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Threading The Tubing
1. Start with tubing that has been coned, either in a lathe, or with a BuTech hand coning tool or
power coning tool.

2. Secure tube in a tube vise, with no more than the recommended length of tubing extending
beyond the face of the vise. (see chart below)

3. Lubricate the end of the tube and slide on the threading tool.

4. Take a firm grip on the handles of the tool and, with a steady pressure, turn the tool
counter-clockwise. Approximately every half turn of the tool, reverse direction to break off and
remove chips. Important: Apply lubricant frequently and liberally throughout the cutting
operation.

5. Continue threading until the proper length of thread is reached. Remove tool from the tubing
end.

Important: Clean the chips from the die and body of the tool before threading the next tube.

Tube Size
Threading Tools
Tool
Spare Dies
1/4"
3/8"
9/16"
THT4H
TD4
THT6H
THT9H
TD6
TD9
Bushings
TB4
TB6
TB9
Connection
A Thread
B
1/4"
3/8"
9/16"
1/4"-28
3/8"-24
9/16"-18
0.56" (14.2)
0.75" (19.1)
0.94" (23.9)
C
0.125" (3.2)
0.219" (5.6)
0.281" (7.1)