Tube & Pipe Bending Glossary Essential Terms and Definitions
by benderpartsseo@ · 27 things on Twos
- Tube & Pipe – This glossary defines the most important terms and abbreviations used in the tube and pipe bending industry. Whether you’re working with manual, hydraulic, or CNC benders, these definitions will help you interpret setup sheets, tooling specs, and machine settings accurately.
- Captive Lip
- A tooling design where the groove in the bend die and wiper die is deeper than the tube’s outer diameter.
- Used primarily with interlock tools in high-precision aerospace applications to minimize tool marks on ultra-thin wall tubing.
- Carbide Coating
- A surface treatment applied to the grip sections of the bend die and clamp die.
- Its purpose is to increase surface friction and prevent the tube from slipping during bending.
- CCW – Counter Clockwise
- Refers to the rotation direction of the swing arm on a rotary draw tube bending machine.
- CLH – Center Line Height
- Also known as left-hand rotation.
- The vertical distance from the base of the bending machine to the center of the tube groove on the bend die.
- CLR – Center Line Radius
- The radius measured along the tube’s centerline.
- It determines the curvature of the bend and is a critical parameter in tooling and machine setup.
- Specialized tooling for applications with very short DBB (Distance Between Bends).
- Compound Tooling
- The bend die grip section and clamp die are machined with the previous bend built in.
- Although costly, this approach is more practical than short grip sections in high-production bending.
- CW – Clockwise
- Describes the right-hand rotation of the swing arm on a rotary draw tube bender.
- D of Bend
- Formula:
- D=Center Line Radius (CLR)Tube Outside Diameter (OD)D = \frac{\text{Center Line Radius (CLR)}}{\text{Tube Outside Diameter (OD)}}D=Tube Outside Diameter (OD)Center Line Radius (CLR)
- Defines the relationship between bend radius and tube diameter. Lower ratios indicate tighter bends.
- DBB – Distance Between Bends
- Read more:- Tube & Pipe Bending Glossary Essential Terms and Definitions