CL226-2C 50×50mm Zinc Alloy 180° Step Countersunk Hole Industrial Butt Hinge

1. Full Technical Parameters

• Model No.: CL226-2C
• Overall Dimension: 50mm (L) × 50mm (W) × 8mm thickness
• Max Opening Angle: 180°
• Material: Die-cast zinc alloy body, Φ6 solid carbon steel rotation pin
• Surface Finish: Matte black powder coating (anti-corrosion, scratch-resistant, dustproof)
• Mounting Holes: 4 × Φ6.3 step countersunk holes (counterbore stepped holes for flush mounting)
• Pin Diameter: Φ6mm

2. Core Product Advantages

2.1 Compact High-Strength Zinc Alloy Die-Cast Body

Integrated high-pressure die-casting molding delivers excellent structural rigidity and impact resistance. 50×50mm mini square outline perfectly matches small and medium-sized equipment panels, resisting deformation under long-term frequent opening and closing.

2.2 Anti-Corrosion Black Powder Coating Treatment

Uniform 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. Matte industrial texture is wear-resistant and easy to clean.

2.3 Φ6 Thickened Solid Steel Rotation Pin

Precision machined solid steel central pin ensures tight assembly clearance, stable wobble-free rotation, low friction loss. It avoids hinge loosening, gap expansion and door sagging after tens of thousands of working cycles to extend service life.

2.4 180° Full Flat Opening Design

180-degree maximum opening allows the equipment door to flip fully flat beside the cabinet frame, completely eliminating visual and operational obstruction during internal wiring inspection, component replacement and equipment debugging.

2.5 Step Counterbore Holes for Flush Hidden Installation

Four specially designed stepped countersunk holes enable machine screws to sink completely inside the hinge plate, realizing seamless flush mounting without protruding fasteners, making the enclosure surface neat and tidy, also preventing screw abrasion and accidental collision.

3. Wide Application Scenarios

1. Small electrical control boxes, mini PLC housings, frequency converter casings and terminal junction boxes
2. Laboratory testing instruments, portable measuring devices, analytical equipment protective panels
3. Automation small actuator enclosures, industrial vision camera shields and micro motor protection boxes
4. Mini outdoor monitoring housings, small lithium battery storage boxes and waterproof signal transfer enclosures
5. Light-duty sheet metal tool boxes, medical inspection equipment casings and environmental micro-monitoring control boxes

4. Installation & Maintenance Instructions

Installation Steps

1. Mark 4 hole positions on the cabinet panel according to the drawing; drill Φ6.3 through holes and process stepped counterbores
2. Fit CL226-2C hinge flat on the mounting surface
3. Fasten with M6 flat head screws into the step holes for flush hidden fixing
4. Test 180° opening smoothness and hinge fastening stability

Installation Quantity Suggestion

• Door height ≤ 400mm: 2 pieces symmetrically installed
• Door height 400–700mm: 3 pieces to prevent deflection and sagging

Maintenance Notes

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

1. Regularly wipe the black coating surface to remove metal shavings and grease
2. Apply a small amount of dry lubricant on the central steel pin every 6 months for silent and smooth rotation

5. Product Summary

CL226-2C is a 50×50mm compact 180-degree opening zinc alloy industrial butt hinge with exclusive stepped counterbore mounting holes. Adopting high-strength die-cast zinc alloy, anti-rust black powder coating and durable Φ6 solid steel pivot pin, it achieves hidden flush installation, stable lightweight load bearing and full flat opening, serving as standard precision hardware for miniature electrical enclosures, laboratory instruments and small automation equipment access doors.

CL226-2C zinc alloy hinge 50×50mm black powder coated 180 degree countersunk step hole industrial cabinet equipment hinge