CL293 116mm Steel Sand Spray Nickel Plated 90° Heavy-Duty Concealed Hinge

Full Technical Specifications

Model Number: CL293
Material: Solid steel
Surface Finish: Sand spray nickel plating (matte metallic appearance, wear-resistant, corrosion-resistant)
Maximum Rotation Angle: 90°
Overall Dimensions: 116mm total length × 47mm side height × 44mm front height
Main Body Length: 68mm, 50mm hole center spacing (top view)
Pivot Pin Diameter: Φ10mm, with retaining ring (开口挡圈 /circlip) for secure pin retention
Mounting Holes: 4 pieces Φ8.1 through holes, 70mm and 100mm center spacing
Side Profile: 47mm total height, 37mm, 64mm width, 20mm, 12mm door frame, 22mm, 57mm
Door Panel Compatibility: 10mm thickness
Door Frame Compatibility: 12mm thickness
Front Profile: 44mm total height, 34mm
Core Features: Heavy-duty steel construction, sand spray nickel finish, concealed hidden design, Φ10 pin with retaining ring, 90° opening, four-point M8 mounting, thick door compatibility, robust load capacity

Core Product Features & Advantages

1 Heavy-Duty Solid Steel Construction for Maximum Load Capacity

The entire hinge is fabricated from robust solid steel, providing exceptional structural rigidity, impact resistance and heavy load-bearing capacity. The thick-walled construction and substantial 116mm length ensure reliable performance under heavy door loads and repeated opening and closing cycles, making it suitable for large, heavy industrial cabinet doors where standard hinges would be insufficient.

2 Sand Spray Nickel Plating for Refined Corrosion-Resistant Finish

The sand spray nickel plating creates a refined matte metallic surface that is highly resistant to scratches, abrasion and corrosion. The plating provides a professional, understated appearance that matches standard industrial hardware finishes while offering long-lasting protection against environmental factors in indoor and sheltered outdoor applications.

3 Concealed Design for Clean Professional Exterior

The innovative concealed design ensures that minimal hinge hardware is visible on the exterior of the cabinet door when closed, creating a clean, seamless and professional appearance. The hinge body mounts within a recessed configuration on the cabinet frame and door, providing a hidden hinge solution ideal for applications where aesthetic appearance and smooth exterior surfaces are important.

4 Φ10 Heavy-Duty Pivot Pin with Retaining Ring

The Φ10 heavy-duty pivot pin provides substantial load-bearing strength and rotational durability for heavy cabinet doors. The integrated retaining ring (开口挡圈 /circlip) ensures secure pin retention, preventing the pin from accidentally disengaging during operation while allowing for controlled disassembly when needed. This robust pin design delivers smooth, stable rotation over tens of thousands of open-close cycles.

5 90° Controlled Opening Angle for Thick Door Applications

The 90-degree maximum rotation angle is specifically calibrated for heavy thick-door applications where limited door swing is preferred or required. The controlled opening prevents the door from striking adjacent equipment, walls or obstacles, while still providing adequate access for internal wiring, component replacement and routine maintenance work on standard cabinet configurations.

6 Four-Point M8 Mounting for Thick Door Panels and Frames

The 4×Φ8.1 mounting holes (70mm and 100mm spacing) allow M8 screws to securely fasten the hinge to both thick door panels (10mm) and door frames (12mm). The four-point fixation pattern on the substantial 116mm plate provides robust, balanced load distribution and stable installation, ensuring the hinge remains securely anchored even under heavy door weight and frequent operation.

Application Fields

Heavy electrical control cabinets, large low-voltage distribution boxes, frequency converter enclosures and PLC equipment housings with thick door construction
Large CNC machine tool guards, heavy automation equipment protective doors and industrial machinery access panels
Server racks, data center enclosures, communication equipment cabinets and IT infrastructure housings
Sheet metal heavy tool cabinets, large industrial console doors, workbench cabinets and premium storage enclosures
Test bench heavy cabinets, laboratory equipment enclosures and environmental monitoring control boxes
High-end equipment enclosures, kiosks, point-of-sale systems and display cases requiring robust concealed hardware
Aluminum profile heavy industrial frames, mechanical equipment maintenance hatches and large test fixtures
Heavy doors (10mm thick panels) requiring robust load-bearing capacity and concealed appearance
Indoor industrial applications where sand spray nickel plated finish and 90° limited opening are preferred
Applications requiring a clean, professional exterior with no visible hinge hardware when the door is closed

Installation & Maintenance Guidelines

Step-by-Step Installation Procedures

Determine the installation positions on both the cabinet frame (12mm) and door panel (10mm) according to the dimension drawing
Mark and drill 4×Φ8.1 through holes at 70mm and 100mm center spacing on both the frame and door panel
Align the hinge halves against the mounting surfaces, ensuring proper recessed positioning for concealed installation
Fasten the frame-mounted half to the cabinet frame with M8 screws through the mounting holes
Fasten the door-mounted half to the door panel with M8 screws through the mounting holes
Verify that the Φ10 pivot pin with retaining ring is properly engaged and secured
Test the 90° opening movement for smooth rotation and verify hinge stability
Confirm that all screw heads are properly seated and do not interfere with hinge operation
Verify that the hinge is properly concealed when the door is closed, with no protruding hardware
Adjust the hinge position slightly if needed to achieve proper door alignment and consistent gap spacing

Installation Quantity Recommendation

Door height ≤800mm: Install 2 heavy-duty concealed hinges symmetrically (top and bottom)
Door height 800mm to 1500mm or heavy steel door (10mm thick): Install 3 hinges (top, middle, bottom) for balanced load distribution
Very heavy or large doors (>1500mm or >60kg): Install 4 hinges distributed evenly along the door edge

Maintenance Instructions

Suitable for indoor and sheltered outdoor environments; the sand spray nickel plating provides good corrosion resistance for most industrial conditions, but is not recommended for long-term direct outdoor exposure, coastal salt spray or severe chemical environments
Wipe the sand spray nickel plated surface periodically with a soft dry cloth to remove dust and grease; avoid abrasive cleaners that may scratch the matte finish
Apply a small amount of heavy-duty lubricant to the Φ10 pivot pin every six months to maintain smooth and quiet rotation, especially for heavy doors
Check all 4 M8 mounting screw tightness quarterly to prevent loosening from vibration
Inspect the retaining ring annually to verify it remains securely in place and the pivot pin does not show signs of excessive play
Inspect the sand spray nickel plating annually for chips or scratches; touch up with matching nickel paint if necessary to maintain corrosion protection
Inspect the hinge body annually for any signs of bending, deformation or excessive wear, especially for heavy door applications
Verify that the 90° opening stop remains functional and that the door does not exceed the intended opening angle or bind during operation

Product Summary

CL293 is a heavy-duty concealed hinge manufactured from robust solid steel with a durable sand spray nickel plated finish, featuring a Φ10 pivot pin with retaining ring, 4×Φ8.1 four-point M8 mounting, 116mm substantial length and 90° controlled opening angle. Its solid steel construction provides exceptional load-bearing capacity, the sand spray nickel plating offers refined corrosion-resistant appearance, the concealed design creates a clean professional exterior, the Φ10 pin with retaining ring ensures secure reliable rotation, and the thick door compatibility (10mm panel / 12mm frame) makes it suitable for heavy industrial cabinet construction. With its robust performance and professional appearance, it is an ideal hardware solution for heavy electrical cabinets, large machinery enclosures, server racks, communication equipment, industrial console doors and various applications requiring robust concealed hardware for thick door construction.

CL293 steel sand spray nickel plated heavy duty concealed hinge 90 degree 4-Φ8.1 mounting holes Φ10 pin retaining ring industrial cabinet equipment thick door hinge