Products

Tube bending tools from the experts

Tube bending tools made from aluminum bronze, tool steel or technical plastic

Tube bending is a key manufacturing process in numerous branches of industry, including the car manufacturing, plant engineering, medical technology, manufacture of musical instruments, and the furniture and construction industries. All of these require high dimensional accuracy, reproducible quality and perfect surface and cross-section geometry. High-performance tube bending tools are essential for this.

ALBROMET offers a comprehensive range of high-quality bending tools for all applications. All tools, whether bending mandrels, wiper dies,

bending dies or rollers, as well as pressure and clamping dies, are produced in-house. With modern design tools, collision checks in the CAD system and our many years of experience, we ensure that you receive the tools that are perfectly matched to your bending task.

Rohrbiegewerkzeuge Metallhandel CNC Albromet 030

Rohrbiegewerkzeuge Metallhandel CNC Albromet 032

Rohrbiegewerkzeuge Metallhandel CNC Albromet 039

Rohrbiegewerkzeuge Metallhandel CNC Albromet 038

Rohrbiegewerkzeuge Metallhandel CNC Albromet 036

Rohrbiegewerkzeuge Metallhandel CNC Albromet 035

How you benefit from our bending tools

Bending with continuously high quality
Technical advice, design and production from a single source
Tools for (almost) all tube materials
Long service life thanks to optimized choice of material
Rapid availability in many sizes

Product overview

Bending mandrels

For pipes made of aluminum, steel, stainless steel, copper,
brass, titanium and coated metals
Segment mandrels, plug mandrels or spoon mandrels, etc., in many different shapes and sizes
Made of aluminum bronze or tool steel, with and without coating

Wiper dies (scraper)

Effectively prevent wrinkels from forming on the inner radius of the tube
Made of aluminum bronze, tool steel or plastic according to the tube material
Various designs, e.g. as a monoblock or wiper die insert
Matching wiper die holders available

Bending dies & Co

Bend dies, clamp dies, pressure dies
Manufactured from hardened tool steel according to customer drawing
All components from a single source

Our spare parts sets are helpful when servicing is required. Whether connecting links, mandrel connections or bending balls, all components of a bending mandrel can be quickly replaced as needed. This helps to minimize search times, incorrect orders or assembly errors. Sustainable and cost-effective.

Spare part-kits from stock:

Mandrels and coatings

Bend any tube with us

ALBROMET bending mandrels – developed for precise radii and the best bending results. Many years of experience guarantee ideal tool design and dimensioning. Material- and geometry-dependent factors such as tube material, wall thickness, bending radius and tube diameter, to name just the most important, are decisive.

Each pipe material has its own characteristics. Steel and stainless steel require high mandrel strength, while aluminum requires low-friction surfaces. Copper requires sensitive process control, while titanium demands uncompromising tool quality. Plastics, on the other hand, have their own specific requirements in terms of temperature control and mandrel material.

Each pipe material has special requirements:

Stainless steel (1.4301 / 1.4404): high strain hardening > stable mandrel support required
Aluminum (e.g. EN AW-6060): low strength but sensitive surface > polished or coated mandrels recommended
Copper pipes Ø early mandrel contact crucial
Titan (Grade 2 / 5): high spring back > Precise mandrel position and rigid segment chain required

Material recommendations for mandrels

Types of mandrels

Standard-Link-Mandrel (Segment mandrel)

Combines flexibility with dimensional stability
Return to original position thanks to spring force of the links
Homogeneous support because of cylindrical segments

Segment mandrel in sd design (small distance)

Ball spacing reduced by 40%
Larger contact surface during bending
Wrinkle-free bending of thin-walled pipes

Segment mandrel in xsd design (extra small distance)

Ball distance reduced by 80%
For extremely thin-walled tubes
For high-strength tube materials

Plug mandrel

For pipes with thick walls or large diameters
Ratio D/W < 20, ratio CLR/D > 3.0
Available in all kind of types

Spoon mandrel

3D-milled contour in the bending area with large contact surface for perfect bending results
For pipes with thick walls or large diameters
Ratio D/W < 20, ratio CLR/D > 3.0

Optimal lubrication

Lubrication is a crucial factor for high-quality mandrel bends in rotary draw bending. Depending on the tube material, oil, grease or paste is used to reduce friction between the pipe, mandrel and tool.

Correctly dosed lubrication on the mandrel and on the inside of the pipe prevents surface damage, scoring and increased tool wear. A high bending quality is ensured by a consistent flow of material in the pipe.

Types of lubrication using the example of a standard link mandrel:

External lubrication on the mandrel

Easy to implementation
Suitable for all lubricants (oil, grease, paste)

Internal lubrication

Suitable for automatic bending machines
Enables stable and reproducible bending processes
For low-viscosity bending gels or synthetic lubricants

Minimum-Quantity-Lubrication (MQL)

Low lubricant consumption
Lubricant supply near the bending area
Better lubricant distribution through compressed air feed of the fluid

Example of a plug mandrel

Mandrel internal lubrication is also available for fixed mandrels such as plug mandrels and spoon mandrels

Mandrels: Design and installation position

As a manufacturer of tube bending tools, we put highest emphasis on function and design. The bending process is simulated using CAD models and the mandrels are checked for function and collision. The size of the bending mandrel is defined by the outer diameter of the pipe.

Dimensions - Standard link mandrels

Wiper dies

The wiper die supports the pipe on the inside of the bend during bending and thus helps to maintain the shape and integrity of the pipe. It also minimizes the springback of the tube. The shape of the wiper die must be adapted to the desired pipe shape in order to effectively prevent deformation or or creasing of the pipe..

Different construction types

Wiper dies are particularly important when bending pipes with tight radii and/or thin walls thicknesses. Various designs are available. The material is selected to match the pipe material. ALBROMET offers all the materials and coatings mentioned.

Wiper die materials:

Spare part-kits and individual parts

Spare part-kits offer significant advantages when servicing is required. All necessary components are already fully assembled and pre-assembled, which eliminates search times, incorrect orders and installation errors. This significantly reduces the on-site workload and shortens machine downtime. At the same time, the standardized assembly ensures consistent quality and increases process reliability during maintenance and servicing.

Spare part-kits

Balls segments

The high-precision connecting links between the mandrel shaft and balls are made of heat-treated tool steel in premium-quality tool steel with extremely high strength. This increases service life and reduces maintenance requirements during use. Thanks to our in-house production and warehousing, we offer short delivery times and excellent value fopr money.