• Pipe diameter.
• Centerline radius or bend radius
• Material of pipe to be bend.
• Wall thickness of the pipe to be bent.
• Machine mounting drawing

• Pulley in Bending Tools: Guides and assists the movement of the tube or pipe during the bending process.
• Distributes bending force evenly across the material for smooth and precise bends.
• Reduces wear on the tube or pipe while maintaining control over the bending path.
• Defines the CLR (Centerline Radius), which is the radius of the bend relative to the tube’s centerline, affecting the bend’s geometry and tightness.

It is used for clamping the part before initiating the bending on a pipe bender tool.

The purpose of a clamp is to grip the pipe and hold the same till the bending operation is done. For gripping serration is provided in the griping area to hold the pipe, serration can be of many types like circular serration, linear serration, thread type serration, negative serration etc.

Is also known as booster die, slider die. The purpose of a pressure die is to maintain the pressure on the pipe while bending process is being done. Opposite from clamp it allows pipe to slip and follow the tube bender die to support the pipe for bending. Many things depend upon the pressure die as follows.

It depends. The factors that determine whether a tube is strong enough to be bent without a mandrel are tube diameter, wall thickness, centerline radius, degree of bend, and tubing material. With this information we can accurately determine whether or not you need a mandrel for your job

A mandrel is used to prevent the outer pinching of the pipe. This helps in maintaining the roundness of the pipe’s outer periphery. There are many types of mandrels as follows

• Bullet or Plug Mandrel
• Ball Mandrel
• Chain Mandrel
• Wire Mandrel

Plug mandrel is a mandrel a mandrel that does not require a ball assembly.

A ball mandrel is a tool used in pipe bending to support the inside of a pipe during the bending process.

 The ball mandrel consists of a steel rod with a spherical ball at one end, which is inserted into the pipe being bent. The ball helps to distribute the pressure of the bending process evenly throughout the inside of the pipe, preventing it from collapsing or wrinkling.

The use of a ball mandrel in pipe bending is important because it helps to ensure the accuracy and quality of the bend. Without a mandrel, the inside of the pipe can collapse or deform during the bending process, leading to a distorted and unusable final product. The ball mandrel provides support for the inside of the pipe, ensuring that it retains its shape and dimensions during the bending process.

• It is especially used when the id of the pipe is very small(less than 20 mm) and the wall thickness is also very less(.2 to .4)
•  The reason why this wire mandrel is used is that link mandrel for such small diameter does not give a good life and breaks often.
• This gives a smooth outer surface( ie. a clean bending area at the outer side of the bend). attaching a picture of the assembled mandrel as well 

This is the one of the most important and critical part in the complete tube bender die. The purpose of the same is to prevent inner wrinkle in the pipe. It actually removes the void space between the mandrel and pipe bender die’s roller.

Like the mandrel, it depends. The primary purpose of the wiper to prevent the hump that forms at the end of the bend during the rotary-draw process from setting into a permanent wrinkle.