Make a light line at the point where the
tube must be cut and allow for bend radius if required.
Place the tube to be cut into the cutter
and tighten the adjusting screw just until the cutting
wheels and the rollers touch the tube.
The cutting wheel must touch the exact
line where the tube is to be cut.
Slightly tighten the adjusting screw and
rotate the cutter toward its open side, as shown in figure
Figure 4-116. Cutting Tube with Tube Cutter
As the tube is being cut, slowly
adjust the cutting wheel.
Adjust the cutting wheel slowly, and only
while the cutter is being rotated, in order
to avoid forcing the tube out of round.
After the tube is cut, remove the
burr on the inside with the reamer on the back of the
tube cutter or with a burnishing tool.
Clean all metal particles from the inside
of the tube.
Care. Observe the following practices for the
care and upkeep of pipe and tube cutters:
Clean and lightly oil the cutter wheel,
roller guides, and the adjusting screw.
Store in a rack or a box which protects the
4-24. Tube Benders. The tube bending tool shown in
figure 4-117 is used for bending a tube so that it can be
routed as required through an aircraft or a piece of
Figure 4-117. Tube Bender
Description. This type of tube bender usually
comes in individual sizes of 3/16, 1/4, 5/16, 3/8, and
7/16 inches. It is marked from 0 to 180 degrees of
bend, which permits accurate bending to a specific
Use. The following steps provide procedures for
bending tubing (see figure 4-118):
Raise slide bar upward and insert the
tubing to be bent.
Raise the locking clip and lock the tubing
Lower the slide bar until it rests on the
tubing. The zero mark on the slide bar should match up
with the zero mark on the block.
If a tube has multiple bends, ensure that
each bend is made in the correct direction
in relation to the others.