CL283-12 141mm SUS304 Stainless Steel 180° Grinding Polished Long Lift-Off Hinge

Full Technical Specifications

Model Number: CL283-12
Material: SUS304 stainless steel
Surface Finish: Grinding (precision polished) — corrosion-resistant, sleek reflective appearance
Maximum Opening Angle: 180°
Overall Dimensions: 141mm total length × 25mm side height
Main Body Length: 126mm, 111mm effective length
Pivot Pin Diameter: Φ6mm
Mounting Holes (asymmetric configuration):
- Door-mounted half: 2 pieces Φ5.2 circular through holes, 25mm center spacing
- Frame-mounted half: 3 pieces Φ7 through holes with Φ12×90° countersunk counterbores
Side Profile: 25mm total height, 22.5mm, 17mm width, 9.5mm internal, 3.5mm, 28.5mm top dimension
Bracket Bend Angle: 120°
Vertical Dimension: 15mm
Core Features: Full SUS304 corrosion resistance, grinding polished finish, long 141mm body, lift-off detachable design, asymmetric mounting (2 circular + 3 countersunk), 180° full flat opening, Φ6 pivot pin, heavy load distribution

Core Product Features & Advantages

1 Premium SUS304 Stainless Steel Construction

The entire hinge is fabricated from SUS304 stainless steel, providing excellent corrosion resistance, oxidation resistance and structural durability. Suitable for both indoor and outdoor environments, including damp, coastal, food processing and mildly corrosive conditions, it maintains reliable performance over years of service without rusting or degrading.

2 Grinding Polished Finish for Sleek Corrosion-Resistant Appearance

The precision grinding polishing creates a smooth, reflective metallic surface that elevates the visual quality of any equipment enclosure while providing enhanced corrosion resistance. The polished finish is easy to clean, resists fingerprint accumulation and is ideal for medical, laboratory, food processing and cleanroom applications where hygiene and appearance are critical.

3 Long 141mm Body for Heavy Load Distribution

The substantial 141mm overall length provides broad load distribution across the cabinet door, effectively resisting sagging and deformation under heavy door weight. The extended length is specifically designed for large, heavy cabinet doors where standard shorter hinges would be insufficient, ensuring stable, reliable operation over the long term.

4 Lift-Off Detachable Design for Quick Tool-Free Door Removal

The innovative lift-off design enables quick, tool-free door removal and installation. The door-mounted half simply lifts vertically off the fixed frame-mounted Φ6 pivot pin, allowing complete door removal for unobstructed access to cabinet interiors during maintenance, component replacement or equipment installation. This dramatically reduces servicing time and improves operational efficiency.

5 180° Full Flat Opening Angle for Complete Access

The 180-degree maximum opening angle enables the cabinet door to lay completely flat, eliminating operational blind zones and providing full unobstructed access for internal wiring, component replacement, equipment inspection and routine maintenance work. The full flat opening is particularly beneficial for large, deep cabinets where maximum access is required.

6 Asymmetric Mounting with Countersunk Flush Installation

The hinge features an asymmetric mounting configuration: 2×Φ5.2 circular holes on the door-mounted half for standard M5 screw installation, and 3×Φ7 countersunk holes with Φ12×90° counterbores on the frame-mounted half for M6 flat head screws that sit completely flush. This mixed configuration provides secure, stable installation on both sides while maintaining a clean, snag-free exterior on the frame side.

Application Fields

Heavy electrical control cabinets, large low-voltage distribution boxes, frequency converter enclosures and PLC equipment housings requiring detachable doors
Large CNC machine tool guards, heavy automation equipment protective doors and industrial machinery access panels
Communication equipment large cabinets, outdoor server boxes and signal transfer enclosures
Food processing large equipment, stainless steel sanitary cabinets and cleanroom facility enclosures
Medical equipment large housings, laboratory analytical instruments and environmental monitoring control boxes
Outdoor monitoring equipment, weather-resistant large instrument panels and coastal equipment enclosures
Marine and boat equipment, RV accessories and outdoor fixtures requiring corrosion-resistant stainless steel hardware
Premium large furniture, electronic equipment casings and decorative enclosures where polished appearance is preferred
Sheet metal heavy tool cabinets, large industrial console doors and storage enclosures requiring frequent door removal
Large, heavy doors requiring 180° full flat opening and robust load distribution

Installation & Maintenance Guidelines

Step-by-Step Installation Procedures

Determine the installation positions on both the cabinet frame and door panel according to the dimension drawing
On the door panel: mark and drill 2×Φ5.2 circular through holes at 25mm center spacing for the door-mounted half
On the cabinet frame: mark and drill 3×Φ7 through holes for the frame-mounted half
Machine 90° countersunk counterbores to Φ12 diameter on the frame mounting surface side to accommodate M6 flat head screws
Fasten the frame-mounted half to the cabinet frame with M6 flat head screws through the 3 countersunk holes
Fasten the door-mounted half to the door panel with M5 screws through the 2 circular holes
Confirm that all M6 flat head screw heads are completely flush with the hinge surface and do not protrude
Align the door-mounted half over the frame-mounted Φ6 pivot pin and lower the door into place
Verify that the pivot pin is fully engaged and that the door lifts off smoothly
Test the 180° opening movement for smooth rotation and verify hinge stability
Adjust the hinge position slightly if needed to achieve proper door alignment and consistent gap spacing

Installation Quantity Recommendation

Door height ≤1000mm: Install 2 long lift-off hinges symmetrically (top and bottom)
Door height 1000mm to 1800mm or heavy steel door: Install 3 hinges (top, middle, bottom) for balanced load distribution
Very heavy or large doors (>1800mm): Install 4 hinges distributed evenly along the door edge
Note: For proper lift-off operation, all hinges on a door should be vertically aligned to ensure synchronized pin engagement

Maintenance Instructions

Suitable for both indoor and outdoor environments, including damp, coastal and mildly corrosive conditions; for extreme salt spray or strong chemical environments, regular rinsing with fresh water is recommended
Wipe the grinding polished surface periodically with a soft dry or slightly damp microfiber cloth to remove dust, fingerprints and grease; avoid abrasive cleaners or scouring pads that may scratch the polished finish
Apply a small amount of dry lubricant to the Φ6 pivot pin every six months to maintain smooth and quiet rotation
Check all mounting screw tightness (2 M5 + 3 M6 per hinge) quarterly to prevent loosening from vibration
Inspect the polished surface annually for scratches or corrosion; for coastal applications, rinse with fresh water periodically to remove salt deposits
Test the lift-off operation annually to verify smooth pin engagement and door removal; clean the pivot pin if any debris accumulates
Inspect the hinge body annually for any signs of bending, deformation or excessive wear, especially for heavy door applications
Verify that the 180° full flat opening remains functional and that the door does not bind at any point in the rotation range

Product Summary

CL283-12 is a 141mm long lift-off detachable hinge manufactured from premium SUS304 stainless steel with precision grinding polished finish, featuring 180° full flat opening and asymmetric mounting (2×Φ5.2 circular holes + 3×Φ7 countersunk holes with Φ12×90° counterbores). Its full SUS304 corrosion resistance, sleek polished appearance, extended 141mm length for heavy load distribution, innovative lift-off tool-free door removal design, 180° complete access opening and Φ6 precision pivot pin make it an ideal hardware solution for heavy electrical cabinets, large machinery enclosures, communication equipment, medical devices, food processing enclosures, outdoor equipment and various industrial applications requiring durable corrosion-resistant detachable hardware with full flat opening, robust load capacity and premium polished appearance.

CL283-12 SUS304 stainless steel grinding polished long lift off hinge 180 degree 2-Φ5.2 3-Φ7 Φ12×90 countersunk holes Φ6 pin 141mm industrial cabinet equipment door hinge