CL283-1 SUS304 Stainless Steel 120° Grinding Polished Lift-Off Hinge — Elliptical Holes (CL283-1) / Circular Holes (CL283-1B)

Full Technical Specifications

• Model Variants:
  • CL283-1: Elliptical (oval) mounting holes — 2×Φ6.5 with Φ10.5×90° countersunk counterbores, adjustable M6 mounting
  • CL283-1B: Circular mounting holes — 2×Φ5.2, standard M5 mounting
• 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: 51.5mm, 25mm hole center spacing
• Pivot Pin Diameter: Φ6mm
• Material Thickness: t=2.5mm
• CL283-1 Mounting Holes: 2 pieces Φ6.5 elliptical holes with Φ10.5×90° countersunk counterbores, 25mm center spacing, 10.5mm × 6.2mm hole dimensions
• CL283-1B Mounting Holes: 2 pieces Φ5.2 circular holes, 25mm center spacing, 15mm dimension
• Side Profile: 25mm total height, 23mm, 16.5mm width, 11mm internal, t=2.5mm
• Top Dimension: 27.5mm
• Core Features: Full SUS304 corrosion resistance, grinding polished finish, lift-off detachable design, elliptical adjustable or circular standard 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 Two Mounting Variants for Flexible Installation

The hinge is available in two carefully engineered mounting variants to suit different installation requirements:

• CL283-1 (Elliptical Holes): 2×Φ6.5 elliptical (oval) holes with Φ10.5×90° countersunk counterbores for M6 flat head screws, providing adjustable positioning to compensate for fabrication tolerances and achieve precise door alignment
• CL283-1B (Circular Holes): 2×Φ5.2 circular holes for standard M5 screw mounting, offering straightforward fixed-position installation for applications where adjustability is not required

This dual-option approach ensures optimal mounting flexibility for various cabinet construction standards.

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

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

Installation & Maintenance Guidelines

Step-by-Step Installation Procedures

1. Select the appropriate mounting variant: CL283-1 (elliptical holes, M6 adjustable) or CL283-1B (circular holes, M5 standard)
2. Determine the installation positions on both the cabinet frame and door panel according to the dimension drawing
3. For CL283-1 (elliptical holes): mark and drill 2×Φ6.5 elliptical holes at 25mm center spacing, machine Φ10.5×90° countersunk counterbores for M6 flat head screws
4. For CL283-1B (circular holes): mark and drill 2×Φ5.2 circular holes at 25mm center spacing for M5 screws
5. Fasten the frame-mounted half to the cabinet frame with the appropriate screws
6. Fasten the door-mounted half to the door panel with the appropriate screws
7. Align the door-mounted half over the frame-mounted Φ6 pivot pin and lower the door into place
8. Verify that the pivot pin is fully engaged and that the door lifts off smoothly
9. For CL283-1: use the elliptical hole adjustability to fine-tune door alignment and achieve consistent gap spacing
10. Test the 120° opening movement for smooth rotation and verify hinge stability
11. Confirm that all screw heads are properly seated (flush for CL283-1 countersunk) and do not interfere with hinge operation

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

1. 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
2. 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
3. Apply a small amount of dry lubricant to the Φ6 pivot pin every six months to maintain smooth and quiet rotation
4. Check mounting screw tightness quarterly to prevent loosening from vibration
5. Inspect the polished surface annually for scratches or corrosion; for coastal applications, rinse with fresh water periodically to remove salt deposits
6. Test the lift-off operation annually to verify smooth pin engagement and door removal; clean the pivot pin if any debris accumulates
7. For CL283-1: verify the elliptical hole adjustment annually; re-adjust if door alignment has shifted due to settling or wear

Product Summary

CL283-1 is a lift-off detachable hinge manufactured from premium SUS304 stainless steel with precision grinding polished finish, available in two mounting variants: CL283-1 with 2×Φ6.5 elliptical adjustable holes and Φ10.5×90° countersunk counterbores for M6 flush mounting, and CL283-1B with 2×Φ5.2 circular standard holes for M5 mounting. Its full SUS304 corrosion resistance, sleek polished appearance, innovative lift-off tool-free door removal design, flexible elliptical or circular mounting options, 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 installation flexibility.

CL283-1 SUS304 stainless steel grinding polished lift off hinge 120 degree elliptical circular holes 2-Φ6.5 2-Φ5.2 Φ6 pin industrial cabinet equipment door hinge CL283-1B