Page 832 - Iscar

USER GUIDE
ITS BORE Recommended Cutting Conditions for Boring Operations with

BHC Combi Rough and Fine

Boring Depth Cutting Feed fn=mm/rev
to Diameter Working Speed
Material Ratio Conditions Vc=m/min R=0.2 R=0.4 Carbide Grade Cutting Depth mm
L / D = 2.5 good 160 - 250 0.1 - 0.2 0.1 - 0.2
Carbon Steel
HB < 200 L / D = 4 normal 120 - 180 0.1 - 0.2 0.1 - 0.2 0.15 - 0.3 1.5 2 2.5
L / D = 6.3 difficult 70 - 100 *0.1 - 0.15 0.1 - 0.2 IC807, IC908, IC520N,
IC20N, IC30N, IC8150,
L / D = 2.5 good 140 - 200 0.1 - 0.2 0.1 - 0.2 IC8250, IC3028
Carbon Steel
HB > 200 L / D = 4 normal 100 - 160 0.1 - 0.2 0.1 - 0.2 0.15 - 0.3 1.5 2 2.5
L / D = 6.3 difficult 70 - 100 *0.1 - 0.15 0.1 - 0.2
L / D = 2.5 good 100 - 140 0.1 - 0.2 0.1 -0.2
Stainless
Steel L / D = 4 normal 80 - 110 0.1 - 0.2 0.1 -0.2 IC807, IC30N, IC3028 0.15 - 0.3 1.5 2 2.5
AISI 304 - 316
L / D = 6.3 difficult 60 - 90 *0.1 - 0.15 0.1 - 0.2
L / D = 2.5 good 120 - 160 0.1 - 0.2 0.1 -0.2
IB55, IC908, IC5005,
Cast Iron L / D = 4 normal 90 - 120 0.1 - 0.2 0.1 -0.2 0.15 - 0.3 2 2.5 3
IC428
L / D = 6.3 difficult 60 - 90 *0.1 - 0.15 0.1 - 0.2
L / D = 2.5 good 250 - 350 0.1 - 0.2 0.1 - 0.2
Aluminum L / D = 4 normal 160 - 250 0.1 - 0.2 0.1 - 0.2 ID5, IC20 0.15 - 0.3 2 2.5 3

L / D = 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

n= Vc 1000
∏·D

d
Vf= n·fn
L

0.2
ap roughing ap finishing

ISCAR
828 ISCAR
828