ISO 9001
High-Performance Portfolio
Precision Titanium Fasteners for High-Tolerance Engineering
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ISO 9001
Direct Factory
PVD Coated
Surface Treated
Micro Sizes
Bright Finish
Torx Drive
CNC Custom
Technical Whitepaper
Engineering Grade 5 & Grade 2 Titanium Grub Screws for Bern's High-Tech Sectors
A rigorous metallurgical and mechanical evaluation for procurement engineers in the Canton of Bern, covering micro-turning tolerances, point configurations, and Swiss-standard compliance.
In modern precision mechanical assemblies, the headless socket set screw—commonly designated as a titanium grub screw—serves a non-negotiable role in component retention, axial preload generation, and micro-metric positioning. Unlike headed fasteners (such as DIN 912 or ISO 4018 bolts) that rely on tensile clamping beneath a bearing head, grub screws transmit mechanical force entirely through thread flank engagement and the compressive contact interface at the tip. For the demanding manufacturing sectors across Bern, Biel/Bienne, Thun, and Burgdorf, shifting from conventional 300-series stainless steels (1.4301 / 1.4404) or quenched alloy steels (12.9 grade) to Grade 5 Titanium (Ti-6Al-4V, Werkstoff 3.7165) and Grade 2 Titanium (commercially pure, Werkstoff 3.7035) delivers unparalleled advantages in strength-to-weight ratio, structural fatigue resistance, non-magnetic neutrality, and biological inertness.
Our Baoji manufacturing complex supplies Swiss technical buyers with precision-machined titanium grub screws governed by international dimensional architectures including DIN 913 (ISO 4026, Flat Point), DIN 914 (ISO 4027, Cone Point), DIN 915 (ISO 4028, Dog Point), and DIN 916 (ISO 4029, Cup Point). In applications spanning micro-optical gimbals produced along the Aare river to automated orthopedic surgical drivers in the Bernese Medical Cluster, selecting the precise alloy composition and tip geometry determines joint integrity under cyclic vibrational fatigue and thermal gradients.
| Mechanical & Physical Property | Grade 5 Titanium (Ti-6Al-4V) | Grade 5 ELI (ASTM F136) | Grade 2 Titanium (CP Ti) | Austenitic Steel 1.4404 (316L) |
|---|---|---|---|---|
| Tensile Strength (Rm, MPa min.) | 895 – 1050 | 860 – 960 | 345 – 450 | 500 – 700 |
| Yield Strength (Rp0.2, MPa min.) | 828 | 790 | 275 | 200 |
| Density (g/cm³) | 4.43 | 4.43 | 4.51 | 8.00 |
| Modulus of Elasticity (GPa) | 110 – 114 | 110 – 112 | 103 – 105 | 193 – 200 |
| Vickers Micro-Hardness (HV 0.2) | 310 – 360 | 300 – 340 | 160 – 200 | 150 – 190 |
| Magnetic Permeability (μr) | 1.00005 (Non-Magnetic) | 1.00005 (Non-Magnetic) | 1.00005 (Non-Magnetic) | 1.005 – 1.015 (Cold Worked) |
| Biocompatibility / Medical Certification | ISO 5832-3 / ASTM B348 | ASTM F136 / ISO 5832-3 | ASTM F67 / ISO 5832-2 | ASTM F138 (Surgical Implant) |
Geometry Guide
Point Geometries & Mechanical Selection for Swiss Tooling
Precision-ground point options engineered for exact rotational coupling, shaft alignment, and surface protection across micro-mechanical assemblies.
DIN 913 / ISO 4026 (Flat Point)
Configured with a flat ground terminal face, the DIN 913 titanium grub screw exerts even compressive friction against precision ground shafts without marring or gouging. Essential for frequent position resetting in horological calibration stages, optical lens barrel centering, and thin-walled rotary encoders manufactured throughout the Biel/Bienne district.
DIN 914 / ISO 4027 (Cone Point)
Featuring a sharp 90° or 120° precision point, the cone point bites directly into receiving detents or counter-drilled indentations on mating components. This geometry generates maximum axial security and non-slip locating under torsional impulse, widely specified in Bernese automation fixtures, high-g robotic end effectors, and dynamic weapon optic mounts.
DIN 915 / ISO 4028 (Dog Point)
Machined with a cylindrical extension (full dog or half dog), this geometry slides precisely into internal shaft keyways or annular guide channels. It permits axial motion while prohibiting angular rotation, ideal for micro-actuators in surgical robotics and multi-axis miniature slide rails engineered in the Canton of Bern.
DIN 916 / ISO 4029 (Cup Point)
Engineered with an annular concavity and a sharpened rim, the cup point cuts slightly into the surface of cold-rolled shafts to achieve extreme torque transmission without slippage. Our cold-forged and precision-turned cup rims ensure uniform 360-degree indentation across high-vibration drive pulleys.
Hex Socket & Torx (Star) Micro-Drives
For micro-fasteners down to M0.8 and M1.2, traditional hex sockets can strip under rapid pneumatic assembly. We machine high-precision Torx (T1 to T10) and internal hex broached drives with controlled depth, ensuring maximum cam-out resistance and zero tool head deformation during cleanroom automation.
Nylon-Tipped & Brass-Inserted Grub Screws
To safeguard electro-polished ceramic tubes, carbon-fiber rods, or optical glass spindles, we produce hybrid titanium set screws with vulcanized PEEK, Delrin, or brass tips. This prevents contact galling, electrical conduction, and micro-scratching in ultra-clean optical apparatus.
Regional Integration
Localized Applications in Bern's Industrial Clusters
Connecting Baoji's prime titanium supply chain directly with advanced research hubs and manufacturing facilities throughout Switzerland's capital canton.
MedTech & Biomedical Engineering (sitem-insel & Bern Hub)
The Canton of Bern is globally renowned for medical engineering, anchored by the Swiss Institute for Translational and Entrepreneurial Medicine (sitem-insel) and pioneering orthopedic device developers. In reconstructive spinal fixation rigs, bone plate positioning assemblies, and laparoscopic robotic tool holders, fasteners must exhibit absolute biocompatibility, zero cytotoxic leaching, and complete corrosion resistance under repeated autoclave sterilization cycles.
Our ASTM F136 Grade 5 ELI (Extra Low Interstitial) titanium grub screws undergo passivated acid-etch cleaning to eliminate surface iron contamination. Their non-ferromagnetic characteristic (magnetic susceptibility χ ≈ +3.2 × 10-6 cm³/g) permits uncompromised imaging clarity in 3.0T and 7.0T Magnetic Resonance Imaging (MRI) environments without field distortion or thermal artifacts.
Watchmaking Tooling & Micro-Mechanics (Biel/Bienne & Bernese Jura)
Operating directly along the linguistic boundary of the Canton of Bern, Biel/Bienne represents the historical and technological epicenter of Swiss horology. The manufacture of master jigs, CNC holding chucks, micro-escapement test platforms, and movement calibration gauges demands screws that neither distort under micro-torques nor introduce residual magnetic fields that alter hairspring oscillation rates.
We supply micro-diameter titanium set screws ranging from M1.0, M1.2, M1.4, to M2.0 with rolled thread profiles conforming strictly to ISO 965-1 Class 4h/6h standards. Thread flank surface roughness is maintained at Ra ≤ 0.2 μm, enabling silky-smooth rotation inside high-precision brass, titanium, and nickel-silver watch movement plates.
Defense, Aerospace & Photonics (Thun & Bernese Oberland)
Thun and the surrounding Bernese Oberland region accommodate high-reliability defense contractors, military technology centers (such as RUAG), and optoelectronic laboratories. In laser guidance assemblies, ruggedized gimbal heads, and lightweight UAV target identification optics, components face extreme vibration spectra (-40°C to +85°C thermal swings) and corrosive ambient moisture.
By deploying Grade 5 (Ti-6Al-4V) grub screws, engineers eliminate galvanic coupling risks when securing titanium optics housings, while simultaneously reducing rotational inertia on multi-axis tracking gimbals. Our proprietary vacuum PVD diamond-like carbon (DLC) and micro-arc oxidation treatments guard against thread galling during rapid tactical maintenance.
Manufacturing Excellence
Advanced Metrology & Quality Control from Baoji to Bern
How Yevzo's 100+ multi-axis CNC machines and in-house inspection laboratory guarantee zero-defect delivery for Swiss procurement specialists.
Multi-Axis Swiss Lathes
Utilizing Citizen and Star Swiss-type sliding headstock lathes, our Baoji facility turns, threads, and broaches micro grub screws in a single uninterrupted clamping setup. This guarantees absolute concentricity (≤ 0.005 mm TIR) between the socket drive, external thread pitch diameter, and the contact point.
Precision Thread Rolling
Rather than cutting external threads which severs the alloy's crystalline grain lines, we utilize high-precision cylindrical die thread rolling on titanium billets. This induces localized compressive residual stress along the thread root, enhancing shear endurance and preventing fatigue rupture by up to 300%.
EN 10204 3.1 Traceability
Every order ships complete with original Mill Test Certificates documenting chemical spectroscopy (ICP-AES) and mechanical tensile testing. Melt origins trace directly back to vacuum arc remelted (VAR) ingots produced under rigorous aerospace specifications.
Market Dynamics
Emerging Trends in Bern's Fastening & Assembly Landscape
Key procurement shifts driving adoption of titanium set screws among mechanical engineering leaders across Espace Mittelland.
1. Sub-Millimeter Miniaturization
Driven by micro-endoscopy cameras, wearable health diagnostic monitors, and horological balance wheels, Bernese engineers are transitioning from standard M3 fasteners down to sub-miniature M0.8, M1.0, and M1.2 set screws. This necessitates extraordinary thread cleanliness and burr-free microscopic inspection under 50x magnification.
2. Surface PVD & Anodizing Type II
Titanium-to-titanium or titanium-to-aluminum joints can suffer from galling (cold welding) under intense contact friction. Bernese manufacturers increasingly request AMS 2488 Type II alkaline anodizing or TiCN / DLC PVD thin-film coatings, which drastically reduce the friction coefficient (μ down to 0.10) without changing thread pitch classes.
3. Direct-from-Factory Swiss Supply Chains
Procurement teams across Switzerland are streamlining vendor layers to counteract regional inflation. By purchasing directly from primary manufacturing facilities located in Baoji Titanium Valley, Bernese machine builders reduce component acquisition costs by 35%–50% while preserving rigorous quality audits and custom drawing adaptation.
Procurement Clarity
Frequently Asked Questions for Bernese Technical Buyers
Answers to critical questions regarding Swiss customs clearance, material compliance, logistics, and galling prevention.
What are the Swiss import tariffs and customs procedures for titanium screws delivered to Canton of Bern?
Titanium grub screws exported to Switzerland are classified under Harmonized System (HS) Code 8108.90 (Titanium and articles thereof) or 7318.15. Effective January 1, 2024, Switzerland abolished industrial customs tariffs on most manufactured items. Consignees in Bern (whether in Biel, Thun, or Bern-Mittelland) are subject only to the standard Swiss Value Added Tax (VAT / MWST of 8.1%). We routinely manage shipments under DDP (Delivered Duty Paid) via express couriers (DHL, FedEx, UPS), ensuring parts clear Swiss customs directly at Zurich (ZRH) or Basel-Mulhouse (BSL) with zero administrative delays.
How do Yevzo engineers prevent thread galling when titanium grub screws are installed into aluminum or stainless components?
Galling occurs when friction removes the naturally occurring passive titanium oxide (TiO2) film, causing micro-welding between metal flanks. For applications across Bern, we provide three engineering solutions: (1) Applying an AMS 2488 Type II anti-galling conversion coating; (2) Applying vacuum PVD Diamond-Like Carbon (DLC) or MoS2 solid lubricant; and (3) Supplying torque-tightening charts advising molybdenum disulfide-based or medical-grade anti-seize paste during factory cleanroom assembly.
What quality documentation is included for Swiss medical device audits (ISO 13485 / MDR)?
For biomedical clients operating near sitem-insel and across the Swiss MedTech belt, we furnish EN 10204 Type 3.1 Inspection Certificates containing heat-specific chemical analysis (C, O, N, H, Fe, Al, V balance Ti) and mechanical tensile data. In addition, we supply Full Dimensional Inspection Reports (Mitutoyo optical profile projector and CMM data), RoHS 3 (Directive 2015/863/EU) certificates, and REACH compliance declarations.
What is the standard production and shipping lead time to the Canton of Bern?
For standard catalogue items in Grade 5 and Grade 2 (DIN 913, 914, 915, 916 in sizes M2 to M12), ready stock can be dispatched within 48 to 72 hours. Custom-dimension screws machined to proprietary Swiss engineering drawings (including micro sizes M0.8–M1.6, special tip radiuses, or Torx drives) typically require 12 to 18 business days for CNC batch production. Air express delivery to Bern addresses takes 4 to 6 business days.
What are the Minimum Order Quantities (MOQ) for custom-machined titanium grub screws?
We support prototype and R&D phases common among Bernese technical universities and start-ups. Prototype evaluation batches for custom drawing-based grub screws start as low as 50 to 100 pieces. For serial production and recurring blanket orders, MOQ scales up to 1,000–50,000 units with structured tiered pricing and scheduled consignment releases.
Why Yevzo
Baoji Manufacturing Direct to the Swiss Industrial Sector
Combining the vast raw-material ecosystem of China's Titanium Valley with the uncompromising tolerance standards required by Swiss industry.
Direct Mill Integration Since 2013
Headquartered in the High-Tech Development Zone of Baoji, Shaanxi—widely acknowledged as the global hub of titanium raw metal refining—Yevzo Titanium Metal Co., Ltd. controls every phase of value transformation. From ASTM B348-certified titanium ingot selection and billet extrusion to five-axis CNC turning, centerless micro-grinding, thread forming, and ultrasonic cleaning, zero intermediary markup stands between our production floor and your Bern facility.
With an operational footprint encompassing over 100 high-precision CNC machine centers and cold-heading headers, our technical team works in close collaboration with your drafting office. We welcome 2D drawings (PDF, DWG) and 3D CAD models (STEP, IGES) for comprehensive manufacturing feasibility analysis and rapid prototyping.
Request a Technical Proposal & Machining Quote for Bern
Accelerate your precision project with certified Grade 5 & Grade 2 titanium grub screws. Submit your DIN standard, custom blueprint, thread pitch, and target volume to connect directly with our chief fastener engineers.