19
Model 201BA BEVELMASTER
TM
92-0631 : Orig. 960119
CUTTING SPEEDS
The chart shows RPM required to obtain specified Tool Bit surface cutting speed at
the surface of the pipe or tube.
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.
Nominal
Pipe
Size
RPM for
200 in/min
(508 cm/min)
RPM for
250 in/min
(635 cm/min)
.250"
6.4 mm
255
318
.375"
9.5 mm
170
212
1/8"
.405"
10.3 mm
157
196
.500"
12.7 mm
127
159
1/4"
.540"
13.7 mm
118
147
3/8"
.675"
17.2 mm
94
118
.750"
19.1 mm
85
106
1/2"
.840"
21.3 mm
76
95
1.000"
25.4 mm
64
80
3/4"
1.050"
26.7 mm
61
76
1.250"
31.8 mm
51
64
1"
1.315"
33.4 mm
48
61
1.500"
38.1 mm
42
53
1 1/4"
1.660"
42.2 mm
38
48
1.750"
44.5 mm
36
45
1 1/2"
1.900"
48.3 mm
34
42
True
Diameter
Cutting Speeds
