Page 95 - HOLE MAKING CATALOG p383-544

USER GUIDE
ISO

ITS BORE
Cutting Conditions for Boring Operations with BHC Combi Rough and Fine

Boring Depth to Working Cutting Feed fn=mm/rev Cutting Depth mm
Speed Roughing

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
Carbon Steel LDRED/BDRED = 4 normal 160-250 0.1-0.2 0.1-0.2
HB < 200 LDRED/BDRED = 6.3 difficult 120-180 0.1-0.2 0.1-0.2 IC807, IC908, 0.15-0.3 1.5 2 2.5
P LDRED/BDRED = 2.5 good 70-100 *0.1-0.15 0.1-0.2 IC520N, IC20N,
Carbon Steel LDRED/BDRED = 4 normal 140-200 0.1-0.2 0.1-0.2 IC30N, IC8150,
HB > 200 LDRED/BDRED = 6.3 difficult 100-160 0.1-0.2 0.1-0.2 IC8250, IC3028 0.15-0.3 1.5 2 2.5
LDRED/BDRED = 2.5 good 70-100 *0.1-0.15 0.1-0.2
Stainless LDRED/BDRED = 4 normal 100-140 0.1-0.2 0.1 -0.2
M Steel AISI LDRED/BDRED = 6.3 difficult 80-110 0.1-0.2 0.1 -0.2 IC807, IC30N, 0.15-0.3 1.5 2 2.5
LDRED/BDRED = 2.5 good 60-90 *0.1-0.15 0.1-0.2 IC3028
304-316 LDRED/BDRED = 4 normal
LDRED/BDRED = 6.3 difficult 120-160 0.1-0.2 0.1 -0.2 IB55, IC908, 0.15-0.3 2 2.5 3
K Cast Iron 90-120 0.1-0.2 0.1 -0.2 IC5005, IC428
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
0
.0005 n= Vc 1000 LDRED
BDRED ∏·D
ISO .001
.0015
Vf= n·fn 0.2
ap finishing
ap roughing

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 Feed f=mm/rev
Insert Radius
Material LDRED/BDRED Stability 0.1-0.25 RE=0.2 RE=0.4 Insert Grade
LDRED/BDRED=2.5 good IC20N
Carbon Steel LDRED/BDRED=4 normal Cutting Speed 0.05-0.08 0.08-0.10 IC30N
HB<200 LDRED/BDRED=6.3 difficult Vc=m/min 0.05-0.08 0.08-0.10 IC54
LDRED/BDRED=2.5 good 200-300 0.05-0.08 - IC20N
P LDRED/BDRED=4 normal 160-250 0.05-0.08 0.08-0.10 IC30N
Carbon Steel LDRED/BDRED=6.3 difficult 70-100 0.05-0.08 0.08-0.10 IC54
HB<200 LDRED/BDRED=2.5 good 160-250 0.05-0.08 -
LDRED/BDRED=4 normal 150-200 IC20
M Stainless Steel LDRED/BDRED=6.3 difficult 70-100 0.05-0.08 0.08-0.10
AISI 304-316 LDRED/BDRED=2.5 good 120-160 0.05-0.08 0.08-0.10 IC20
LDRED/BDRED=4 normal 100-140 0.05-0.08 -
LDRED/BDRED=6.3 difficult 70-100 0.05-0.08 0.08-0.10 477
K Cast Iron LDRED/BDRED=2.5 good 120-160 0.05-0.08 0.08-0.10
LDRED/BDRED=4 normal 100-140 0.05-0.08 -
LDRED/BDRED=6.3 difficult 70-100 0.05-0.08 0.08-0.10
N Aluminum 300-400 0.05-0.08 0.08-0.10
250-350 0.05-0.08 -
(1) ap=0.1 min 100-150