CL270 Steel White Zinc Plated Weld-On Barrel (Cylindrical Tube) Hinge — 4 Size Variants

Full Technical Specifications

• Model Variants (A = barrel diameter, B = barrel length):
  • CL270-1: A=Φ26mm, B=150mm (heavy-duty large size)
  • CL270-2: A=Φ25mm, B=120mm (medium-heavy size)
  • CL270-3: A=Φ14mm, B=120mm (standard medium size)
  • CL270-4: A=Φ10mm, B=60mm (compact lightweight size)
• Material: Solid steel
• Surface Finish: White zinc plating (rust-proof, wear-resistant, clean industrial appearance)
• Hinge Type: Weld-on barrel / cylindrical tube hinge (two-piece split design)
• Installation Method: Direct welding onto metal door frame and door panel
• Cross-Section: Circular cylindrical barrel with internal pivot pin
• Design Feature: Two-piece split barrel for smooth rotation and optional lift-off door removal
• Core Features: Heavy-duty steel construction, weld-on concealed installation, white zinc corrosion resistance, four size variants, no visible mounting hardware, smooth cylindrical rotation

Core Product Features & Advantages

1 Heavy-Duty Solid Steel Construction for Maximum Load Capacity

The entire barrel hinge is fabricated from robust solid steel, providing exceptional structural rigidity, impact resistance and heavy load-bearing capacity. The thick-walled cylindrical design distributes door weight evenly across the full barrel length, making it suitable for heavy industrial doors, gates and large equipment enclosures where standard screw-mounted hinges would be insufficient.

2 Weld-On Installation for Clean Concealed Appearance

The barrel hinge is designed for direct welding installation onto metal door frames and door panels, creating a permanent, ultra-strong connection with no visible screws, bolts or mounting hardware on the cabinet exterior. This weld-on method provides a clean, seamless and professional appearance while eliminating the risk of screw loosening from vibration, making it ideal for heavy machinery and high-vibration industrial environments.

3 Four Size Variants for Versatile Application Matching

The hinge is available in four carefully calibrated size variants to accommodate a wide range of door weights, sizes and installation requirements:

• CL270-1 (Φ26×150mm): Largest variant for heavy-duty large doors and gates
• CL270-2 (Φ25×120mm): Medium-heavy variant for substantial industrial doors
• CL270-3 (Φ14×120mm): Standard variant for medium-weight equipment doors
• CL270-4 (Φ10×60mm): Compact variant for lightweight and space-limited applications

This comprehensive size range ensures optimal hinge selection for any project, from small enclosures to heavy industrial gates.

4 Two-Piece Split Barrel for Smooth Rotation and Lift-Off Capability

The barrel hinge features a two-piece split design with an internal pivot pin, enabling smooth, low-friction rotation. The split construction also allows for optional lift-off door removal when the hinge halves are vertically aligned, providing flexibility for applications requiring full door removal for maintenance or access.

5 White Zinc Plating for Corrosion Protection

The uniform white zinc plating forms a protective layer that effectively resists oxidation, rust and surface abrasion, providing reliable performance in standard indoor and sheltered outdoor industrial environments. The plating also creates a clean, professional metallic appearance that matches standard industrial hardware finishes.

6 Cost-Effective Robust Industrial Hardware

Combining solid steel construction, weld-on permanent installation, white zinc corrosion protection and multiple size options, this barrel hinge offers excellent value for heavy industrial applications. It provides reliable, long-lasting performance at a cost-effective price point, making it suitable for high-volume production runs, OEM equipment and large-scale industrial projects.

Application Fields

1. Heavy industrial doors, factory gates, warehouse doors and large equipment access panels requiring welded heavy-duty hinges
2. CNC machine tool guards, large automation equipment protective doors and heavy machinery enclosures
3. Trailer doors, truck body panels, container doors and transportation equipment requiring robust welded pivot hardware
4. Outdoor metal gates, fence doors, security doors and perimeter access control enclosures
5. Large electrical control cabinets, heavy distribution boxes and industrial power equipment enclosures
6. Agricultural machinery doors, farm equipment access panels and outdoor industrial enclosures
7. Construction equipment cabins, heavy vehicle access doors and industrial machinery operator enclosures
8. Steel structure doors, metal frame building access panels and industrial facility entrance doors
9. High-vibration industrial equipment where screw-mounted hinges would loosen over time
10. Applications requiring a clean concealed hinge appearance with no visible mounting hardware

Installation & Maintenance Guidelines

Step-by-Step Installation Procedures

1. Select the appropriate size variant based on door weight, dimensions and installation requirements:
   • CL270-1 (Φ26×150mm) for heavy large doors
   • CL270-2 (Φ25×120mm) for medium-heavy doors
   • CL270-3 (Φ14×120mm) for standard medium doors
   • CL270-4 (Φ10×60mm) for compact lightweight doors
2. Determine the installation positions on both the metal door frame and door panel
3. Ensure the welding surfaces are clean, free of rust, paint and grease for proper weld adhesion
4. Position one half of the split barrel hinge on the door frame and the other half on the door panel, ensuring proper vertical alignment
5. Tack-weld both hinge halves in place and verify door alignment and smooth rotation before final welding
6. Perform full welding around the contact points between the barrel and metal surfaces, ensuring strong, continuous welds
7. Allow the welds to cool completely and clean up any welding spatter or slag
8. Test the door rotation for smooth operation and verify that the hinge provides the expected range of motion
9. If lift-off functionality is desired, verify that the door can be lifted vertically off the pivot pin
10. Touch up any weld areas with matching zinc-rich paint to maintain corrosion protection

Installation Quantity Recommendation

• Standard door height ≤1000mm: Install 2 barrel hinges symmetrically (top and bottom)
• Door height 1000mm to 2000mm or heavy steel door: Install 3 hinges (top, middle, bottom) for balanced load distribution
• Very heavy or large doors/gates: Install 4 or more hinges as needed, distributed evenly along the door edge
• Note: For proper lift-off operation, all hinges on a door should be vertically aligned with matching size variants

Maintenance Instructions

1. Suitable for indoor and sheltered outdoor environments; for direct outdoor exposure, additional corrosion protection (paint or powder coating over the zinc plating) is recommended
2. Apply a small amount of grease or heavy-duty lubricant to the internal pivot pin every six months to maintain smooth rotation, especially for heavy doors
3. Inspect the welds annually for any signs of cracking, fatigue or separation; re-weld if any damage is detected
4. Inspect the white zinc plating annually for chips or scratches; touch up with zinc-rich paint if necessary to maintain rust protection
5. For outdoor or coastal applications, rinse the hinge periodically with fresh water to remove salt deposits and inspect more frequently for corrosion
6. Test the door rotation annually for any signs of binding, excessive play or misalignment; adjust or replace hinges if wear is detected
7. If the hinge is used in high-vibration environments, inspect welds more frequently (quarterly) to ensure structural integrity

Product Summary

CL270 is a heavy-duty weld-on barrel (cylindrical tube) hinge manufactured from solid steel with white zinc plating, available in four size variants (CL270-1 Φ26×150mm, CL270-2 Φ25×120mm, CL270-3 Φ14×120mm, CL270-4 Φ10×60mm). Its robust steel construction provides exceptional load-bearing capacity, the weld-on installation creates a permanent ultra-strong connection with a clean concealed appearance, the two-piece split barrel design enables smooth rotation and optional lift-off door removal, and the white zinc plating offers reliable corrosion protection for standard industrial environments. With its comprehensive size range and cost-effective performance, it is an ideal hardware solution for heavy industrial doors, gates, machinery enclosures, trailer doors, outdoor equipment and various applications requiring robust welded pivot hardware with no visible mounting hardware.

CL270 steel white zinc plated weld on barrel hinge cylindrical tube hinge Φ26 Φ25 Φ14 Φ10 diameter 150mm 120mm 60mm length industrial cabinet equipment door hinge CL270-1 CL270-2 CL270-3 CL270-4