Page 479 - ISCAR(HOLE_MAKING_CATALOG_65)

USER GUIDE

Cutting Conditions for Boring Operations with BHC Combi Rough and Fine ITS BORE
Cutting Feed fn=mm/rev Cutting Depth mm
Boring Depth to Working Speed Roughing
ISO Material Diameter Ratio Conditions Vc=m/min RE=0.2 RE=0.4 Carbide Grade Finishing Ø28-Ø46 Ø46-Ø75 Ø75-Ø160
LDRED/BDRED = 2.5 good 160-250 0.1-0.2 0.1-0.2
Carbon Steel LDRED/BDRED = 4 normal 120-180 0.1-0.2 0.1-0.2 IC807, IC908, 0.15-0.3 1.5 2 2.5
HB < 200
70-100
P LDRED/BDRED = 6.3 difficult 140-200 *0.1-0.15 0.1-0.2 IC520N, IC20N,
LDRED/BDRED = 2.5
0.1-0.2 0.1-0.2
good
IC30N, IC8150,
Carbon Steel LDRED/BDRED = 4 normal 100-160 0.1-0.2 0.1-0.2 IC8250, IC3028 0.15-0.3 1.5 2 2.5
HB > 200
LDRED/BDRED = 6.3 difficult 70-100 *0.1-0.15 0.1-0.2
Stainless LDRED/BDRED = 2.5 good 100-140 0.1-0.2 0.1 -0.2
M Steel AISI LDRED/BDRED = 4 normal 80-110 0.1-0.2 0.1 -0.2 IC807, IC30N, 0.15-0.3 1.5 2 2.5
304-316 LDRED/BDRED = 6.3 difficult 60-90 *0.1-0.15 0.1-0.2 IC3028
LDRED/BDRED = 2.5 good 120-160 0.1-0.2 0.1 -0.2 IB55, IC908,
K Cast Iron LDRED/BDRED = 4 normal 90-120 0.1-0.2 0.1 -0.2 IC5005, IC428 0.15-0.3 2 2.5 3
LDRED/BDRED = 6.3 difficult 60-90 *0.1-0.15 0.1-0.2
LDRED/BDRED = 2.5 good 250-350 0.1-0.2 0.1-0.2
N Aluminum LDRED/BDRED = 4 normal 160-250 0.1-0.2 0.1-0.2 ID5, IC20 0.15-0.3 2 2.5 3
LDRED/BDRED = 6.3 difficult 100-150 *0.1-0.15 0.1-0.2
* Only for finishing Inserts.
** Use inserts with the same corner radii for both roughing and finishing inserts
Vc Cutting speed (m/min)
D Diameter of workpiece (mm)
n Number of revolutions / min' (rev./min)
Vf Feed rate (mm/min.)
fn Feed / rev/ (mm/rev)
∏ 3.14

Vc= ∏·D·n

1000
LDRED
BDRED
n= Vc 1000

.0015 0 .0005 .001 ∏·D LDRED
BDRED
Vf= n·fn
0.2
ap roughing ap finishing
In case of a single or a stepped boring cutter configuration, only half the feed should be applied.
Cutting Conditions for BHD / BHF / BHE Fine Boring Heads

ap
0.1-0.25
Feed f=mm/rev
Cutting Speed Insert Radius
ISO Material LDRED/BDRED Stability Vc=m/min RE=0.2 RE=0.4 Insert Grade
Carbon Steel LDRED/BDRED=2.5 good 200-300 0.05-0.08 0.08-0.10 IC20N
HB<200 LDRED/BDRED=4 normal 160-250 0.05-0.08 0.08-0.10 IC30N
P LDRED/BDRED=6.3 difficult 70-100 0.05-0.08 - IC54
good
Carbon Steel LDRED/BDRED=2.5 normal 160-250 0.05-0.08 0.08-0.10 IC20N
0.05-0.08
0.08-0.10
IC30N
150-200
LDRED/BDRED=4
HB<200
LDRED/BDRED=6.3 difficult 70-100 0.05-0.08 -
LDRED/BDRED=2.5 good 120-160 0.05-0.08 0.08-0.10 IC54
Stainless Steel
M LDRED/BDRED=4 normal 100-140 0.05-0.08 0.08-0.10
AISI 304-316
LDRED/BDRED=6.3 difficult 70-100 0.05-0.08 -
LDRED/BDRED=2.5 good 120-160 0.05-0.08 0.08-0.10 IC20
K Cast Iron LDRED/BDRED=4 normal 100-140 0.05-0.08 0.08-0.10
LDRED/BDRED=6.3 difficult 70-100 0.05-0.08 -
LDRED/BDRED=2.5 good 300-400 0.05-0.08 0.08-0.10 IC20
N Aluminum LDRED/BDRED=4 normal 250-350 0.05-0.08 0.08-0.10
LDRED/BDRED=6.3 difficult 100-150 0.05-0.08 -
(1) ap=0.1 min
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