Door lock body

When sourcing door lock bodies, you must prioritize material durability and mechanical precision. Look for components made of 304 Stainless Steel or Solid Brass to ensure corrosion resistance. Key dimensions such as the Backset (typically 60mm or 70mm) and the Center-to-Center distance (CTC) must match your door preparation. For high-traffic areas, ensure the lock body is rated for Grade 1 or Grade 2 (ANSI/BHMA), which guarantees performance over 500,000 to 1,000,000 cycles.

Compliance is critical for legal entry into regional markets. For the North American market, look for UL 10C (3-hour fire rating) and ANSI/BHMA A156.13 certifications. For the European market, the EN 12209 standard is essential, which classifies locks based on use, durability, and security. If you are sourcing for fire doors, the lock body must have a certified fire-resistant rating to ensure it does not melt or fail under extreme heat.

Evaluate the deadbolt projection length; a minimum of 20mm (1 inch) is recommended for high security. Check for anti-saw pins (hardened steel inserts) inside the bolt to prevent manual cutting. Additionally, for smart lock integration, ensure the lock body features a split-spindle design or specific electronic actuators that are compatible with motor-driven systems. Always request a salt spray test report (minimum 48-72 hours) to verify finish durability against oxidation.

If you are integrating the lock body into a smart system, you must confirm sensor compatibility. This includes door-status monitoring sensors and latch-bolt detection switches. Ensure the internal wiring is protected and that the torque requirements of the lock body do not exceed the capacity of your smart lock motor. Sourcing from Made-in-China.com allows you to find suppliers who offer OEM/ODM customization for specific PCB and motor housing alignments.

To minimize risk, always request a pre-shipment inspection (PSI) by a third-party agency like SGS or Intertek. Focus on dimensional accuracy using calipers, as a 1mm deviation can render a lock body unusable. Use Secure Payment services provided by platforms like Made-in-China.com to ensure funds are only released after the goods pass quality verification and shipping documents are uploaded.

Lock bodies are heavy, so shipping costs significantly impact the unit price. Negotiate for FOB (Free On Board) terms to maintain control over your logistics costs. For initial orders, aim for a tiered MOQ—for example, a small trial air-shipment of 100 units to test market fit, followed by a sea-freight bulk order of 1,000+ units to unlock volume discounts of 15-25%.

Door lock bodies are dense and heavy. Ensure the supplier uses double-walled corrugated export cartons and reinforced plastic strapping. Each unit should be individually boxed with anti-rust paper or silica gel packets to prevent moisture damage during long sea transits. Request that pallets are shrink-wrapped and corner-protected to prevent crushing during stacking in the container.

Verify the HS Code (typically 8301.40) for door locks to calculate accurate import duties in your country. Be aware of anti-dumping duties that may apply to steel products in certain regions. Ensure the supplier provides a Certificate of Origin (CO), which may qualify you for preferential tariff rates under specific Free Trade Agreements (FTAs).