ACQ: Aircraft Quality. Highest degree of, fit, finish, and characteristics in a tool set.
Actuation: Vertical compression process to contain tube using nut or hydraulic cylinder. Normally used for bending squares and rectangles.
Ampco: Material wear surface for bending Stainless, used for mandrels and wiper dies.
Captive Lip: Added depth in bend die tube groove to contain neutral plane (top & bottom) of tube.
CLH: Center Line Height is an established distance from the bottom of the bend die to the center line of the tube groove.
Close Pitch: Type of ball string that uses one size smaller link size ( shorter pitch) in order to have more balls in the same amount of space.
CLR: Center line radius.
CNC V.S. NC: CNC, Computer Numeric Control of the tube in all axis of movement. (X, Y, Z,). NC, Numeric control of only the degree of bend.
Cross Section: Sectioned shape of material viewed from the end.
"D" of Bend: CLR / OD = "D" of bend
DBB: Distance Between Bends is the straight section of the tube from tangent to tangent.
Degree of Bend: Measurement of Bend Angle.
Direct Acting Pressure Die: Clamping method using a hydraulic cylinder without the use of any toggle linkage.
DOB: Degree of Bend is the measurement of the bend angle.
E-B Factor: (OD /Wall) / (CLR/OD) = E-B Factor
(Empty Bend Factor)
E-Plane: Bending direction of a cross section done the Easy way.
Ferrous: Mild Steel, Alloy Steel, Stainless Steel.
Gauge: Tube / Pipe wall thickness by established gauge size.
Grip Finish: The typically rough finish applied to tube grooves that grip a tube.
HDCL: Heavy Duty Chain Link. Type of linkage system that uses chain links and pins.
H-Plane: Bending direction of a cross section done the Hard way.
Interlock Dimension: Vertical slot width distance in bend die.
ISR: Inside radius.
Krolon: Proprietary wear surface coating developed by TFB for mandrel and wiper dies.
Multi-Radius: Type of tube groove in the bend die or pressure die that prohibits use of a mandrel.
Multi-Stack: Refers to a machines ability to have more than one bend die stacked on it.
Non-Ferrous: Aluminum, Brass, Copper, Titanium, Inconel.
OD: Outside diameter of work piece.
OSR: Outside radius.
Overhead Clamp: Clamping system mounted on the bend die that pivots down to grip the tube, typically there is no swing arm on the machine.
Pipe Size V.S. Tube Size: Two different methods for defining the OD of a tube:
Quadrant Data: Three dimensional intersecting point coordinates, to determine a tubular shape.
Reverse Interlock: Horizontal slot in bend die to center bending force of clamp and pressure dies.
Rotation: Swing arm direction of tube bender viewed from above. (CW or CCW)
Shoes: Another term used for a Wiper die.
Single Finger: Same as Single Leaf.
Single Leaf: Horizontal metal plates bolted to the clamp and pressure dies, that provide vertical compression of tube.
Single Plane Brute: Type of linkage system using yoke and pin.
Stroke Restrictor: Ring clamp attaching to the shaft of the hydraulic cylinder that moves the clamp and pressure die. The thickness of this ring clamp limits the travel of the tool preventing machine collision with the tube or tools.
Tangent: The beginning and ending of an arc or bend.
True Oval V.S. Flat Oval: True Oval, does not have a flat surface, and are also elliptical in shape. Flat Oval, has two parallel flat surfaces connected by an arc.
Ultra Close Pitch: Type of ball string that uses two sizes smaller link size (shorter pitch) in order to have more balls in the same amount of space.
Wall Factor: OD / Wall = Wall Factor
Wall: Tube / Pipe wall thickness.
Waveguide: Tubular system with exact inside tolerances to transport microwaves.