Stainless Steel Cross-Head Screws M8, Sliding Door Accessories, High-End Furniture Hardware

Sliding Door Lock Points: Design and Application Features

I. Core Design Points of Lock Points

1. Lock Point Types and Structure

Single-Point Lock

• Structure: Single bolt/hook, locked only in the middle of the door sash, driven by the handle.
• Design Features: Simple structure, low cost, easy installation; concentrated locking force, weak prying resistance, average sealing performance.
• Material: Zinc alloy, ordinary steel, surface treated by electroplating or spraying for rust prevention.

Multi-Point Lock (2/3/4 Points or More)

• Structure: Linked multi-point locks on the top/bottom/side (sky-ground hooks, side hooks, bolts), synchronized locking when the handle rotates.
• Design Features: Multi-point stress, strong prying/wind pressure resistance; compressing weatherstripping to improve sealing and sound insulation; reducing door sash deformation.
• Common Forms:
  • Two-Point Lock: One lock point at the top and bottom, suitable for medium-sized doors.
  • Three-Point / Four-Point Lock: Multi-points at top/middle/bottom or sides, for heavy-duty / high-security scenarios.
  • Hook Lock / Bolt Lock: Hook lock has deep engagement and strong prying resistance; bolt lock is suitable for heavy-duty lift-sliding doors.
   

2. Key Design Parameters

Lock Point Materials

• Zinc Alloy: Moderate cost, sufficient strength, suitable for indoor / general scenarios.
• Stainless Steel (304/316): Corrosion-resistant, weather-resistant, high strength, preferred for outdoor / high-humidity / industrial scenarios.
• Precision Cast Steel: For heavy-duty doors / high-security scenarios, with stronger locking force.

Lock Point Adjustment Function

• Adjustable Lock Points: Thread / eccentric structure, fine-tune the extension of lock points to compensate for installation errors and door sash deformation, ensuring tight locking.
• Strike Plate Design: With adjustment slots, matching lock points for precise engagement.

Transmission and Linkage Design

• Transmission Rod: Stainless steel / galvanized steel, ensuring synchronous multi-point operation without jamming.
• Buffer Mechanism: Reduces handle rebound, silent opening and closing, improved hand feel.
• Anti-Mis-Locking: Can only be locked after the door sash is closed, preventing lock hooks from hitting the door frame.

Concealed Design

• Lock points / strike plates are built into the profile slots without exposed protrusions, anti-scratch, more aesthetic and safer.

II. Application Features and Scenario Adaptation

1. Application of Single-Point Locks

• Applicable Scenarios: Indoor light sliding doors (wardrobes, studies, partitions), ordinary balcony doors, projects with limited budget.
• Advantages: Simple operation, low cost, fast installation, convenient maintenance.
• Limitations: Weak anti-theft performance, average sealing, not suitable for large-size / heavy-duty doors.

2. Application of Multi-Point Locks

Applicable Scenarios

• Residential: Heavy-duty balcony sliding doors, floor-to-ceiling windows, entry sliding doors, villa exterior doors.
• Commercial: Shops, office buildings, hotel lobby sliding doors.
• Industrial: Factory, warehouse, equipment room protective sliding doors.
• Special: High-altitude / strong wind areas, coastal high-humidity areas, areas with high security requirements.

Core Advantages

• High Security: Multi-point engagement, strong resistance to prying / forced entry.
• High Sealing: Multi-point compression of weatherstripping, improving airtightness / watertightness / sound insulation / thermal insulation.
• Deformation Resistance: Distributed stress, reducing warping, sagging and misalignment of door sashes.
• Durability: Uniform stress, reduced hardware wear, extended service life.

3. Adaptation for Different Sliding Door Types

• Ordinary Sliding Doors: Single-point / two-point locks, meeting basic security and sealing requirements.
• Lift-Sliding Doors: Must be equipped with multi-point locks (≥3 points). With the lifting mechanism, the door sash lowers to compress the weatherstripping when locked, providing optimal sealing and wind pressure resistance.
• Heavy-Duty Sliding Doors (≥100kg): Four-point / multi-point hook locks + sky-ground bolts, ensuring load-bearing capacity and security.
• Industrial / Protective Sliding Doors: Stainless steel multi-point locks, anti-theft buckles, double-sided operation, adapted to harsh environments.

III. Selection and Design Considerations

• Selection by Door Weight and Size: Single-point / two-point for ≤80kg; three-point or more for ≥80kg; four-point / sky-ground locks for heavy-duty doors.
• Selection by Scenario Security Level: Single-point for indoor / partitions; multi-point for balconies / exterior doors / commercial use; multi-point hook locks / bolt locks for security / industrial use.
• Material and Environment Matching: Zinc alloy for indoor use; 304/316 stainless steel for outdoor / coastal / high-humidity environments; precision cast steel for industrial use.
• Adjustment and Installation: Prioritize adjustable lock points for easy installation, commissioning and later maintenance.
• System Compatibility: Lock points, transmission, handle and strike plates must match the same system to ensure smooth linkage.

We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs.

Our maximum processing outer diameter is 60, and the minimum control tolerance is 0.001. We have Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment, which can effectively provide customers with the best technical solutions.

Our company has a total of 300 employees, including 20 technicians, 10 engineers, and 15 quality control personnel. We have over 300 pieces of equipment.

Our company implements 8S management and has passed ISO9001 and TS16949 automotive certifications.

Our customers include Siemens, bo-sch, Foxconn, Panasonic Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Cater-pillar.