How do you prevent thread galling (cold-welding) during titanium bolt installation?
Titanium naturally forms an adhesive micro-welding bond when rotated dry against internal threads under heavy clamp friction. To completely prevent galling, our fasteners feature precision mirror-rolled threads (Ra < 0.4μm) with uniform lead-in chamfers. We mandate using a quality synthetic anti-seize paste containing copper, nickel, or PTFE during installation. Additionally, our PVD-coated finishes (such as DLC or Titanium Nitride) create an ultra-hard ceramic surface that eliminates direct metal-to-metal bonding.
What torque conversion factor should be used when replacing steel bolts with titanium?
Because Grade 5 Ti-6Al-4V has a modulus of elasticity of roughly 114 GPa (roughly half of carbon steel's 210 GPa), titanium bolts stretch slightly more under tension, generating excellent clamp preload security. When using anti-seize lubricant, torquing titanium to 85% to 90% of the steel OEM specification delivers identical clamping tension without over-stretching the fastener. We provide engineering torque guidance charts with every custom OEM batch.
Do your Grade 5 titanium bolts come with certified metallurgical test reports?
Yes. Every production run is traced back to the original vacuum-arc remelted (VAR) titanium ingot from our Baoji mill. We provide standard EN 10204 3.1 Inspection Certificates specifying exact chemical compositions (Aluminum 5.5–6.75%, Vanadium 3.5–4.5%, Iron ≤ 0.40%, Oxygen ≤ 0.20%) and destructive mechanical testing results covering tensile yield strength, elongation percentage, and Rockwell hardness (HRC 32–38).
What is the minimum order quantity (MOQ) for custom bicycle fastener drawings?
For standard catalog sizes kept in stock (such as standard M5x16 stem bolts, M5x18 bottle cage screws, and M6 rotor bolts), our MOQ starts as low as 10 to 20 pieces. For custom OEM designs requiring custom head geometries, unique lengths, non-standard thread pitches, or bespoke laser markings, our baseline production run typically begins around 50 to 100 pieces per specification.
What surface finishes and custom colors can you achieve on titanium bicycle parts?
We provide four distinct surface engineering processes: 1) High-gloss mechanical hand-polishing and vibratory tumbling; 2) Controlled multi-voltage electrochemical anodizing producing gold, royal blue, electric violet, purple, bronze, and burnt-blue heat-gradient effects; 3) Physical Vapor Deposition (PVD) vacuum coating producing hard Titanium Gold, Neo-Chrome Oil Slick Rainbow, and deep DLC Black; 4) Fine matte bead-blasted raw titanium finishes.
Can your titanium fasteners withstand aggressive salt and winter road slush?
Completely. Titanium does not rust or pit in saline environments. In standard ASTM B117 neutral salt spray laboratory testing, our Grade 5 titanium bolts withstand over 1,000+ continuous hours with zero oxide formation, pitting, or surface discoloration. They are impervious to sweat dripping onto stem bolts during indoor trainer sessions, coastal sea spray, and magnesium chloride winter de-icing salts.
What thread standards and tolerances do you support for international bicycle assemblies?
We produce standard metric coarse threads (M2 to M26), fine pitches (M8x1.0, M10x1.0, M10x1.25, M12x1.25, M14x1.5), as well as American UNC and UNF imperial threads. All external bolt threads are verified to ISO 965-2 Class 6g standards, and all internal nut threads are tapped to Class 6H precision, ensuring zero sloppiness or cross-threading when interfacing with Shimano, SRAM, or Campagnolo components.
What payment methods, lead times, and global shipping terms do you offer?
We accept T/T wire transfers, Letters of Credit (L/C), and PayPal for sample orders. Stock products ship within 48 to 72 hours. Custom CNC and thread-rolled OEM production orders typically require 15 to 22 business days depending on surface finishing requirements. We offer FOB, CIF, DDU, and DDP air-express door-to-door delivery via DHL, FedEx, and UPS to destinations worldwide.