CL283-2A 90mm SUS304 Stainless Steel 120° Grinding Polished Lift-Off Hinge with Countersunk Flush Mounting

Full Technical Specifications

Model Number: CL283-2A
Material: SUS304 stainless steel
Surface Finish: Grinding (precision polished) — corrosion-resistant, sleek reflective appearance
Maximum Opening Angle: 120°
Overall Dimensions: 90mm total length × 25mm side height
Main Body Length: 51.6mm, 49mm, 25mm hole center spacing
Pivot Pin Diameter: Φ6mm
Material Thickness: t=2.5mm
Mounting Holes: 2 pieces Φ5.3 through holes with Φ9.3×90° countersunk counterbores, 25mm center spacing
Side Profile: 25mm total height, 25mm, 22mm width, 7.5mm internal, 33.5mm top dimension, t=2.5mm
Front Profile: 16.5mm + 5.5mm = 22mm total height
Core Features: Full SUS304 corrosion resistance, grinding polished finish, lift-off detachable design, countersunk flush M5 mounting, 120° opening, Φ6 pivot pin, 2.5mm robust thickness

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 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.

4 Countersunk Flush Mounting for Clean Snag-Free Exterior

The 2×Φ5.3 mounting holes are machined with Φ9.3×90° countersunk counterbores, allowing M5 flat head screws to sink completely flush with the hinge surface. This creates a smooth, snag-free exterior that eliminates protruding screw heads, improving safety, aesthetics and ease of cleaning. The flush mounting is particularly suitable for applications where a clean, professional appearance is desired.

5 120° Opening Angle for Controlled Access

The 120-degree maximum opening angle provides adequate access for internal wiring, component replacement, equipment inspection and routine maintenance work on most standard cabinet configurations. The angle is calibrated to prevent the door from striking adjacent equipment or walls while still providing sufficient operational access.

6 Robust 2.5mm Thickness with 90mm Length

The substantial 2.5mm material thickness and 90mm overall length provide robust structural rigidity and reliable load-bearing capacity for medium to heavy cabinet doors. The extended length distributes the door weight across a broader area, effectively resisting sagging and deformation under long-term use.

Application Fields

Electrical control cabinets, low-voltage distribution boxes, frequency converter enclosures and PLC equipment housings requiring detachable doors
CNC machine tool guards, automation equipment protective doors and industrial machinery access panels
Communication equipment cabinets, outdoor server boxes and signal transfer enclosures
Food processing equipment, stainless steel sanitary cabinets and cleanroom facility enclosures
Medical equipment housings, laboratory analytical instruments and environmental monitoring control boxes
Outdoor monitoring equipment, weather-resistant instrument panels and coastal equipment enclosures
Marine and boat equipment, RV accessories and outdoor fixtures requiring corrosion-resistant stainless steel hardware
Premium furniture, electronic equipment casings and decorative enclosures where polished appearance is preferred
Sheet metal tool cabinets, industrial console doors and storage enclosures requiring frequent door removal
Applications where lift-off detachable functionality, countersunk flush mounting and corrosion-resistant polished hardware are required

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
Mark and drill 2×Φ5.3 through holes at 25mm center spacing on both the frame and door panel
Machine 90° countersunk counterbores to Φ9.3 diameter on the mounting surface side to accommodate M5 flat head screws
Fasten the frame-mounted half to the cabinet frame with M5 flat head screws through the 2 countersunk holes
Fasten the door-mounted half to the door panel with M5 flat head screws through the 2 countersunk holes
Confirm that all 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 120° 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 ≤700mm: Install 2 lift-off hinges symmetrically (top and bottom)
Door height 700mm to 1300mm or medium-weight steel door: Install 3 hinges (top, middle, bottom) for balanced load distribution
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 the 2 countersunk M5 mounting screw tightness 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 2.5mm hinge body annually for any signs of bending, deformation or excessive wear
Verify that the countersunk screw heads remain flush and do not protrude over time

Product Summary

CL283-2A is a lift-off detachable hinge manufactured from premium SUS304 stainless steel with precision grinding polished finish, featuring 2×Φ5.3 countersunk mounting holes with Φ9.3×90° counterbores for flush M5 screw installation. Its full SUS304 corrosion resistance, sleek polished appearance, innovative lift-off tool-free door removal design, countersunk flush mounting for a clean snag-free exterior, robust 2.5mm thickness, Φ6 precision pivot pin and 120° opening angle make it an ideal hardware solution for electrical cabinets, machinery enclosures, communication equipment, medical devices, food processing enclosures, outdoor equipment and various industrial applications requiring durable corrosion-resistant detachable hardware with premium polished appearance and clean flush mounting.

CL283-2A SUS304 stainless steel grinding polished lift off hinge 120 degree 2-Φ5.3 Φ9.3×90 countersunk holes Φ6 pin industrial cabinet equipment door hinge