CL225-2 52mm Mini White Zinc Plated Steel Spring Loaded Drop Pin Detachable Barrel Hinge, Left & Right Hand Available

Complete Technical Specifications

• Model No.: CL225-2
• Material: Cold rolled carbon steel, base plate thickness t=1.5mm, locating pin diameter Φ4mm
• Surface Finish: Electroplated white zinc coating (anti-rust, anti-oxidation)
• Overall Dimensions: Total height 52mm, width 16.5mm
• Mounting Holes: 2 pieces Φ3.2 through holes, vertical hole spacing 19mm
• Pin Diameter: Φ4 tapered spring pin
• Model Classification Table

Core Product Features & Advantages

2.1 Ultra-Compact All-Steel Robust Construction

Whole piece stamped steel structure with 1.5mm reinforced base plate and solid Φ4 steel pin. Tiny overall footprint saves limited installation space inside mini cabinets, excellent torsion resistance and load capacity, not easy to bend or deform under long-term use.

2.2 White Zinc Plating for Reliable Corrosion Resistance

Uniform white zinc electroplated layer forms a protective barrier against moisture, dust and mild oxidation. Stable performance in indoor workshops and slightly humid environments, effectively extend hardware service life and reduce after-sales replacement cost.

2.3 Built-in Spring Auto Lock Safety Design

Internal compression spring provides constant upward tension to lock the drop pin firmly after assembly. Prevent the pin from popping out accidentally during frequent door opening and closing, eliminate the risk of cabinet door falling off and improve equipment operation safety.

2.4 Pre-Drilled Holes for Fast Screw Mounting

Comes with two standard Φ3.2 mounting holes on the fixed leaf, directly fixed with small machine screws without welding operation. Simplify assembly workflow for mass production lines, convenient for later disassembly, repair and component replacement.

2.5 Independent Left & Right Hand Matching

Separate left-hand (CL225-2-Z) and right-hand (CL225-2-Y) directional hinges, select according to cabinet door opening direction. Perfect match for single leaf door, double door and side flip small equipment housings.

2.6 Tool-Free Quick Lift-off Disassembly

Press down the spring to retract the tapered Φ4 pin, then lift the cabinet door upward directly to detach it completely without any tools. Greatly boost efficiency for internal wiring inspection, part maintenance and cabinet packaging & transportation.

Wide Application Scenarios

1. Mini electrical control boxes, terminal junction boxes, sensor protective shells and small PLC instrument enclosures
2. Laboratory precision testing equipment, miniature medical devices, automation module protective covers
3. Indoor weak current distribution boxes, small charging module control panels, communication terminal boxes
4. Compact sheet metal cabinets, auxiliary safety doors for small machine tools, electrical panel flip covers
5. Narrow-space equipment requiring hidden, small-size detachable pivot hinges

Installation & Maintenance Instructions

4.1 Step-by-Step Installation

1. Choose left (CL225-2-Z) or right (CL225-2-Y) hinge based on door opening direction
2. Mark 19mm vertical hole spacing on cabinet frame, drill Φ3.2 holes
3. Lock the fixed half tightly with screws, compress the spring and insert the Φ4 locating pin into the barrel
4. Test door rotation smoothness, verify spring self-locking function and easy lift-off performance

4.2 Installation Quantity Suggestion

• Door height ≤ 350mm: Install 2 hinges symmetrically
• Door height 350–600mm or slightly heavy metal door: Add 1 middle hinge to avoid door sagging

4.3 Maintenance Notes

❌ Not suitable for long-term use in strong acid/alkali corrosive atmosphere, heavy dust workshops and coastal salt fog environments.

1. Wipe the zinc-plated surface regularly with dry soft cloth to keep clean
2. Apply a small amount of anti-rust lubricant on spring and pin joint every 3–6 months to maintain flexible rebound and sliding

Product Overview Summary

CL225-2 is a miniature spring loaded drop pin detachable barrel hinge made of full carbon steel with durable white zinc anti-corrosion plating. It supports left and right hand selection, adopts pre-drilled screw-on installation and spring automatic locking structure, enabling tool-free rapid door removal. Its compact size and stable mechanical performance make it an economical standardized hardware accessory for small electrical boxes, precision instruments and compact industrial sheet metal enclosures.

CL225-2 spring loaded drop pin hinge white zinc plated steel left right detachable mini cabinet lift off barrel hinge 2-Φ3.2 mounting holes