High-Performance Titanium Fasteners & Components
Directly machined from certified Ti-6Al-4V aerospace-grade and medical-grade stock at Velnora Titanium in Baoji Titanium Valley. Fully interchangeable with European metric standards.
Technical Whitepaper: Precision Titanium Grub Screws (Set Screws) for Malmö High-Tech OEM Sectors
In high-precision mechanical assemblies, the headless set screw (grub screw) is an indispensable locking and indexing element. Unlike conventional structural bolts, titanium grub screws transmit shear torque along the axis to clamp rotating shafts, gears, pulleys, and optical alignments in tight spaces without head interference. For technical engineering teams across Malmö, Lund, and the wider Skåne industrial corridor, material selection has pivoted decisively toward Grade 5 (Ti-6Al-4V TC4) and Grade 2 Commercially Pure (CP) titanium.
Velnora Titanium Industry Co., Ltd., based in Baoji—known globally as China's Titanium Valley—delivers ultra-precise set screws complying rigorously with DIN 913, DIN 914, DIN 915, and DIN 916 standards, alongside custom ISO and JIS micro-screws. Through multi-axis Swiss-type sliding headstock lathes and roll-threading technology, we eliminate surface micro-cracks and guarantee concentricity within ±0.005 mm.
| Standard & Geometry | Point Profile | Drive System | Primary Mechanical Function | Recommended Skåne Industry Application |
|---|---|---|---|---|
| DIN 913 / ISO 4026 | Flat Point (Chamfered) | Hexagon Socket / Torx | Non-destructive clamping on ground shafts and delicate sub-assemblies | Laboratory automation, Medicon Valley medical optics, robotic encoders |
| DIN 914 / ISO 4027 | Cone Point (90° or 120°) | Hexagon Socket | Permanent penetrating fixation into hardened detents or grooved shafts | Wind turbine pitch control linkage, maritime winches, heavy defense chassis |
| DIN 915 / ISO 4028 | Dog Point (Full / Half) | Hexagon Socket | Acts as an internal locating dowel pin within keyways or hollow tubes | Linear drive ball screws, servo actuator shafts, marine sensor housings |
| DIN 916 / ISO 4029 | Cup Point (Serrated Edge) | Hexagon Socket / Spline | Maximum dynamic torsional resistance against rotational slip under vibration | High-speed centrifugal pumps, marine propulsion shafts, electric kart drivetrains |
Every grub screw manufactured by Velnora is subjected to strict thread gauging using calibrated 6g/4h Go/No-Go thread gauges. Micro-sizes starting from M2, M2.5, and M3 up to heavy-duty M16 and M20 dimensions are machined from vacuum-arc remelted (VAR) titanium bars, ensuring complete metallurgical homogeneity with zero internal voids.
Engineering Application Scenarios in Malmö & The Öresund Region
How Swedish industrial design and Southern Sweden's engineering pioneers leverage Velnora’s high-precision titanium grub screws across coastal, clean-tech, and high-frequency dynamic environments.
Västra Hamnen Maritime & Offshore Tech
Malmö’s Western Harbour (Västra Hamnen), once defined by the historic Kockums shipyard, has transformed into a world hub for offshore oceanography, subsea inspection UAVs, and clean maritime transport. Our Grade 5 DIN 916 grub screws are deployed in saline propulsion propellers, sensor telemetry brackets, and mooring instrumentation, resisting 100% of Baltic Sea chloride galvanic pitting.
Medicon Valley Biomedical Instruments
Situated within the Greater Copenhagen-Malmö Medicon Valley cluster, analytical medical hardware requires non-ferromagnetic, biocompatible fastening solutions. Velnora supplies Grade 2 and Grade 5 DIN 913 flat-point set screws for MRI-adjacent micro-fluidic pumps, dialysis flow-meters, and laser surgery articulated arms where zero magnetic deflection is strictly mandated.
Advanced Cleantech & Food Automation
Skåne is Sweden’s heartland for agricultural technology and food processing innovation. Titanium grub screws (DIN 914 / 915) replace 316L stainless screws inside harsh cleaning CIP (Clean-In-Place) environments where caustic washdowns, organic acids, and steam sterilizers cause thread seizure and catastrophic line downtime in food packaging machinery.
Urban Micro-Mobility & High-End Bicycles
As Scandinavia's premier cycling city, Malmö's cargo bike manufacturers, bespoke frame builders, and e-bike mobility startups utilize our ultra-lightweight M5 and M6 titanium grub screws for dropper post pivots, derailleur limit stops, and stem lockrings, cutting unsprung grams and avoiding winter salt-slush corrosion on Swedish roads.
Market Development Trends: The Swedish Shift Toward High-Performance Circular Fasteners
Swedish manufacturing procurement protocols have undergone substantial realignment over the past five years. Driven by the national target for fossil-free industrial output and the strict carbon accountability metrics enforced across Skåne County, machine builders are moving away from the "disposable maintenance" model. In past decades, zinc-plated carbon steel grub screws were discarded during scheduled maintenance after seizing inside tapped aluminum housings due to galvanic corrosion. Today, the total lifecycle cost (LCC) calculation dominates technical purchasing decisions in Malmö.
1. Decarbonization and Lightweighting in Electric Transport: The rapid electrification of heavy haulage (Volvo, Scania supply chains) and electric maritime vessels operating across the Sound demands substantial mass reduction. Grade 5 titanium offers a specific strength-to-density ratio (202 kN·m/kg) that dwarfs steel (63 kN·m/kg). Shaving grams at rotating interfaces translates directly into reduced battery wear and lower watt-hour consumption per nautical mile or kilometer.
2. The EU CBAM and REACH Environmental Directives: As the European Union Carbon Border Adjustment Mechanism (CBAM) phase-in accelerates, Malmö importers demand audited carbon accounting and full SVHC (Substances of Very High Concern) exclusion under REACH. Velnora Titanium certifies 100% compliance: our raw ingots originate from modern eco-certified vacuum arc furnaces, free of hexavalent chromium, lead, or prohibited conflict minerals.
3. Micro-Mechanics and Additive Integration: With Lund University and MAX IV Laboratory anchoring European synchrotron and high-tech instrumentation nearby, rapid prototyping via metal 3D printing (SLM / DMLS in Ti-6Al-4V) is surging. Direct metal printed housings require precision thread chasers and matching titanium grub screws to eliminate differential thermal expansion (CTE mismatch) during high-temperature cycling.
Metallurgical Engineering: Controlling Cold Welding (Galling) in Malmö Assemblies
A frequent concern voiced by Swedish mechanical design engineers is the phenomenon of thread galling (adhesive wear) when titanium set screws interface with internal threads made from matching titanium, 316 stainless steel, or 7075-T6 aluminum. Titanium forms an instant, protective titanium dioxide (TiO2) passive layer. However, under high torque clamping pressures without lubrication, this oxide film can shear off, causing localized micro-welding between asperities.
To safeguard Malmö assembly lines against downtime, Velnora Titanium deploys three proprietary factory surface engineering treatments:
Precision Micro-Arc Anodizing
Our computer-controlled electrolytic anodizing modifies the passive oxide barrier into a dense, wear-resistant rutile crystal structure (up to 120V calibration), doubling surface lubricity without altering thread pitch dimensions.
PVD Ceramic & DLC Coatings
For high-frequency adjustment grub screws, physical vapor deposition applies a nanometer-thin layer of Diamond-Like Carbon (DLC) or TiN, bringing surface micro-hardness to over 2200 HV while lowering friction coefficients to < 0.12.
Roll-Formed Thread Compaction
Instead of single-point CNC thread cutting, Velnora utilizes precision thread rolling dies. Cold work-hardening aligns the continuous grain flow of the Ti-6Al-4V bar, yielding mirror-smooth root fillets and superior thread fatigue limits.
Why Malmö Procurement Officers Partner with Velnora Titanium
Direct from Baoji Precision Manufacturing Park to Southern Sweden: direct-to-mill pricing, comprehensive third-party testing, and unmatched Scandinavian trade transparency.
Heart of China's Titanium Valley
Founded in 2013 in Jinhe Industrial Park, Baoji, Shaanxi. Direct access to 80% of China’s raw sponge titanium reserves ensures zero supply chain bottlenecks and full traceability down to the raw melt heat lot.
Digital Inspection & Video Verifications
With over 938 publicly cataloged production videos, buyers witness actual CNC turning, thread rolling, and Go/No-Go pin gauge testing before batches are packaged for air or sea dispatch.
ISO, DIN, ANSI & JIS Compliance
Full spectrum production capabilities covering metric (M2–M36) and imperial threads (#2-56 to 1"). Complete EN 10204 3.1 chemical and mechanical inspection mill test certificates issued with every batch.
Rapid Malmö Logistics Window
Quotes delivered within 4 working hours. Express door-to-door air freight via DHL/FedEx to Malmö Airport (MMX) or Copenhagen Kastrup (CPH) in 4–6 business days with DDP clearance support.
Frequently Asked Questions: Malmö B2B Procurement
Targeted technical and commercial answers addressing customs, metallurgy, torque limits, and compliance for Swedish enterprise buyers.
What are the exact mechanical differences between DIN 913, 914, 915, and 916 in Titanium Grade 5?
All four DIN specifications share standard hex-socket drives and outer thread pitches, but differ fundamentally in tip geometry. DIN 913 features a flat chamfered point, perfect for positioning components on ground shafts without marring the parent material. DIN 914 uses a sharp conical point designed to penetrate into softer mating alloys or pre-drilled dimples, creating a permanent axial stop. DIN 915 integrates a cylindrical dog point that drops cleanly into internal keyways or retaining slots to restrict linear travel while permitting rotation. DIN 916 incorporates a cupped ring point with sharp perimeter edges, biting into rotating shafts to deliver maximum resistance against torque slippage in heavy vibration applications.
Can Grade 5 titanium set screws be tightened to the same torque values as 10.9 or 12.9 high-tensile steel?
No. Grade 5 Ti-6Al-4V exhibits a minimum yield strength of 828 MPa and an ultimate tensile strength of ≈ 895–950 MPa, making it equivalent to metric property class 8.8 steel, but with half the modulus of elasticity (114 GPa for Ti vs 210 GPa for steel). You must adjust your assembly torque specs downward to avoid exceeding the elastic limit of the hex socket recess, especially in small sizes like M3 or M4. We recommend utilizing anti-seize paste (such as nickel-based or MoS2 lubricants) and applying calibrated torque wrenches set to our engineered torque tables.
How does Velnora ensure compliance with Swedish customs (Tullverket) and EU import regulations?
Every consignment destined for Sweden includes complete documentation: Commercial Invoice with precise HS Codes (typically 8108.90 for titanium articles / fasteners), Packing List with lot numbers, Certificate of Origin (COO), and Mill Test Certificates to EN 10204 3.1. We accommodate DAP (Delivered at Place) or DDP (Delivered Duty Paid) arrangements where Swedish import VAT and customs tariffs are handled upstream, ensuring zero hold-ups at Malmö freight terminals.
What is the minimum order quantity (MOQ) for custom-dimensioned titanium grub screws?
For standard DIN 913, 914, 915, and 916 screws in stock sizes (M3 to M10), our minimum order quantity starts as low as 50 to 100 pieces for test validation. For non-standard custom thread pitches (e.g., UNEF, micro-sizes M1.6/M2, or special dog lengths machined to customer CAD drawings), our standard setup MOQ is typically 200–500 pieces, depending on the complexity of Swiss-lathe programming.
Will a titanium grub screw provoke galvanic corrosion when inserted into a 6061 or 7075 aluminum block?
Titanium is electrochemically noble (+0.05V vs SCE) compared to active aluminum (-0.75V). In dry interior conditions, no reaction occurs. However, in outdoor marine environments like Malmö Harbour where an electrolyte (saltwater mist) bridges the joint, galvanic acceleration can cause the aluminum thread flanks to corrode over time. We solve this by applying our dense barrier anodizing or PVD coatings onto the titanium screws, combined with an anti-corrosion paste or anaerobic thread locker (e.g., Loctite 243) during assembly to break physical electrolyte continuity.
Accelerate Your Malmö Engineering Project Today
Send our senior engineering team in Baoji your 2D/3D CAD models (STEP, IGES, PDF) or standard DIN/ISO specifications. Receive a comprehensive quotation, tolerance evaluation, and production schedule within 4 hours.