free Design for Manufacturability (DFM) analysis for all new projects. Simply upload your CAD file (STEP, DXF, or DWG format) and our engineering team will review your design and provide optimization suggestions within 24 hours.

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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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