CL249 180° Lift-off Detachable Butt Hinge — Steel (White Zinc Plated) / SUS304 (Wire Polished), Left & Right Versions

Full Technical Specifications

• Model Variants:
  • CL249-1-Z: Steel, Left-hand hinge
  • CL249-1-Y: Steel, Right-hand hinge
  • CL249-1B-Z: SUS304, Left-hand hinge
  • CL249-1B-Y: SUS304, Right-hand hinge
• Overall Dimensions: 108mm total length × 90mm height × 3mm plate thickness
• Maximum Opening Angle: 180°
• Material Options:
  • Steel version: Carbon steel
  • SUS304 version: SUS304 stainless steel
• Surface Finish:
  • Steel version: White zinc plating (rust-proof, wear-resistant)
  • SUS304 version: Wire polishing (satin metallic, corrosion-resistant)
• Mounting Holes: 8 pieces Φ5.1 holes with Φ10.1×90° countersunk counterbores
• Hole Center Distances: 25.5mm × 3 horizontal spacing (102mm total), 65mm vertical spacing, 8mm row offset
• Design Feature: Oval rounded-end plate, lift-off detachable two-piece structure
• Installation Orientation: Left-hand (Z) and Right-hand (Y) versions available

Core Product Features & Advantages

1 Lift-off Detachable Two-Piece Structure for Tool-Free Door Removal

The separable lift-off design allows the entire cabinet door to be lifted vertically and completely detached in seconds without loosening any screws or using tools. This dramatically improves efficiency during cabinet transportation, on-site assembly, internal wiring inspection, component replacement and routine maintenance work, while the clean barrel profile provides a neat and professional appearance.

2 Dual Material Options for Versatile Application Requirements

Two material variants are available to match different environmental and budget needs: the steel version with white zinc plating offers cost-effective rust protection for standard indoor industrial applications, while the SUS304 stainless steel version with wire polishing finish delivers superior corrosion resistance, salt spray endurance and a premium satin appearance for outdoor, coastal and harsh-environment installations.

3 Left & Right Hand Versions for Flexible Installation

Both left-hand (Z suffix) and right-hand (Y suffix) versions are offered, allowing installers to select the appropriate hinge orientation based on door swing direction and cabinet layout. This ensures optimal clearance and smooth operation regardless of whether the door opens from the left or right side.

4 Large 108×90mm Oval Plate with 8-Point Mounting for Heavy-Duty Load

The oversized 108×90mm oval rounded-end plate provides a broad mounting surface for excellent load distribution, while the 8×Φ5.1 countersunk holes (with Φ10.1 counterbores) allow M5 flat head screws to sink completely flush. The 8-point fixation pattern ensures robust and stable installation on heavy cabinet doors, resisting sagging and deformation under long-term frequent opening and closing.

5 180° Full Flat Opening Angle

The 180-degree maximum opening angle enables the cabinet door to lay completely flat against the cabinet side panel, eliminating operational blind zones and providing full unobstructed access for internal wiring, component replacement, equipment inspection and routine maintenance work.

6 Durable Surface Treatment for Long Service Life

The white zinc plating on the steel version provides effective oxidation and rust resistance for indoor workshop environments, while the wire polishing on the SUS304 version produces a consistent satin metallic finish that resists fingerprints, scratches and corrosion over years of service in demanding conditions.

Application Fields

1. Heavy electrical control cabinets, low-voltage distribution boxes, frequency converter enclosures and PLC equipment housings
2. CNC machine tool safety guards, automation equipment protective doors and industrial machinery access panels
3. Outdoor communication cabinets, energy storage battery boxes and waterproof monitoring equipment enclosures (SUS304 version recommended)
4. Heavy-duty sheet metal tool cabinets, large instrument test equipment casings and industrial console doors
5. Medical equipment housings, laboratory analytical instruments and environmental monitoring control boxes
6. Food processing equipment, stainless steel sanitary cabinets and cleanroom facility enclosures (SUS304 version)
7. Coastal and marine equipment enclosures, port machinery control boxes and offshore instrument housings (SUS304 version)
8. Applications requiring frequent tool-free door removal for maintenance and inspection

Installation & Maintenance Guidelines

Step-by-Step Installation Procedures

1. Determine the door swing direction and select the appropriate left-hand (Z) or right-hand (Y) hinge version
2. Mark 8 drilling positions according to the technical drawing (25.5mm horizontal spacing × 3, 65mm vertical spacing, 8mm row offset), drill Φ5.1 through holes and machine 90° countersunk counterbores
3. Fasten the fixed hinge half to the cabinet frame with M5 flat head screws through all 4 countersunk holes
4. Fasten the lift-off hinge half to the cabinet door with M5 flat head screws through all 4 countersunk holes
5. Align the two halves vertically and lower the door to engage the lift-off barrel
6. Test the 180° opening movement for smooth rotation and verify the lift-off detachment function
7. Confirm that the door closes properly and lifts off smoothly without binding

Installation Quantity Recommendation

• Door height ≤800mm: Install 2 hinges symmetrically
• Door height 800mm to 1500mm or heavy steel door: Install 3 hinges for balanced load distribution and sag prevention

Maintenance Instructions

1. Steel version (CL249-1-Z/Y): suitable for indoor dry environments; not recommended for long-term outdoor exposure, high-humidity areas or coastal salt spray
2. SUS304 version (CL249-1B-Z/Y): suitable for both indoor and outdoor environments, including damp, coastal and mildly corrosive conditions
3. Wipe the surface periodically with a soft dry cloth to remove dust, grease and moisture; for SUS304 version, avoid abrasive cleaners that may scratch the wire-polished finish
4. Apply a small amount of dry lubricant to the lift-off barrel and pivot pin every six months to maintain smooth rotation and easy lift-off
5. Check mounting screw tightness quarterly to prevent loosening from vibration
6. Inspect the surface treatment annually for chips or scratches; touch up with matching paint or zinc-rich coating if necessary to maintain corrosion protection

Product Summary

CL249 is a heavy-duty 180° lift-off detachable butt hinge available in carbon steel (white zinc plated) or SUS304 stainless steel (wire polished), with both left-hand and right-hand versions. Its tool-free door detachment function, large 108×90mm oval plate, 8-point countersunk mounting and dual material options make it a robust and versatile hardware solution for heavy electrical cabinets, machinery enclosures, communication equipment, outdoor installations and various industrial applications requiring frequent quick door removal for maintenance and inspection.

CL249 steel SUS304 lift off detachable butt hinge 180 degree white zinc plated wire polishing 8 countersunk holes left right industrial cabinet hinge