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MODULHARD’ANDREA
Technical Data
Recommended Cutting Conditions for Roughing Operations with Double-Bit Testarossa - TRD
Material
boring bar
dimensions
working
conditions
cuttin
speed
Vc = SFM
feed fn = inch/rev
insert grade
insert radius
R = 0.008 R = 0.16 finishing roughing
finishing
cutting depth
Ø 1.10
Ø 1.81
roughing
Ø 1.81
Ø 2.95
Ø 2.95
Ø 4.72
carbon steel
Rc < 20
L / d = 2.5 good 520 - 810
L / d = 4.0 normal 390 - 585
.004 - .008
.004 - .008
DC100
DP300
DP300
DP100R
.006 - .012 .06 .08 .10
L / d = 6.3 difficult 230 - 325 .004 - .006*
carbon steel
Rc > 20
L / d = 2.5 good 455 - 650
L / d = 4.0 normal 325 - 520
.004 - .008
.004 - .008 DC100
DP300
DP100R
.006 - .012 .06 .08 .10
L / d = 6.3 difficult 230 - 325 .004 - .006*
stainless steel
AISI 304 - 316
L / d = 2.5 good 325 - 455
.004 - .008
L / d = 4.0 normal 260 - 360
L / d = 6.3 difficult 195 - 290 .004 - .006*
.004 - .008 DP300 DP300 .006 - .012 .06 .08 .10
cast iron
L / d = 2.5 good 390 - 520
L / d = 4.0 normal 290 - 390
.004 - .008
.004 - .008
DK100
DC100
DP100R .006 - .012 .08 .10 .12
L / d = 6.3 difficult 195 - 290 .004 - .006*
aluminum
L / d = 2.5 good 810 - 1140
L / d = 4.0 normal 520 - 810
.004 - .008
.004 - .008 DK100 DK100 .006 - .012 .08 .10 .12
* only for finishing inserts
L / d = 6.3 difficult 325 - 490 .004 - .006*
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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