CHAPTER 3-
OPERATING INSTRUCTIONS (cont.)
Refer to the table to determine the correct cutting rod size for the target material
and type of work being performed.
3-2. ROD INSERTION.
a. Check to see that the collet in the torch assembly is the appropriate size to properly fit the rod
being used. To replace the collet, remove the collet nut and collet from the torch assembly. Make
sure the neoprene collet washer is in place and sized appropriately for the collet. Insert the desired
collet and replace the collet nut.
1) 3/16” collet is used with red washer.
2) 1/4” and 3/8” collets are used with black washer.
3) 1/2” collet is used with either white washer or black washer.
b. Ensure the plug valve is closed. Loosen the collet nut one-half turn. Do not remove the collet nut.
c. Insert the end of the cutting rod that has the recessed internal wires into the collet until it is firmly
seated against the collet washer.
d. While maintaining slight pressure, tighten the collet nut to lock the rod in place.
CUTTING ROD INSERTION
e. Open the plug valve fully.
f.
Depress the oxygen control lever to start the flow of oxygen. Check for leaks at the collet nut by
listening for escaping oxygen. If any leaks are encountered:
1) Make sure the cutting rod is firmly seated on the collet washer.
2) Re-tighten the collet nut assembly.
3) Inspect the cutting rod for damage.
4) Make sure correct size collet washer is being used. Inspect for damage and replace if
necessary.
