Description
The UNI 42 bending machine family is a compact, mobile and powerful solution for accurate pipe and tube bending in workshops, installation environments and on-site applications. Designed for professional use, the UNI 42 series combines a robust aluminium body with precise bending mechanics to produce constant bending radii and clean bending results, even when working with larger pipe diameters, thin-walled tubes or delicate materials.
The UNI 42 family is available in three main versions: a manual mechanical version, an electric version and a digital-electric version. This allows users to select the right machine configuration depending on the required level of automation, repeatability and production control.
The mechanic UNI 42 is a lightweight and reliable mechanical pipe bending machine for users who need a robust and easy-to-handle bending solution without electrical drive. With hardened steel gears running on ball bearings, it offers smooth operation, high mechanical strength and precise bending performance. Its compact dimensions and low weight make it especially suitable for mobile use, repair work, small workshops and flexible installation tasks.
Mechanic UNI 42 length: 400 mm/15,75 in, width: 200 mm/7,9 in, height: 250 mm/9,9 in (without stand)
Mechanic UNI 42 weight: 18 kg/39,7 lb (without stand)
The electric UNI 42 is designed for users who require more power, higher comfort and consistent bending performance. Equipped with an asynchronous motor, low-voltage electronic control, bending angle regulation, electrobrake and automatic return to stop, the UNI 42 A enables accurate and repeatable pipe bending with reduced physical effort. It is suitable for professional applications where clean bending results, dimensional accuracy and reliable operation are essential.
Electric UNI 42 length: 600 mm/23,7 in, width: 170 mm/6,7 in, height: 350 mm/13,8 in (without stand)
Electric UNI 42 weight: 35 kg/77,2 lb (without stand)
For applications requiring even higher repeatability and programmable bending sequences, the digital-electric UNI 42 provides an advanced digital electronic control unit with multilingual microprocessor. The digital version allows programming, control and recovery of the bending angle and can store up to 50 bending programs. Each program can include up to 9 sequential bending angles, making the machine ideal for recurring bending tasks, small series production and more complex tube geometries.
Digital-electric UNI 42 length: 600 mm/23,7 in, width: 170 mm/6,7 in, height: 350 mm/13,8 in (without stand)
Digital-electric UNI 42 weight: 35 kg/77,2 lb (without stand)
All versions of the UNI 42 family are designed to bend pipes and tubes with optimum and constant bending radii while minimizing pipe deformation. The maximum bending angle of up to 180° allows a wide range of bending applications in metalworking, plumbing, heating, hydraulic installations, industrial maintenance, machinery construction and assembly work.
Thanks to its compact construction, aluminium body and practical dimensions, the UNI 42 family is a strong choice for users who need a mobile pipe bending machine that remains accurate, durable and powerful in daily professional use. Whether operated manually, electrically or with digital program control, the UNI 42 series offers a reliable bending solution for precise pipe and tube forming.
Bending Capacity
The bending capacity for the UNI 42 familiy depends on the combination of the pipe's material, outside diameter and wall thickness. Softer materials and smaller diameters can usually be bent using less machine force, whereas high-strength steels, larger diameters and thicker walls require more robust tooling and higher torque. The achievable bending result also depends on the bending radius, the quality of the pipe and the use of suitable bending formers, counter rollers or mandrels. Therefore, capacity values should always be checked against the exact material grade, pipe size, and required bend geometry.
The maximal bending angle is 180°.
The standard bending radii are 3D and 4D.
Hard and Soft Copper Pipes, Annealed Brass Pipes
Hard and Soft Copper Pipes or Annealed Brass Pipes are especially suitable for bending applications because their soft, ductile material structure allows clean forming with reduced risk of cracking. Compared with harder pipe materials, annealed copper can usually be bent with lower force and tighter radii, depending on the pipe diameter, wall thickness and tooling used. For best results, the bending former should match the pipe size precisely to prevent flattening, wrinkling or deformation of the pipe cross-section. The actual bending capacity always depends on the specific copper grade, pipe dimensions and required bend geometry.
Maximal Diameter
The maximum pipe diameter describes the largest outside diameter a bending machine can process under defined conditions.
The maximal diameter for hard and soft copper pipes or annealed brass pipes is 42 mm/1,65354 in.
Maximal Wall Thickness
The maximum wall thickness indicates the thickest pipe wall a bending machine can form within its rated capacity.
The maximal wall thickness for hard and soft copper pipes or annealed brass pipes is 1,5 mm/0,0590551 in.
Steel pipes for electrical installations
Steel pipes for electrical installations are commonly used where cables and wiring require strong mechanical protection. Due to their higher strength compared with softer pipe materials, they usually require greater bending force and accurately matched tooling to achieve clean, consistent bends. The bending result depends on the outside diameter, wall thickness, steel grade and protective surface finish, such as galvanising or coating. Properly selected bending formers help prevent flattening, kinking or damage to the pipe surface, ensuring that the conduit remains suitable for safe and reliable cable routing.
Maximal Diameter
The maximum pipe diameter describes the largest outside diameter a bending machine can process under defined conditions.
The maximal diameter for steel pipes is 40 mm/1,5748 in.
Maximal Wall Thickness
The maximum wall thickness indicates the thickest pipe wall a bending machine can form within its rated capacity.
The maximal wall thickness for steel pipes is 1,5 mm/0,0590551 in.
Stainless Steel AISI 304/316 Pipes
Stainless steel AISI 304 and 316 pipes are used where high corrosion resistance, durability and a clean surface finish are required. Due to their strength and work-hardening behaviour, these materials place higher demands on the bending machine, tooling and bending process than softer metals. The achievable bending capacity depends on the outside diameter, wall thickness, material grade and required bending radius. Precisely matched bending formers and suitable counter supports are essential to reduce ovalisation, surface marking and deformation, especially when tight radii or visible-quality bends are required.
Maximal Diameter
The maximum pipe diameter describes the largest outside diameter a bending machine can process under defined conditions.
The maximal diameter for stainless steel pipes is 30 mm/1,1811 in.
Maximal Wall Thickness
The maximum wall thickness indicates the thickest pipe wall a bending machine can form within its rated capacity.
The maximal wall thickness for stainless steel pipes is 2 mm/0,0787402 in.
Hydraulic Steel Pipes ST. 35,4
Hydraulic steel tubes ST 35.4 are designed for demanding hydraulic and fluid power applications where dimensional accuracy, pressure resistance and reliable forming behaviour are important. Their material strength and wall thickness require sufficient bending force and precisely matched tooling to produce clean bends without kinking, flattening or excessive ovalisation. The achievable bending capacity depends on the tube diameter, wall thickness, material condition and required bending radius. For hydraulic lines, careful bending is especially important to maintain the internal cross-section and ensure safe, consistent flow performance.
Maximal Diameter
The maximum pipe diameter describes the largest outside diameter a bending machine can process under defined conditions.
The maximal diameter for hydraulic steel pipes ST. 35,4 is 42 mm/1,65354 in.
Maximal Wall Thickness
The maximum wall thickness indicates the thickest pipe wall a bending machine can form within its rated capacity.
The maximal wall thickness for hydraulic steel pipes ST. 35,4 is 3 mm/0,11811 in.
Furniture Tubes
Furniture tubes are used in visible structural and design applications where precise bends, clean surfaces and consistent geometry are especially important. Depending on the material, diameter and wall thickness, they can be formed into frames, supports, handles or decorative elements for furniture and interior fittings. Suitable bending tools are essential to avoid surface marks, flattening, wrinkles or deformation of the tube cross-section. The achievable bending capacity depends on the tube dimensions, material grade, surface finish and required bend radius, particularly when high visual quality is required.
Maximal Diameter
The maximum pipe diameter describes the largest outside diameter a bending machine can process under defined conditions.
The maximal diameter for furniture pipes is 42 mm/1,65354 in.
Maximal Wall Thickness
The maximum wall thickness indicates the thickest pipe wall a bending machine can form within its rated capacity.
The maximal wall thickness for furniture pipes is 3 mm/0,11811 in.
FE Boiler Pipes
FE boiler pipes are used in heating, boiler and thermal systems where reliable performance under temperature and pressure is essential. Due to their steel-based material properties, they require sufficient bending force and accurately matched tooling to achieve controlled bends without kinking, flattening or weakening the pipe structure. The bending capacity depends on the outside diameter, wall thickness, steel grade and required bending radius. Clean, precise bending is especially important for boiler pipework to maintain flow reliability, installation accuracy and long-term operational safety.
Maximal Diameter
The maximum pipe diameter describes the largest outside diameter a bending machine can process under defined conditions.
The maximal diameter for FE boiler pipes is 42 mm/1,65354 in.
Maximal Wall Thickness
The maximum wall thickness indicates the thickest pipe wall a bending machine can form within its rated capacity.
The maximal wall thickness for FE boiler pipes is 3 mm/0,11811 in.
Aluminium Pipes
Aluminium pipes are lightweight, corrosion-resistant and well suited for many bending applications where low weight and clean forming results are important. Compared with steel, aluminium generally requires less bending force, but it can be sensitive to surface marks, flattening and cracking if the tooling or bending radius is not properly selected. The achievable bending capacity depends on the aluminium grade, outside diameter, wall thickness and required bend geometry. Precisely matched bending formers and careful process setup help maintain the pipe shape and produce smooth, consistent bends.
Maximal Diameter
The maximum pipe diameter describes the largest outside diameter a bending machine can process under defined conditions.
The maximal diameter for aluminium pipes is 42 mm/1,65354 in.
Maximal Wall Thickness
The maximum wall thickness indicates the thickest pipe wall a bending machine can form within its rated capacity.
The maximal wall thickness for aluminium pipes is 3 mm/0,11811 in.
Gas Pipes UNI 5745
Gas pipes UNI 5745 are used for gas installation applications where reliable dimensional accuracy, safe forming behaviour and a clean internal cross-section are essential. Due to the functional requirements of gas lines, the bending process must avoid kinking, flattening or excessive ovalisation that could restrict flow or affect installation quality. The achievable bending capacity depends on the pipe diameter, wall thickness, material grade and required bending radius. Properly matched bending formers and careful machine setup help ensure consistent bends while maintaining the integrity and usability of the pipe.
Maximal Diameter
The maximum pipe diameter describes the largest outside diameter a bending machine can process under defined conditions.
The maximal diameter for gas pipes UNI 5745 is 1"1/4.
Maximal Wall Thickness
The maximum wall thickness indicates the thickest pipe wall a bending machine can form within its rated capacity.
The maximal wall thickness for gas pipes UNI 5745 is standard.
Double Coated Aluminium Pipes for Sanitary Use
Bending double coated aluminium pipes require careful handling during bending because both the pipe material and the protective surface layers must remain intact. Aluminium is generally lightweight and formable, but the achievable bending result depends strongly on the pipe diameter, wall thickness, coating structure and bending radius. Suitable bending formers and clean tooling are especially important to avoid surface marks, coating damage, ovalisation or wrinkles. For reliable results, the bending capacity should always be checked according to the exact pipe dimensions, aluminium grade, coating type and required bend geometry.
Maximal Diameter
The maximum pipe diameter describes the largest outside diameter a bending machine can process under defined conditions.
The maximal diameter for double coated aluminium pipes for sanitary use is 50 mm/1,9685 in.
Maximal Wall Thickness
The maximum wall thickness indicates the thickest pipe wall a bending machine can form within its rated capacity.
The maximal wall thickness for double coated aluminium pipes for sanitary use is standard.