The WYS Bystronic-type lower die holder is a press brake tooling accessory designed to increase the installed height of a lower die and provide stable support for interchangeable bottom tools.

When a standard lower die does not provide sufficient working height for the selected press brake setup, this holder raises the die to achieve the required tool installation height. The standard model has a 93 mm overall height and a 73 mm effective height.

The holder can accommodate different compatible lower dies with the corresponding mounting tang. This allows operators to change the V-opening, die angle or lower-tool profile without replacing the complete mounting assembly. By allowing several compatible lower dies to share one holder, the system can reduce tooling costs, shorten setup time and improve production efficiency.

The effective height, overall width and tool length can be customized according to the customer’s press brake, lower dies and finished-part requirements. Continuous lengths and segmented configurations are available for different bending applications.

Key Features

Bystronic-type lower die holder for press brake tooling
93 mm overall height
73 mm effective height
58 mm standard body width
Raises lower dies when additional installation height is required
Provides stable support and alignment for compatible lower tools
Accepts different interchangeable dies with a compatible mounting tang
Allows different V-openings, angles and die profiles to share one holder
Helps reduce lower-tool changeover time
Improves tooling flexibility and bending efficiency
Can reduce the need for multiple full-height lower dies
Precision-machined mounting surfaces for reliable positioning
Custom effective height, width and length available
Continuous and segmented versions available

Technical Specifications

Specification	Details
Product Type	Lower Die Holder / Bottom Tool Holder
Product Category	Press Brake Tooling Accessory
Tooling Style	Bystronic-Type
Overall Height	93 mm
Effective Height	73 mm
Standard Body Width	58 mm
Upper Mounting Slot	13 mm
Lower Mounting Tang	13 mm
Lower Tang Height	20 mm
Material	42CrMo Alloy Steel
Compatible Tools	Lower dies with a corresponding mounting tang
Available Lengths	Continuous or segmented
Customization	Effective height, width, slot, mounting profile and length
Main Functions	Height extension, die support and interchangeable die mounting

The permissible load capacity should be confirmed according to the holder dimensions, material, working length, mounting structure and the selected lower die.

Typical Applications

Increasing lower-tool installation height
Compensating for insufficient lower-die height
Achieving the required press brake shut-height configuration
Mounting different interchangeable single-V dies
Supporting lower dies with different V-openings
Changing die angles or profiles without replacing the complete holder
Creating flexible tooling setups for different workpieces
Reducing press brake setup and changeover time
Staged bending with compatible sectional lower dies
Use on compatible Bystronic-type CNC, hydraulic and servo-electric press brakes
Sheet-metal fabrication involving cabinets, enclosures, brackets and structural parts

Product Details / Manufacturing Quality

The lower die holder has an overall height of 93 mm, including a 20 mm-high lower mounting section. Its resulting effective height is 73 mm, providing additional elevation beneath the installed lower die.

The upper mounting slot is designed to receive a compatible lower-die tang. Different dies can therefore be installed on the same holder, provided that their mounting dimensions and rated loads are compatible. This modular tooling arrangement allows a factory to use different V-openings and die profiles without purchasing every lower die as a complete full-height tool.

Precision-machined mounting surfaces help maintain stable positioning and accurate alignment between the upper punch and lower die. Correct alignment is important for consistent bend angles, even load distribution and reduced risk of tooling damage.

The holder is manufactured from 42CrMo alloy steel for strength, toughness and resistance to deformation. The material, heat treatment, holder dimensions and permissible load can also be adjusted according to the intended bending application.

Efficient and Flexible Lower Tool Setup

Using a common lower die holder allows compatible dies to be changed more efficiently. Operators can select the appropriate V-opening or die profile for the current material and workpiece while retaining the same supporting holder.

This modular arrangement offers several practical advantages:

Fewer complete full-height dies may be required
Different V-openings can share the same holder
Tooling inventory can be simplified
Lower-die changeovers can be completed more efficiently
Custom-height setups can be achieved without manufacturing every die at the full installed height
Segmented dies can be arranged for staged bending when the setup permits

Standard & Custom Press Brake Tooling

WYS manufactures lower die holders, die adapters, height-extension holders, single-V dies, multi-V dies, punches, gooseneck tools, hemming tools and special forming tools for different press brake systems.

The effective height and overall width of this holder can be customized according to the press brake’s open height, shut height and lower-tool configuration. The upper slot, lower mounting tang and other interface dimensions can also be manufactured according to the customer’s existing tooling.

Tool length is available according to customer requirements. WYS can provide continuous holders, standard sections or custom segmented arrangements. Optional black oxide treatment and other surface-protection solutions are also available.

WYS provides a free tooling design service. Customers can send us their lower-die drawings, press brake specifications and required working height. Our engineering team will evaluate the mounting interfaces, centerline, working height and required capacity before recommending a suitable holder design.

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

BYSTRONIC Type Tooling

WYS Bystronic-Type Lower Die Holder, H93 mm

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

WYS 30° V6 Bystronic-Type Single-V Die, H120 mm

WYS 30° V12 Bystronic-Type Single-V Die, H120 mm

WYS 30° V32 Bystronic-Type Single-V Die, H120 mm

WYS 60° V50 Bystronic-Type Heavy-Duty Single-V Die, H120 mm