Door Latches

Solution

Product Description

Door Latches are essential mechanical devices designed to secure doors by engaging with a strike plate or keeper. They feature a movable bolt or lever that locks into a recess, preventing unauthorized access unless activated. Available in different types—such as spring latches (self-closing), deadlatches (anti-pick), and electromagnetic latches—they serve a vital role in residential, commercial, industrial, and automotive applications.

Constructed from high-quality materials like stainless steel, zinc alloy, or brass, door latches ensure durability, security, and smooth operation. Modern models may integrate smart features such as biometric recognition or keyless entry systems, providing both traditional mechanical reliability and advanced access control.

Key Features

1. Corrosion Resistance: Premium door latches utilize 304-grade stainless steel or zinc alloy, with a salt spray test rating exceeding 500 hours (ASTM B117 standard), ensuring durability in harsh environments. The electroplating thickness typically measures 8-12μm for optimal protection.

2. Mechanical Strength: Industrial-grade latches feature a minimum tensile strength of 80,000 PSI (550 MPa) and withstand over 100,000 operational cycles (EN 1906:2012 certification) without performance degradation. The strike plate is reinforced to resist up to 1,200 lbs (544 kg) of forced entry pressure.

3. Precision Engineering: High-tolerance components maintain alignment within ±0.5mm (0.02") throughout the product lifecycle. The latch bolt typically has a throw length of 9.5-12.7mm (⅜"-½") with smooth operation requiring less than 5 lbs (2.27 kg) of actuation force.

4. Thermal Stability: Engineered polymers in the mechanism maintain dimensional stability across -40°F to 250°F (-40°C to 121°C) operating range. Metal components feature a thermal expansion coefficient below 10.8 μm/m·°C (ASTM E228).

5. Security Enhancements: Anti-pick designs incorporate 6-pin tumbler mechanisms (ANSI/BHMA A156.5 Grade 1) with drill-resistant hard plates (Rockwell C50 hardness). Some models include biometric sensors with a false acceptance rate of less than 0.1%.

6. Acoustic Performance: Sound-dampened models reduce operational noise to below 30 dB.

Application Scenarios

• Residential: Used for home doors, garage doors, and storage room doors, providing privacy and security.

• Commercial: Suitable for offices, retail stores, and warehouses, ensuring property safety.

• Automotive: Used in car doors and other moving parts to enhance security.

Precautions

• Installation Alignment: Ensure proper alignment between the latch and strike plate for optimal performance.

• Regular Checks: Periodically inspect the mechanical components of the latch for wear and rust.

• Avoid Moisture: When used in humid environments, choose corrosion-resistant materials for the latch.

Frequently Asked Questions (FAQ)

1.How is the security performance of door latches?
High-quality door latches offer anti-pick and drill-resistant designs to ensure security, with some models integrating biometric technology.

2.What materials are available?
Door latches are typically made from 304-grade stainless steel, zinc alloy, or brass, providing various durability and appearance options.

3.Do I need special tools to install door latches?
Installation usually requires only basic tools, such as screwdrivers and drills, to ensure safe and accurate application.

4.How do door latches maintain long-term performance?
Regular inspection and maintenance, including cleaning and lubrication, can ensure the performance and stability of door latches over the long term.