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MODULHARD’ANDREA
Technical Data
Recommended Cutting Conditions for Roughing Operations with Testarossa - TRC - TRM
Material
boring bar
dimensions
working
conditions
cutting speed
Vc = SFM
feed fn = inch/rev (twin cutters)
insert radius
R = 0.0 R = 0.008 R = 0.016
insert grade
cutting depth
carbon steel
Rc < 20
L / d = 2.5 good 650 - 975 --
DC100
.002 - .004
L / d = 4.0 normal 520 - 810 --
.002 - .003
L / d = 6.3 difficult 230 - 325 .002 - .003 -- DP300
carbon steel
Rc > 20
stainless steel
AISI 304 - 316
L / d = 2.5 good 520 - 810 --
.002 - .004
L / d = 4.0 normal 490 - 650 --
.002 - .003
L / d = 6.3 difficult 230 - 325 .002 - .003 --
L / d = 2.5 good 390 - 520 --
.002 - .004
L / d = 4.0 normal 325 - 455 --
.002 - .003
L / d = 6.3 difficult 230 - 325 .002 - .003 --
DC100
DP300
cast iron
L / d = 2.5 good 390 - 520 --
L / d = 4.0 normal 325 - 455 --
.002 - .003
.002 - .004
DC100
aluminum
L / d = 6.3 difficult 230 - 325 .002 - .003 -- DK100
L / d = 2.5 good 975 - 1300 --
.002 - .004
L / d = 4.0 normal 810 - 1140 --
.002 - .003
DK100
L / d = 6.3 difficult 325 - 490 .002 - .003 --
.004 - .010
steel
HRC > 50
L / d = 2.5 good 260 - 325 -- .0015 - .0025
L / d = 4.0 normal 260 - 325 -- .0015 - .0025
.002 - .003 D20CBN
Calculation Formulas For Boring
Vc cutting speed (SFM) Vc = RPM • D
D diameter of workpiece (inch) 3.82
RPM number of revolutions / min’ RPM = Vc • 3.82
Vf feed rate (inch/min.) D
fn feed / rev (inch/rev.) Vf = RPM • fn
π 3.14
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