92-1176 : Orig. 041012
TRI TOOL INC.
1 2
CUTTING SPEEDS:
The table below shows RPM required to obtain a specified Tool Bit
cutting speed on the surface of a pipe or tube.
Use 200 surface inches per minute (5080 surface millimeters per minute)
for stainless steels in general when no coolant is allowed, all heavy wall
tube, and some chrome/molybdenum alloys.
Use 250 surface inches per minute (6350 surface millimeters per minute)
for mild steel and some thin wall stainless steel when coolant are permit-
ted and used.
Use 300 surface inches per minute (7620 surface millimeters per minute)
for aluminum and thin-wall mild steel tube with coolant.
CUTTING FEEDS:
Use very light feed for initial severing or until a continuous cut is estab-
lished.
Use a feed rate .002" to .003" (.05mm to .08mm) per revolution once a
continuous cut is established.
If the feed is too light, only light stringer chips will be removed.
If the feed is too heavy, the drive will start to overload and the chip will
take on a rough or torn appearance.
Stainless steel, which work hardens, must be worked with a heavy
enough feed to stay under the work hardened surface.
Feed at rate of at least .003" to .005" (.08mm to .13mm) per revolution.
Never allow the bit to burnish the surface.
Reducing cutting feed and speed will normally minimize any chatter
problems.
Cutting Speeds approximately
RPM for
RPM for
RPM for
tube
200 in/min
250 in/min
300 in/min
size
(5080 mm/min)
(6350 mm/min)
(7620 mm/min)
2”
50.8 mm
32
40
48
3”
76.2 mm
21
26
32
4”
101.6 mm
16
20
24
5”
127.0 mm
13
16
19
6”
152.4 mm
11
13
16
CUTTING SPEEDS & FEEDS
