its open side (fig. 10-29). As the cutter is rotated, adjust
the tightening knob after each complete turn to
maintain light pressure on the cutting wheel.
PERMASWAGE CHIPLESS CUTTER.--
Select the chipless cutter according to tubing size.
Rotate cutter head to accept tubing in cutting position.
Check to ensure the cutter ratchet is operating freely
and the cutter wheel is clear of the cutter head opening
(fig. 10-30).
Center the tubing on two rollers and cutting blade.
Use the hex key provided with the kit to turn the drive
Figure 10-30.--Permaswage chipless cutter.
screw in until the cutter wheel touches the tube. Tighten
the drive screw one-eighth to one-fourth turn. Do not
overtighten the drive screw. Overtightening can
damage soft tubing or cause excessive wear or breakage
of the cutter wheel in hard tubing. Swing ratchet handle
back and forth through the available clearance until
there is a noticeable ease of rotation. Avoid side force
on cutter handle. Side force will cause the cutter wheel
to break. Tighten the drive screw an additional
one-eighth to one-fourth turn, and swing ratchet handle
back and forth, retightening drive screw as needed until
Figure 10-31.--Properly deburred tubing.
cut is completed.
If neither tube cutter (standard or Permaswage) is
may be used to remove burrs from inside of tubing.
available, a fine-tooth hacksaw should be used to cut
Select deburring tool and stem subassembly (fig.
tubing. A convenient method for cutting tubing with a
10-32) required for the size of tubing to be deburred.
hacksaw is to place the tube in a flaring block and the
Lubricate the sliding collar on the end of elastic plug
clamp block in a vise. After cutting the tube with a
with light oil if necessary to get free movement. Engage
hacksaw, remove all saw marks by filing the tube.
threads and insert stem subassembly into cutter end of
deburring tool by depressing the plunger, and screw
Tube Deburring
stem subassembly into plunger until it bottoms and
fingertightens. Check assembly deburring tool.
After you cut the tubing, remove all burrs and sharp
Depress plunger and the plug. Outside diameter should
edges from inside and outside of tube (fig. 10-31) with
be reduced to the same diameter as metal support collar
deburring tools. Clean out tubing. Make sure that no
on either end of elastic plug. Release plunger. Two
foreign particles remain. A Permaswage deburring tool
distinct circumferential bumps will appear on elastic
plug beyond outside diameter of metal support collars.
Check the tube end for squareness. Check the elastic
plug for wear and cleanliness. Replace worn or
damaged elastic plug. Clean and lightly lubricate
elastic plug with lubricant compatible to hydraulic fluid
to be used in tubing. Grasp deburring tool in one hand
with two fingers on collar and thumb on plunger.
Depress plunger with thumb and insert elastic plug into
Figure 10-32.--Permaswage deburring foot (typical).
Figure 10-29.--Standard tube cutter.
10-30
