What is Tube Swaging & How Does it Work?
Tube swaging is a metal forming process, often carried out as cold working, used to precisely shape tubes, rods, and other cylindrical components. It alters the diameter or profile of the material without the need for welding or cutting, meaning no material is lost in the process. Unlike other methods, swaging forms the metal using a rapid succession of hammer strikes. It is widely regarded as a cost-effective technique for pointing, resizing, reshaping, tapering, and reducing metal parts such as tubing, rod, and wire.
What is Tube Swaging & How Does it Work?
Flaring is a cold forming process used to widen the end of a tube, typically to prepare it for a leak-tight connection with a fitting. In this process, a flaring tool, often shaped like a cone, is pressed into the end of the tube. The pressure causes the tube's end to expand outward into a conical shape, matching the angle of the tool. Flaring is a cold forming technique that does not result in the loss of material.
While swaging and flaring have lots of similarities, the main difference is that flaring is shallower and uses a different shape in its method. A funnel-like shape is created at the end of the tube during the flaring process whereas swaging expands the diameter further along the tube to create a flute shape.
Flaring is also used most commonly for softer materials like copper and aluminium whereas swaging is a good option for hard and soft materials. With this being said, it is possible to carry out flare tubing on harder materials but annealing may be required to make the end of the tube more malleable before starting the flaring process.
Swaging has many advantages over other metal forming methods which is why it's popular among multiple industries. Swaging can be applied to a diverse range of applications such as:
The Various Uses of Swaging
These physical attributes make mild steel a practical and cost-effective choice for everything from construction and automotive manufacturing to general engineering and custom fabrication.
Heavy-duty metal cables
Shaping pipes and tubes
Attaching fittings
Electronics
Durable pipes and fittings
Aeronautics
Automotive parts
Firearms
Building materials
Consumer products
Marine and Shipbuilding
Railway and Transit
Renewable Energy
Medical Devices
Advantages of Tube Swaging
Tube swaging offers a range of advantages that make it a preferred method in many manufacturing and engineering applications. One of the primary benefits is that it enhances tube strength through compression and shaping, resulting in more durable and resilient components. The process is also known for its high level of precision, as it ensures that all dimensions are changed precisely and accurately, making it ideal for applications where tight tolerances are critical.
Another key advantage is its versatility, allowing it to be applied to a variety of materials, including metals of different hardness and compositions. Additionally, swaging creates leak-proof and clean connections, which is especially important in industries such as aerospace, automotive, and plumbing where reliable sealing is essential.
From a cost perspective, tube swaging is more affordable than many other techniques used to form tubes, offering significant savings without compromising on quality. Lastly, the process results in smooth transitions along the tube, enhancing both the functionality and aesthetic appeal of the final product.
Types of Swaging
Swaging techniques vary depending on the material, shape, and intended application. Below are the main types of swaging used in industry:
Tube Swaging
Focused on tubing applications, this method adjusts the diameter or shape of tubes, often to form end connections or transitions.
- Produces leak-tight and smooth joints
- Used extensively in plumbing, hydraulics, and HVAC systems
Hydraulic Swaging
Hydraulic pressure is used to compress a fitting or sleeve onto a cable or tube. Unlike rotary swaging, this method doesn’t involve impact but relies on smooth, controlled force.
- Common in cable assemblies and pipe fittings
- Produces precise, strong and sealed joints
Cold Swaging
Carried out at room temperature, cold swaging reshapes the metal without heating. It increases material strength through work hardening.
- Suitable for precision components
- No heat distortion makes it ideal for close-tolerance parts
Hot Swaging
The workpiece is heated before swaging to make the material more ductile and reduce resistance to deformation.
- Used for hard metals or thick-walled parts
- Allows for greater reshaping with reduced risk of cracking
Rotary Swaging
Also known as radial swaging, this is the most widely used form. It involves a set of dies arranged in a circular pattern that strike the workpiece radially as it is fed through the machine. The dies rapidly open and close, hammering the tube or rod into the desired shape.
- Radial swaging reduces diameter and forms tapers or stepped profiles
- Excellent for tubes, rods, and solid components
- Ideal for producing uniform, concentric parts without material loss
Our Tube Swaging Services
At Elite Tube, our swaging expertise supports several specialised industries. We work closely with clients across the automotive, rail, and furniture sectors, offering customised swaging solutions precisely aligned with their unique requirements. Whether you need tubes in varying lengths or specific dimensions, our experienced team collaborates with you from the outset. We’ll discuss your chosen materials - be it steel, aluminium, or other suitable alloys - and exact tube dimensions before beginning the process.