CL139 White Zinc Plated Steel Concealed Embedded Lift-off Industrial Detachable Hinge

CL139 is a hidden embedded split lift-off hinge specially designed for cabinet flush mounting. The main body and rotating pin are made of carbon steel with white zinc electroplated anti-corrosion treatment, matched with a black plastic injection molded embedded base, fixed by ST4.2×18 self-tapping screws. It adopts Φ8.5 thickened rotating shaft and unilateral pull-out separable pin structure, realizing fully concealed installation and tool-free quick disassembly of cabinet doors, widely used in low-voltage electrical boxes, distribution cabinets, equipment control enclosures, tool boxes and sheet metal industrial cabinets.

Detailed Technical Parameters

• Model Number: CL139
• Material: Hinge body & pin = Carbon Steel; Mounting base = Engineering Plastic
• Surface Finish: White Zinc Plated (Electro-galvanized)
• Rotating Shaft Diameter: Φ8.5
• Fastening Screw Specification: ST4.2×18 self-tapping screw
• Overall Length: Max 54mm, mounting section length 44mm
• Structure Type: Concealed embedded installation, unilateral lift-off detachable hinge
• Rotation Mode: 360° free rotation without built-in angle limit stop

1. Material & Anti-Rust Performance Cold rolled steel stamping forming ensures overall structural rigidity and torsion resistance. White zinc plating forms a protective layer on the steel surface to effectively prevent oxidation and rust in indoor dry environments, with prominent cost advantages compared to stainless steel hinges. The engineering plastic base plays the role of embedded positioning, shock absorption, scratch prevention and noise reduction during door opening and closing.
2. Concealed Embedded Installation Advantage The plastic base can be directly pressed into the pre-opened mounting hole of the cabinet plate, the hinge main body is completely hidden inside the door frame, no protruding parts on the outer surface, beautiful and tidy cabinet appearance, avoid collision and scratch during operation, and also reduce the risk of hinge being pried externally.
3. Lift-off Quick Disassembly Function Unilateral pull-out split pin design: directly lift the cabinet door upward to separate the two hinge components without any tools, greatly improving the efficiency of on-site wiring, equipment maintenance, cabinet overhaul and batch production assembly. The Φ8.5 thickened spindle improves load capacity, runs smoothly with low noise, and is not easy to bend and deform under long-term load.
4. Simple and Reliable Fixing Method Only one ST4.2×18 self-tapping screw is required for locking, the operation is simple, no nut matching is needed, suitable for cold rolled steel plates, iron boxes, aluminum alloy panels and other common cabinet materials.

Core Selling Points

1. Fully Concealed Hidden Mounting Embedded plastic base for flush installation, high integrity of cabinet exterior, anti-tampering and anti-collision.
2. Economical White Zinc Plated Steel Material Cost-effective solution for indoor non-corrosive working conditions, stable anti-rust performance.
3. Tool-Free Lift-off Detachable Design One-step door disassembly, convenient for after-sales maintenance and production line assembly.
4. Thickened Φ8.5 Rotating Shaft Strong bearing capacity, durable for frequent opening and closing cycles.
5. Single Screw Quick Lock Structure Simple installation, reduces on-site processing time and labor cost.

Main Application Scenarios

1. Indoor low-voltage distribution boxes, PLC control cabinets, inverter electrical enclosures
2. Automation equipment protective casings, instrument test boxes, industrial control operation boxes
3. Workshop metal tool cabinets, storage boxes, mechanical equipment auxiliary shells
4. Communication weak current boxes, indoor wall-mounted wiring boxes, office electrical equipment cabinets

Selection & Installation Notes

1. Applicable Environment: Only recommended for dry indoor environments; do not use in outdoor, coastal salt fog, high humidity and corrosive gas occasions (choose stainless steel hinge for harsh environments).
2. Hole Opening Requirement: Reserve a matching embedded hole on the cabinet panel according to the plastic base outline size for tight pressing and fixing.
3. Load Suggestion: Install two CL139 hinges symmetrically for larger or heavier door panels to balance the load.
4. Rotation Feature: This model has no mechanical angle limit, can rotate freely 360°, confirm the door swing range before ordering.

Product Summary

CL139 is a cost-effective hidden embedded lift-off hinge focusing on indoor standard cabinet scenarios. It combines concealed aesthetic installation, plastic shock-absorbing base, white zinc rust protection and convenient split pin quick disassembly, providing standardized and economical hidden hinge solutions for electrical cabinet manufacturers and sheet metal equipment enterprises.

CL139 white zinc plated steel concealed lift-off hinge cabinet removable pivot hinge