Sheet Metal Bending
The Junction Box is an enclosure used to protect electrical connections,wiring,and terminals from external elements like dust,moisture,and mechanical damage.These boxes are commonly made from sheet metal and can be fabricated using laser cutting,stamping,and bending.
Sheet Metal Bending Process
A force is applied to a metal sheet to deform it into the desired shape.
This is typically done using a press brake machine,which uses a punch and die to form precise bends.
Bending can be performed on stainless steel,aluminum,galvanized steel,and other alloys.
Material Selection
Mild Steel (MS):Strong and cost-effective,needs surface treatment for rust protection.
Stainless Steel (SS304/SS316):Corrosion-resistant,ideal for outdoor and industrial use.
Aluminum:Lightweight and corrosion-resistant,used in electrical and aerospace applications.
Galvanized Steel:Pre-coated for rust resistance,suitable for high-moisture environments.
Standard Sizes
Typically ranges from 100x100x50 mm to 400x400x200 mm,but can be custom-sized.
Includes mounting flanges or brackets for installation.
Features & Components
Pre-cut Knockouts for cable entry (round,square,or conduit-friendly).
Lid with Hinges or Screw Fasteners for easy maintenance.
Gasket Sealing (IP65/IP66 Rated) for waterproof and dustproof protection.
Earth/Grounding Terminals to prevent electrical hazards.

Parameter |
Specification |
Material |
Stainless Steel (SS304/SS316) / Galvanized Steel / Aluminum |
Finish |
Powder Coated / Brushed / Electro-galvanized |
Ingress Protection (IP Rating) |
IP65 / IP66 (Waterproof) / IP54 (General use) |
Mounting |
Wall-Mounted / Floor-Mounted |
Cover Type |
Hinged / Screw-On |
Door Locking |
Quarter Turn Lock / Screw Cover / Key Lock |
Gasket Type |
Neoprene / Silicone (for waterproof sealing) |
Cable Entry |
Pre-punched Knockouts / Custom Drilled Holes |
Certifications |
UL, CE, RoHS, ISO 9001 |
Standard Dimensions |
(For reference; actual sizes can be customized.) |
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Model No. |
Width (mm) |
Height (mm) |
Depth (mm) |
Material Thickness(mm) |
JB-200x200x100 |
200 |
200 |
100 |
1.5mm |
JB-300x300x150 |
300 |
300 |
150 |
1.5mm / 2mm |
JB-400x400x200 |
400 |
400 |
200 |
2mm |
JB-500x500x250 |
500 |
500 |
250 |
2mm / 2.5mm |
JB-600x600x300 |
600 |
600 |
300 |
2.5mm |
Electrical & Environmental Ratings: Our junction box sets the standard for reliability and resilience, engineered to excel in diverse environments and under extreme conditions. It is meticulously tested to deliver consistent performance, ensuring your electrical systems are protected and operational at all times.
Operating Temperature: Thriving in extreme heat and biting cold, our junction box operates seamlessly within a broad temperature spectrum, ranging from -40°C to +80°C, endowing it with the versatility needed for numerous applications.
Dielectric Strength: With superior insulation properties, this junction box can withstand high voltage stress, offering a dielectric strength of 1000V AC for 1 minute, ensuring safety and reliability in high-stakes environments.
Grounding Option: Experience enhanced safety and convenience with an integrated grounding stud, ensuring secure and efficient grounding in all installations. Integrated grounding stud: This thoughtful feature facilitates easy and reliable electrical grounding, enhancing the overall safety of your systems.
Corrosion Resistance: Crafted to withstand the harshest environments, this junction box is expertly designed with robust corrosion resistance. Salt spray tested for marine environments, it promises enduring longevity and sustained aesthetic appeal, even in salt-laden air.
Load Capacity: Demonstrating exceptional strength, our junction box boasts a formidable load capacity that adapts to your project's specific needs. Up to 50kg (varies by size and material), it provides reliable support for your demanding applications, ensuring structural integrity.
Applications of Sheet Metal Junction Boxes: Explore the versatile applications that make this junction box a cornerstone in modern electrical and electronic systems.
Electrical Wiring Enclosures (Residential & Industrial): Offering robust protection for critical wiring systems, our junction boxes are indispensable in both residential and industrial settings.
Control Panels & Automation Boxes: Designed to house complex control panels, they ensure optimal performance for automation systems across industries.
Outdoor & Marine Equipment Protection: These junction boxes safeguard your equipment from harsh outdoor elements, preserving functionality in marine and outdoor environments.
Data & Communication Networks: Perfect for securing delicate data and communication networks, our junction boxes ensure uninterrupted connectivity and protection.

Fabrication Process
Step 1: Laser Cutting (Sheet Metal Cutting)
Harnessing the precision of fiber or CO2 lasers, the metal sheet is meticulously cut into a flawless flat layout.
Cuts include:
Outer Profile:Crafting the distinctive and precise shape of the junction box.
Cable Knockouts & Vent Holes:Ingeniously pre-cut for effortless wiring access and optimal ventilation.
Mounting Holes:Designed for seamless wall or pole installation.
Advantages: High precision,clean edges,and minimal material wastage, ensuring quality and sustainability.
Step 2: Stamping & Punching (Creating Knockouts & Embossing)
Utilizes precision stamping dies or CNC punching machines to:
Create perfect knockout holes for conduit or cable gland integration.
Enhance with embossed labels or markings, including essential grounding symbols,and detailed electrical ratings.
Reinforce panels with strategically added ribs for enhanced strength.
Advantages: Ensures quicker processing times and consistent hole placement for uniformity.
Step 3: Bending & Forming (Shaping the Box)
A precision press brake machine skillfully bends the metal sheet into a robust 3D box structure.
Typical bends:
Precise 90°bends to flawlessly form the sides.
Tabs & Slots crafted for perfect alignment and seamless assembly.
Hinges & Brackets expertly integrated for secure cover attachment.
Considerations:
Bend radius must be optimized to match material thickness and prevent cracks.
The strategic order of bends ensures smooth assembly without any interference.
Step 4: Assembly & Fastening
Welding (Spot or TIG Welding):Seamlessly fuses corners for a flawless and enduring finish.
Rivets or Screws:Employed for scenarios where a detachable cover is desired.
Gaskets & Seals:Delivering IP-rated waterproof protection to ensure durability.
Optional Add-ons:
Cable clamps,grounding terminals,and interior mounting plates are available for customization.
Step 5: Surface Finishing (Protection & Aesthetics)
Powder Coating:Provides exceptional rust resistance,and is available in a variety of stunning colors.
Galvanizing:Applies a zinc coating for superior corrosion protection and longevity.
Anodizing (for Aluminum):Significantly boosts both the durability and aesthetic appeal of the product, ensuring it not only performs optimally but also looks exceptional.
Specialized Electroplating specifically designed for Stainless Steel, providing superior protection and a sleek finish.:Enhances electrical conductivity to ensure seamless and efficient energy flow, maximizing performance and reliability.

Precision: We are steadfast in our commitment to delivering precision-engineered components meticulously crafted to not only meet but exceed our customers' expectations, ensuring superior quality and satisfaction.
Innovation: We passionately embrace cutting-edge technological advancements to continuously enhance our processes and products, setting new benchmarks in innovation and efficiency.
Integrity: With unwavering dedication, we uphold the highest ethical standards in all our business practices, fostering trust and cultivating long-term partnerships with our valued clients.
Custom Manufacturing: Our expertise in custom manufacturing enables us to create tailored solutions meticulously designed to meet the unique specifications and application requirements of our clients.
Prototyping: Our rapid prototyping capabilities are key to facilitating swift product development and testing, allowing for efficient refinement and innovation.
Surface Finishing: We offer an extensive range of comprehensive surface treatment options, including polishing, anodizing, and plating, to enhance both the aesthetics and functionality of our products, ensuring they meet the highest standards of appearance and performance.



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