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A 400 ton press brake is designed for heavy-duty sheet and plate bending applications that require high forming force, long bending lengths, and stable accuracy. It is widely used for bending mild steel, stainless steel, aluminum, and high-strength steel in structural fabrication, construction machinery, transportation equipment, industrial machinery, and other heavy metalworking applications.
Our 400 ton press brake machines are available with different bending lengths, CNC control systems, backgauge configurations, tooling, and crowning systems. Whether you need a 400T machine for short heavy plates or long structural parts, the machine can be configured according to your material, thickness, bending length, and production requirements.
We provide different configurations of 400 ton hydraulic press brakes and 400 ton CNC press brakes for heavy plate fabrication.
Common configurations include:
400 Ton × 3200 mm Press Brake
400 Ton × 4000 mm Press Brake
400 Ton × 5000 mm Press Brake
400 Ton × 6000 mm Press Brake
Custom bending lengths available according to project requirements
A shorter machine is suitable for compact heavy-duty bending applications, while a longer 400T press brake is often selected for structural components, large enclosures, machinery parts, truck components, and long fabricated sections.
The bending capacity of a 400 ton press brake machine cannot be determined by tonnage alone.
The required bending force depends on several factors:
Material type
Plate thickness
Bending length
V-die opening
Bending angle
Air bending or bottom bending
Material tensile strength
Tooling configuration
For example, bending a short section of mild steel requires much less force than bending the same thickness across a 4-meter or 6-meter length. Stainless steel and high-strength steel also normally require greater bending force than mild steel of the same thickness.
For this reason, we recommend calculating the required tonnage according to your actual workpiece instead of selecting a machine based only on plate thickness.
To confirm whether a 400 ton press brake is suitable for your application, please provide:
| Information | Details Required |
|---|---|
| Material | Mild steel, stainless steel, aluminum, high-strength steel, etc. |
| Plate Thickness | Maximum and commonly used thickness |
| Bending Length | Maximum bending length |
| Bending Angle | Required finished angle |
| Workpiece Drawing | Recommended for complex parts |
| Production Volume | Batch or continuous production |
| Special Requirements | Large opening, deep throat, special tooling, automation, etc. |
Our technical team can recommend the appropriate tonnage, V-die opening, tooling, and CNC configuration according to your workpiece.
The 400 ton 4000mm press brake is a popular heavy-duty configuration for manufacturers that need both high bending force and a relatively long working table.
A 400T 4m press brake is suitable for applications such as:
Structural steel parts
Construction machinery components
Heavy equipment panels
Truck and trailer parts
Large cabinets and enclosures
Industrial machinery frames
Long stainless steel components
For manufacturers processing a wide variety of medium-to-heavy plates, a 400 ton × 4000 mm configuration provides a practical balance between bending capacity and machine size.
For long workpieces, a 400 ton 6000mm press brake provides increased bending length while maintaining high forming force.
A 400T 6m press brake can be considered for:
Long structural components
Large machinery panels
Transport equipment
Shipbuilding components
Large steel enclosures
Infrastructure fabrication
Long sheet metal assemblies
When bending long workpieces, machine frame rigidity, ram synchronization, tooling alignment, and crowning become especially important to maintaining a consistent bending angle across the full length.
For high-force applications, a 400 ton CNC hydraulic press brake combines hydraulic forming power with CNC-controlled positioning and bending management.
Depending on the selected configuration, CNC functions can include:
Y1/Y2 ram control
CNC backgauge positioning
X-axis control
R-axis control
Z1/Z2 finger positioning
Bending program storage
Automatic bending sequence
Angle compensation
Crowning control
Tool and material database
CNC control helps reduce manual adjustment, improve repeatability, and make multi-step bending operations easier to manage.
For factories processing different parts every day, a 400 ton CNC press brake can significantly improve production flexibility compared with a basic conventional machine.
A crowning system is especially important on long and high-tonnage press brakes.
During heavy bending, the ram and worktable are subjected to large loads. Without appropriate compensation, slight machine deflection may cause differences in the bending angle between the center and both ends of the workpiece.
A 400 ton press brake can therefore be equipped with:
Mechanical crowning
CNC-controlled crowning
Automatic deflection compensation
Crowning helps improve angle consistency across long workpieces and is particularly valuable for 4000 mm, 5000 mm, and 6000 mm bending applications.
Selecting the right tooling is just as important as selecting the machine itself.
Tooling options may include:
Different punch profiles can be selected according to bending angle, flange shape, clearance, and workpiece geometry.
The V-die opening should be selected according to material thickness, material strength, bend radius, and required forming force.
Multi-V tooling provides several V openings in one die and can be useful for factories processing different material thicknesses.
High-tonnage bending applications require tooling with sufficient load capacity. The tooling and tool holder must be rated for the actual bending load instead of relying only on the nominal machine tonnage.
Custom tooling can also be supplied for special profiles and complex workpieces.
Mild steel is one of the most common materials processed on heavy-duty press brakes. Required tonnage varies according to thickness, bending length, and V-die opening.
Stainless steel generally requires greater bending force than mild steel of the same thickness. Proper tonnage calculation and tooling selection are therefore important.
Aluminum usually requires less bending force than steel, but attention should be paid to material grade, surface protection, bend radius, and cracking risk.
High-strength steel requires careful calculation because its higher tensile strength can significantly increase the required bending force and springback.
When selecting a 400 ton press brake, do not compare machines only by nominal tonnage.
Important specifications include:
| Specification | What to Consider |
| Nominal Force | 400 Ton |
| Bending Length | 3200 / 4000 / 5000 / 6000 mm or customized |
| Distance Between Columns | Must suit workpiece width |
| Throat Depth | Important for large or deep parts |
| Ram Stroke | Determines forming flexibility |
| Daylight | Important for tall tooling and complex parts |
| Backgauge | Select according to positioning requirements |
| CNC Axes | Choose according to part complexity |
| Crowning | Recommended for long precision bending |
| Tooling | Standard or customized |
| Safety System | According to production and market requirements |
| Control System | Selected according to automation needs |
A 400 ton metal bending machine is commonly used in industries that process large, thick, or high-strength metal parts.
Typical applications include:
Construction machinery
Heavy equipment manufacturing
Structural steel fabrication
Truck and trailer manufacturing
Agricultural machinery
Shipbuilding
Railway equipment
Industrial machinery
Large electrical cabinets
Energy equipment
Infrastructure components
General heavy metal fabrication
Choosing the correct tonnage helps avoid both insufficient capacity and unnecessary machine investment.
| Comparison | 300 Ton | 400 Ton | 500 Ton |
| Bending Force | 300T | 400T | 500T |
| Typical Application | Medium to heavy fabrication | Heavy fabrication | Very heavy fabrication |
| Long Plate Bending | Depends on configuration | Suitable for many heavy-duty applications | Higher reserve capacity |
| Machine Size | Smaller | Medium-large | Larger |
| Investment | Lower | Medium | Higher |
| Best Choice | Moderate forming requirements | Balance of force and flexibility | Very thick or high-strength workpieces |
A 400 ton press brake is often selected when 300 tons provides insufficient capacity but the application does not require moving to a significantly larger 500-ton machine.
The final choice should still be based on actual bending calculations.
A properly configured 400 ton CNC press brake machine provides several advantages for heavy fabrication:
High bending force for thick and long workpieces
CNC-controlled bending operations
Accurate backgauge positioning
Improved bending repeatability
Crowning compensation for long parts
Multiple CNC axis options
Flexible tooling configurations
Suitable for different materials and workpiece sizes
Custom machine configurations for specific projects
Instead of supplying only a standard machine, we can recommend a configuration according to your bending application.
As a 400 ton press brake manufacturer, we can configure the machine according to the customer's material, workpiece size, production process, and automation requirements.
Customization options can include:
Custom bending length
Increased throat depth
Increased daylight
Extended ram stroke
Multi-axis backgauge
CNC crowning
Special punches and dies
Heavy-duty tooling
Front support systems
Sheet followers
Safety protection systems
Automation integration
For special workpieces, send us your drawings and production requirements before ordering so that the machine and tooling can be matched to the actual bending process.
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Talk to our experts and we can help you meet all your product requirements from the beginning. Let us help you with your next project.
