CL226-3A (M5 Embedded Stud) & CL226-3 (Countersunk Hole) 40×40mm Zinc Alloy 180° Mini Industrial Cabinet Hinge

1. Full Technical Specifications

Shared General Parameters

• Max Opening Angle: 180 degrees
• Material: High-pressure die-cast zinc alloy body, Φ4 solid carbon steel rotation pin
• Surface Treatment: Matte black powder coating (anti-corrosion, wear-resistant, dustproof)
• Overall Size: 40mm length × 40mm width × 9mm thickness
  

  2. Core Product Features & Advantages

  2.1 Mini Compact Die-Cast Zinc Alloy Structure

  40×40mm ultra-small footprint, integrated zinc alloy die-casting brings high structural rigidity and anti-deformation ability. Perfectly matches lightweight small equipment panels, effectively bear the load of miniature cabinet doors without loosening after long-term frequent opening.

  2.2 Protective Black Powder Coating Layer

  Uniform matte black powder coating isolates air, moisture and workshop dust, prevents zinc alloy oxidation and rust. The coating is resistant to scratches, oil and chemical splashes, easy to wipe and maintain for industrial working environments.

  2.3 Φ4 Precision Steel Pin for Stable Rotation

  Solid steel central pin with tight tolerance fit ensures wobble-free rotation, low friction loss, avoids hinge sagging and gap enlargement after tens of thousands of opening cycles, extending overall service life greatly.

  2.4 180° Full Flat Opening Design

  180-degree maximum opening flips the door completely parallel to the cabinet frame, zero blocking during internal circuit inspection, component replacement, equipment debugging and routine cleaning, greatly improving operation convenience.

  2.5 Dual Installation Solutions for Different Panels

  1. CL226-3A M5 Embedded Stud Version Two protruding M5 threaded posts on the rear side. Simply drill through holes on the enclosure wall, pass studs through and fasten with lock nuts on reverse side. Fast batch assembly, fits thick metal plates and hollow cabinet shells.
  2. CL226-3 Countersunk Hole Version Four standard 90° countersunk recesses allow flat head screws to sink fully into the hinge surface for flush installation. Clean and flat outer surface, no protruding parts, widely used for standard sheet metal instrument boxes.

  3. Wide Application Scenarios

  1. Mini electrical control boxes, small PLC enclosures, sensor junction boxes, low-power terminal distribution casings
  2. Laboratory testing instruments, portable measuring equipment housings, analytical device protective panels
  3. Small automation actuator enclosures, industrial vision camera shields, micro motor protective boxes
  4. Outdoor miniature monitoring housings, small lithium battery storage boxes, waterproof signal transfer enclosures
  5. Medical small detection equipment casings, environmental micro monitoring control boxes and lightweight sheet metal tool cases

  4. Installation Steps & Maintenance Guidelines

  4.1 CL226-3A (M5 Stud Model) Installation

  1. Drill two matching through holes on the cabinet panel for M5 studs
  2. Insert embedded M5 bolts from the front face
  3. Add washers and tighten nuts on the back side
  4. Test 180° opening smoothness and hinge firmness

  4.2 CL226-3 (Countersunk Hole Model) Installation

  1. Mark four hole positions, drill Φ5.3 holes and machine 90° countersink recesses
  2. Place hinge flat and lock with M5 flat head screws
  3. Check door rotation flexibility and load balance

  4.3 Installation Quantity Suggestion

  • Door height ≤ 400mm: Use 2 hinges symmetrically
  • Door height 400–700mm: Use 3 hinges to prevent door deflection and sagging

  4.4 Maintenance Precautions

  ❌ Not recommended for long-term use in strong acid/alkali corrosive workshops, coastal high salt fog and heavy chemical vapor environments.

  1. Clean the black coating surface regularly to remove metal filings and greasy dirt
  2. Apply tiny amount of dry lubricant on the central steel pin every 6 months for silent and smooth rotation

  Product Summary

  CL226-3 series are 40×40mm compact 180-degree opening zinc alloy mini industrial hinges, divided into CL226-3A (M5 embedded threaded studs) and CL226-3 (four countersunk flush holes) two mounting options. With high-strength die-cast zinc alloy body, anti-rust black powder coating and durable solid steel pivot pin, it delivers stable lightweight load capacity and full flat opening, serving as standard precision hardware for miniature control cabinets, laboratory instruments and small automation equipment enclosures.

  CL226-3A M5 embedded stud zinc alloy hinge CL226-3 countersunk hole black powder coated 180 degree small equipment cabinet zinc alloy hinge