CL233-2 80×65mm Zinc Alloy 180° Heavy-Duty Butt Hinge with Black Powder Coating

1. Full Technical Specifications

• Model Number: CL233-2
• Overall Dimensions: 80mm (L) × 65mm (H) × 6mm plate thickness
• Maximum Opening Angle: 180°
• Material: High-pressure die-cast zinc alloy body + solid steel pivot pin
• Surface Finish: Matte black powder coating (scratch-resistant, anti-corrosion, dust-proof, oil-resistant)
• Mounting Holes: 6 pieces of Φ8.1 holes with Φ17.5×90° countersunk counterbores
• Hole Center Distances: 50mm horizontal (25mm + 25mm spacing), 42mm vertical
• Pivot Pin: Solid steel pin for durable rotation

2. Core Product Features & Advantages

2.1 High-Strength Die-Cast Zinc Alloy Body

One-piece high-pressure zinc alloy die casting delivers excellent structural rigidity, impact resistance and reliable load-bearing capacity. The 80×65mm enlarged mounting plate and 6mm thickness provide robust support for heavy industrial cabinet doors, resisting deformation under long-term frequent opening and closing.

2.2 Durable Black Powder Coating for Corrosion Protection

The uniform matte black powder coating forms a dense protective layer on the zinc alloy surface, effectively isolating moisture, workshop dust, oil mist and minor chemical splashes to prevent oxidation and rust. The coating is scratch-resistant, easy to wipe clean and maintains a professional industrial appearance over extended service life.

2.3 Solid Steel Pivot Pin for Stable Long-Term Rotation

The solid steel central pin ensures tight assembly clearance, low-friction rotation and high wear resistance. Precision machining maintains wobble-free operation over tens of thousands of open-close cycles, preventing hinge play, gap enlargement and door sagging common in lower-quality alternatives.

2.4 Six Countersunk Holes for Secure Flush Installation

Six standard 90° countersunk mounting holes (Φ8.1 through holes with Φ17.5 counterbores) allow M8 flat head screws to sink completely into the hinge plate, creating a clean flush surface with no protruding fasteners. The six-point fixation pattern distributes load evenly and prevents hinge loosening caused by vibration and mechanical impact.

2.5 180° Full Flat Opening Angle

The 180-degree maximum opening angle enables the cabinet door to lay completely flat against the cabinet side panel, eliminating operational blind zones and providing full unobstructed access for internal wiring, component replacement, equipment inspection and routine maintenance work.

3. Application Fields

1. Heavy electrical control cabinets, low-voltage distribution boxes, frequency converter enclosures and PLC equipment housings
2. CNC machine tool safety guards, automation equipment protective doors and industrial machinery access panels
3. Outdoor communication cabinets, energy storage battery boxes and waterproof monitoring equipment enclosures
4. Heavy-duty sheet metal tool cabinets, large instrument test equipment casings and industrial console doors
5. Medical equipment housings, laboratory analytical instruments and environmental monitoring control boxes
6. Aluminum profile industrial frames, mechanical equipment maintenance hatches and test bench cabinet panels

4. Installation & Maintenance Guidelines

Step-by-Step Installation Procedures

1. Mark six drilling positions according to the technical drawing (50mm horizontal × 42mm vertical spacing), drill Φ8.1 through holes and machine 90° countersunk counterbores
2. Align the CL233-2 hinge flat against the cabinet mounting surface
3. Fasten with M8 flat head screws through all six countersunk holes for secure flush fixation
4. Test the 180° opening movement for smooth rotation and verify hinge stability under door load
5. Retighten all screws periodically to prevent loosening from long-term mechanical vibration

Installation Quantity Recommendation

• Door height ≤700mm: Install 2 hinges in symmetrical arrangement
• Door height 700mm to 1200mm or heavy steel door: Install 3 hinges for balanced stress distribution and sag prevention

Maintenance Instructions

1. Suitable for indoor and mildly corrosive environments; not recommended for long-term deployment in strong acid/alkali workshops, coastal high salt fog or severe chemical vapor conditions
2. Wipe the black powder coated surface periodically with a soft dry cloth to remove metal dust, grease and water stains
3. Apply a small amount of dry lubricant to the steel pivot pin every six months to maintain smooth and quiet rotation
4. Inspect mounting screw tightness quarterly, especially on equipment subject to continuous vibration

5. Product Summary

CL233-2 is a heavy-duty 80×65mm die-cast zinc alloy butt hinge featuring matte black powder coating, a solid steel pivot pin and six countersunk flush mounting holes. With its robust load-bearing capacity, reliable corrosion protection and full 180° opening, it is a cost-effective and durable standard hardware solution for heavy industrial electrical cabinets, machinery enclosures, automation equipment and various industrial equipment access doors.

CL233-2 zinc alloy hinge 80x65mm black powder coated 180 degree heavy duty butt hinge 6 countersunk holes steel pin industrial cabinet equipment hinge