TRUMPF Type V4 84° Narrow Single-V Press Brake Lower Die – 100 mm Working Height, 40 Ton/m

Key Features

• TRUMPF Type narrow single-V lower die
• V4 die opening for very small V-opening applications
• 84° die angle for controlled precision bending
• 120 mm overall height
• 100 mm working height
• 12 mm narrow load-bearing width
• Narrow working section provides additional workpiece clearance
• Particularly suitable for thin sheet metal
• Suitable for very small flange dimensions
• Helps reduce lower-die interference with nearby formed sections
• Suitable for compact and geometrically restricted parts
• 40 ton/m load capacity
• Suitable for precision CNC press brake bending
• Manufactured from 42CrMo alloy steel
• Precision-machined V-opening and critical working surfaces
• V-opening, angle, height, width, load-bearing section, length, and mounting structure can be customized
• Available in TRUMPF Type, WILA Type, LVD Type, AMADA Type, BYSTRONIC Type, and other customer-specified structures
• Free press brake tooling design service available

Technical Specifications

---

Typical Applications

This TRUMPF Type V4 84° narrow single-V lower die is designed for applications requiring a very small V-opening and a compact working section.

Typical applications include:

• Thin sheet metal bending
• Small flange bending
• Precision air bending
• Small sheet metal components
• Compact enclosure parts
• Electrical cabinet components
• Precision brackets
• Small channels and profiles
• Workpieces with closely positioned bends
• Previously formed parts
• Components requiring additional lower-die clearance
• Precision CNC press brake production

The combination of a V4 opening and 12 mm narrow load-bearing section makes this model particularly useful where both a very small forming geometry and improved workpiece clearance are required.

---

V4 Opening for Very Small and Precise Bending

The V4 opening is the main forming characteristic of this lower die.

Compared with V8, V10, V12, or V16 dies, the V4 opening provides a much more compact forming geometry.

This can be especially useful when the workpiece requires:

• Very small flange dimensions
• Thin material support
• Relatively small inside bend radii
• Closely spaced bend lines
• Compact component geometry
• Precision forming of small parts

A smaller V-opening can improve support for thin material and allow smaller flange dimensions, but it also increases the bending force required for the same material thickness.

For this reason, V4 should be selected according to the complete bending condition rather than simply choosing the smallest available die.

---

12 mm Narrow Load-Bearing Width for Workpiece Clearance

The second important characteristic of this model is its 12 mm load-bearing width.

The working section is narrower than the surrounding lower-tool structure, intentionally creating additional space around the bending area.

This type of geometry is useful when the workpiece has:

• Nearby flanges
• Previously formed sections
• Limited internal space
• Closely positioned bends
• Small channels
• Compact profiles
• Complex surrounding geometry

A conventional wider lower die may contact an existing flange before the next bend can be completed.

The narrower load-bearing section helps:

• Increase clearance around the bend line
• Reduce tool-to-workpiece interference
• Improve access to compact workpieces
• Support more flexible bending sequences
• Accommodate previously formed components

This makes the tool more than simply a V4 die—it is also a clearance-oriented small V lower die.

---

V4 + Narrow Structure for Small Workpieces

The combination of the two structural characteristics is what differentiates this model:

V4 Opening
provides very compact forming geometry.

12 mm Narrow Load-Bearing Section
provides additional surrounding clearance.

Together, they create:

Small V Opening + Small Flange Capability + Workpiece Clearance

This makes the die particularly suitable for customers manufacturing small, thin, or geometrically restricted sheet metal components.

Compared with a standard-width V4 lower die, the narrowed working section can provide greater flexibility during multi-step bending.

---

84° Die Angle for Controlled Bending

This lower die uses an 84° V angle.

The slightly acute geometry can provide additional process flexibility where material springback or controlled overbending must be considered.

The final workpiece angle depends on:

• Punch angle
• Punch radius
• Material type
• Material thickness
• V-opening
• Material springback
• Applied bending force
• Press brake settings

For this reason, the V4 84° die should be selected together with the appropriate upper punch and required finished workpiece geometry.

---

40 Ton/m Load Capacity

This model has a rated maximum load capacity of 40 ton/m.

Because V4 is a very small V-opening, the bending force can increase rapidly as material thickness increases.

Correct tonnage calculation is therefore especially important.

The required force depends on:

• Material tensile strength
• Sheet thickness
• Bending length
• V-opening
• Punch radius
• Bending method
• Required final angle

The actual force must remain within the rated capacity of the:

• Upper punch
• Lower die
• Press brake machine

For thicker material or higher-load applications, a larger V-opening is generally more appropriate.

---

Product Details & Manufacturing Quality

The lower die is manufactured from 42CrMo alloy steel, providing strength, toughness, and durability for repeated precision bending applications.

The V-opening, working edges, locating surfaces, and mounting areas are precision machined to maintain dimensional consistency.

For a very small V-opening such as V4, machining accuracy is especially important because small dimensional deviations can significantly affect:

• Bend radius
• Bending force
• Material positioning
• Final bending angle
• Repeatability

Particular attention is also given to the 12 mm narrow load-bearing section, which must provide useful workpiece clearance while maintaining sufficient structural strength.

The combination of:

V4 + 84° + 12 mm Narrow Working Section + 40 Ton/m

creates a specialized lower die for thin-sheet, small-flange, and clearance-sensitive bending applications.

---

Standard & Fully Customizable TRUMPF Type Lower Dies

We manufacture both standard TRUMPF Type lower dies and fully customized press brake tooling.

The dimensions shown here represent only one available configuration and do not limit our manufacturing capability.

Customers can customize:

• V-opening
• Die angle
• Overall height
• Working height
• Load-bearing width
• Overall tooling width
• Working length
• Segmented lengths
• Bottom mounting structure
• Centerline position
• Clearance geometry
• Special relief areas
• Reinforced sections
• Machine-specific dimensions

We can also manufacture corresponding tooling configurations for:

• WILA Type
• LVD Type
• AMADA Type
• BYSTRONIC Type
• Other customer-specified tooling systems

Customers can send us their workpiece drawing, material type, material thickness, existing tooling drawing, machine specifications, or required bending result, and our engineering team can provide a free tooling design and sheet metal bending solution.

---

Free Tooling Design for Clearance-Sensitive Workpieces

For small and complex parts, selecting the correct V-opening is only part of the tooling design.

A die may have the correct V-opening but still interfere with the workpiece because the surrounding tooling body is too wide.

For this type of application, WYS Machinery can evaluate:

Workpiece Geometry
→ Material Thickness
→ Minimum Flange Length
→ Required Inside Radius
→ V-Opening
→ Clearance Requirement
→ Load-Bearing Width
→ Required Bending Force
→ Final Custom Tooling Design

This allows the lower die to be designed around the actual workpiece instead of forcing the workpiece to fit a standard lower-tool profile.