BOZE CNC Ti | Fastener Manufacturing

Caseback threading

Caseback threading capability for titanium components

Grade 1, Grade 2, Grade 5 (Ti-6Al-4V), Grade 7, Grade 9, Grade 23 Common Grades
M2 – M24 thread diameters Thickness Range
+0.01 mm (case diameter) / +0.005 mm (crystal seat) Cutting Tolerance
+0.01 mm (case diameter) / +0.005 mm (crystal seat) Tolerance
Ra 0.1 µm (mirror polish) Surface Finish
Titanium Dive Watch Case Titanium Smartwatch Bezel

What is Caseback threading?

Caseback threading capability for titanium components

Fastener manufacturing capability for Caseback threading, with cold forming, thread rolling, and 100% dimensional inspection.

Engineering Parameters & Capabilities

Thread rolling cold-forms threads by displacing material between two reciprocating or rotary dies, rather than cutting it away. Compressive residual stress at the thread root increases fatigue strength by 30–50% compared to cut threads, specifically for watch case. Precision watch case for Watchmaking, Consumer present unique challenges: Cosmetic surface finish (mirror polish, brush, or bead blast) with sub-mm feature detail. Material traceability from mill to finished case.

Parameter Primary Method Alternative Method
Method Cold-forming: material displaced, not removed Thread cutting / milling
Fatigue Strength 30–50% higher than cut threads Standard (notch-sensitive)
Surface Finish Ra 0.4–0.8 µm; work-hardened Ra 1.6–3.2 µm

Engineering Capabilities & Limits

Fastener manufacturing capability for Caseback threading, with cold forming, thread rolling, and 100% dimensional inspection.

Hole Types Supported

UN/UNF/Metric threads per ASME B1.1 Custom thread forms

Heat Control Measures

Minimal heat generation due to fine finishing passes. Air blast for chip clearing sufficient; coolant not required for cosmetic finishing passes.

Flatness & Stress Relief

Head flatness and perpendicularity within 0.05 mm per fastener standards. Die alignment verified with optical setup microscope.

Tolerance

+0.01 mm (case diameter) / +0.005 mm (crystal seat)

Typical Applications & Components

This process is used to manufacture the following titanium components.

Titanium Dive Watch Case

Grade 5 Ti-6Al-4V Consumer Electronics

Titanium Smartwatch Bezel

Grade 5 Ti-6Al-4V Consumer Electronics

Secondary Operations & Downstream Processing

Enhance your component with our integrated downstream services:

Thread Inspection

Go/no-go gauge inspection per ASME B1.1.

Proof Load Testing

Tensile proof load per ASTM F606.

CNC Engraving (Logo/Text)

CNC Engraving (Logo/Text) for caseback threading components.

PVD Coating

PVD Coating for caseback threading components.

Water Resistance Testing

Water Resistance Testing for caseback threading components.

Quality Assurance & Inspection

Inspection Items

  • Caseback threading specific dimensional verification (CMM / vision)
  • Material grade verification (PMI / OES spectrometer)

Quality Standards & Certifications

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

Frequently Asked Questions

What titanium grades are suitable for Caseback threading?
Caseback threading 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 Caseback threading?
Typical achievable tolerances for Caseback threading are +0.01 mm (case diameter) / +0.005 mm (crystal seat). 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 Caseback threading?
All Caseback threading 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 Caseback threading projects?
Lead times for Caseback threading 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 Caseback threading 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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