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TUBE BENDING
TUBE JOINT PREPARATION

Aviation Structural Mechanic (H&S) 3&2 - How airplanes are built and how to maintain them
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Figure 6-10.—Bending tubing with hand-operated tube bender. Hand Tube Bender The hand-operated tube bender, shown in figure 6-10, consists of a handle, radius block, clip, and a slide bar. The handle and slide bar are used as levers to provide the mechanical advantage necessary to bend tubing. The radius block is marked on degrees of bend ranging from 0 to 180 degrees. The slide bar has a mark that is lined up with the zero mark on the radius block. The tube is inserted in the tube bender, and after lining up the marks, the slide bar is moved around until the mark on the slide bar reaches the desired degree of bend on the radius block. See figure 6-10 for the six procedural steps in tube bending with the hand-operated tube bender. Mechanical Operated Tube Bender The tube bender, shown in figure 6-11, is issued as a kit. The kit contains the equipment necessary for bending tubing from 1/4 inch to 3/4 inch in diameter. This tube bender is designed for use with aircraft grade, high-strength, stainless-steel tubing, as well as all other metal tubing. It is designed to be fastened to a bench or tripod, and the base is formed to provide a secure grip in a vise. Figure 6-11.—Mechanical operated tube bender. 6-10







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