The WYS 28° heavy-duty Bystronic-type straight punch is designed for acute-angle bending, pre-bending and other demanding sheet-metal forming applications. It has an overall height of 250 mm, a slim 20 mm body, an R3 tip radius and a maximum load capacity of 140 ton/m.

Many Bystronic-type punches can be installed in two orientations, allowing operators to select different front- and rear-side clearance profiles. However, this straight punch has an essentially symmetrical working body, so reversing its mounting direction does not provide a different clearance advantage.

For this reason, the upper clamping tang uses a simplified reinforced design instead of the conventional reversible profile. This structure increases the effective load-bearing area around the clamping section, improves rigidity and contributes to the punch’s 140 ton/m load capacity.

The tall 250 mm profile provides extended working reach, while the narrow 20 mm body helps maintain clearance during deep or complex bending operations. Its 28° acute-angle tip can be used for sharp-angle forming and pre-bending processes, including applications where the workpiece will subsequently be flattened or hemmed with suitable tooling.

Key Features

Heavy-duty Bystronic-type straight punch
28° acute working angle for sharp-angle forming
250 mm overall height provides extended working reach
Slim 20 mm body supports clearance in deep bending operations
R3 tip radius offers strength and controlled bend formation
High maximum load capacity of 140 ton/m
Simplified reinforced clamping tang increases the load-bearing section
Straight profile provides equivalent clearance in either orientation
Increased rigidity around the upper mounting area
Suitable for acute bending and pre-hemming applications
Manufactured from high-strength 42CrMo alloy steel
Custom angles, radii, heights and sectional lengths available

Technical Specifications

Specification	Details
Tool Type	Straight Punch / Acute-Angle Upper Tool
Tooling Style	Bystronic-Type Press Brake Tooling
Punch Angle	28°
Tip Radius	R3
Overall Height	250 mm
Total Tool Width	20 mm
Maximum Load	140 ton/m
Clamping Structure	Simplified Reinforced Clamping Tang
Mounting Characteristic	Equivalent clearance in either orientation
Material	42CrMo Alloy Steel
Hardness	HRC54 ± 2
Main Advantage	High load capacity and extended working reach
Customization	Angle, radius, height, width, finish and sectional length

Typical Applications

Acute-angle sheet-metal bending
Pre-bending before flattening or hemming
Forming narrow V-shaped profiles
Producing sharp bends in industrial sheet-metal components
Deep bending operations requiring a tall, slim punch
Cabinet, enclosure and general metal-fabrication applications
Medium- and heavy-duty forming within the rated 140 ton/m capacity
Use on compatible Bystronic-type hydraulic, CNC and servo-electric press brakes

The actual bending capacity depends on the sheet material, tensile strength, thickness, die opening, bending method and working length. The calculated bending force should always remain within the rated capacity of both the punch and die.

Product Details / Manufacturing Quality

This punch differs from many conventional Bystronic-type upper tools in the design of its clamping tang. Asymmetric punches may be mounted in opposite orientations to provide different front- and rear-side clearance. Since this straight punch offers essentially the same clearance in both directions, a reversible asymmetric mounting profile is unnecessary.

The simplified clamping design retains more material in the upper load-transfer area. This creates a stronger load path between the press brake ram and the punch body, improving rigidity and supporting a maximum load capacity of 140 ton/m.

Its 250 mm height provides additional working reach for deep components, while the narrow 20 mm body helps reduce interference with the workpiece. The R3 tip offers greater strength and durability than a very small-radius acute punch, making it suitable for demanding production environments.

Manufactured from 42CrMo alloy steel, the tool provides high strength, toughness and resistance to deformation. Precision machining and controlled heat treatment help maintain mounting accuracy, consistent punch geometry and repeatable bending performance.

Standard & Custom Press Brake Tooling

WYS manufactures standard and custom straight punches, gooseneck punches, acute-angle punches, dies, hemming tools, radius tools, adapters and special forming tools for different press brake systems.

The punch angle, tip radius, overall height, body width, clamping profile and sectional arrangement can be customized. Optional black oxide treatment, continuous lengths and segmented tooling sets are also available according to the customer’s production requirements.

WYS provides a free tooling design service. Customers can send us their finished-part drawings, sheet thickness, material grade, bending length and press brake specifications. Our engineering team will evaluate the required bending force, tooling clearance and forming sequence before recommending an appropriate solution.

This product is manufactured by WYS for compatible Bystronic-type tooling and clamping systems. WYS is an independent press brake tooling manufacturer, and no official affiliation with the referenced machine brand is implied.

BYSTRONIC Type Tooling

WYS 85° High-Profile Bystronic-Type Gooseneck Punch, H250 mm, R3

WYS 85° Bystronic-Type Gooseneck Punch, H220 mm, R2

WYS 28° Heavy-Duty Bystronic-Type Straight Punch, H250 mm, R3