Tri Tool 620SB Clamshell Air - Manual (Page 31)

31
Model 620SB Low Profile Clamshell, Air
92-0220 : Rev. 131230
CUTTING SPEEDS
The chart shows the RPMs needed for Tool Bit surface cutting speed on the
surface of the pipe.
Cutting Speeds (approximate)
Pipe
Size
True Diameter
RPM for 200
in/min (508
cm/min)
RPM for 250
in/min (635
cm/min)
RPM for 300
in/min (762
cm/min)
20" 20.00" 508 mm 3 4 5
18" 18.00" 457 mm 3.5 4.5 5.5
16" 16.00" 406 mm 4 5 6
Use 200 surface inches per minute (508 surface centimeters per minute) for:
Stainless steels in general when no coolant is allowed, all heavy-wall tube and
some of the chrome/molybdenum steels.
Use 250 surface inches per minute (635 surface centimeters per minute) for:
Mild steels and some thin wall stainless steels when coolants are permitted and
applied.
Use 300 surface inches per minute (762 surface centimeters per minute) for:
Aluminum and thin-wall mild steel and tube with coolants.