For pipe: Schedule determines wall thickness. Wall thickness is the distance between the outside diameter and the inside diameter of the pipe measured in thousandths of an inch. The inside diameter (ID) is the longest distance across the inside dimensions of a tube or pipe. The outside diameter (OD) is the distance across the extreme outside dimensions of a tube or pipe. The software then uses the stretch/compression data to properly calculate the amount of material in each bend as well as the proper bend locations. This value is obtained using a calibration test, by bending a test piece of material and measuring the resulting legs. When using Bend-Tech Software, this value is used to specify how much stretching and compressing will occur during each bend. Because of this stretching, you will find that the CLR of a bent piece of material is slightly larger than the CLR listed on the die.Ĭalibrated Center-line Radius (Calibrated CLR): Material will spring or stretch open after it is bent think of coiling a wire around a pencil – release the wire and it will fall off the pencil. This value is the radius you obtain when bending with the die. The information in this table is based on a minimum of 36" lengths:įor questions regarding bend radius for our other tubing products or for more sizes, contact our team or call toll-free in the US 1-80 or +1-80 internationally today to see how we can develop a precision solution to give you a competitive advantage or to request prototyping samples.įor expanded details for bend radius, tubing sizes, and resins, please see our catalog.When choosing a die, factors that will affect the CLR you choose include the material type and grade to be bent, wall thickness, the OD, the application or design of the end product, and overall appearance required.Īchieved Center-line Radius (Achieved CLR): For those tubings, bend radius does not apply.Īs a representative example, the table below is presented using our PTFE Industrial Wall tubing (0.030″ wall thickness, except where noted) to illustrate bend radius determination. Note that not all of our tubing is flexible. As a general guide, we have performed a series of bend tests that we hope will guide you in determining the size that is most suitable for you. Zeus prides itself in its sample program where we work with companies to find the right material and perfect size. The bend radius is established primarily by three different factors: outside diameter (OD) of the tubing, wall thickness, and resin that the tubing is made from.
The question is often raised as to what the minimum bend radius is for a specific size of tubing.
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