Bender Sizing

Capacity Sizing

Selecting the right tube bender sizing is an important factor during the purchasing process. Several factors must be known:

  • Min/Max OD of tube

  • Min/Max wall thickness of tube for each size

  • Material specifications; Tensile Strength, Yield Strength, Yield Strength and Elongation percentage

These factors will determine the correct tube bender sizing for the application. The material specifications can be obtained from your material supplier.

If the tube bender machine sizing is too small, there may not be enough torque to make the bend or enough rigidity to keep the dies form flexing. For continuous production, the bender should not be operated above 75% capacity. A small amount of full capacity work is fine, but continuous production at full capacity is not recommended.

If the tube bender machine sizing is too large, then being able to control the process precisely enough becomes an issue. It’s like driving a finish nail with a sledge hammer, it can be done, but the results may not be what you want. Interference can become an issue with larger machines bending small tubes. Small tubes that have numerous bends are likely to interfere with a big machine frame.

The tube bending machine capacity sizing application will assist you in knowing the torque and section modulus of round shapes. This data can be used to as an estimate for determining the amount of power needed to make the bend and control the dies.

Example below:

Item Data Example Description
OD 3.5 Outside diameter of tube
Wall .065 Wall thickness
CLR 7 Centerline Radius of bend
Tensile 50000 Ultimate tensile strength – How much force before it breaks
Yield 45000 Average yield strength – How much force to bend
Elongation 29 Elongation percentage – How much it stretches

Contact us to help determine what will work the best for your application.