Iso Metric Thread Data; Cutting Speed - Sharp V-1 General & Electrics Manual

SHARP

8.2 ISO METRIC THREAD DATA

Core
O. Dia.
Dia.
3.0 2.3866
4.0 3.1412
5.0 4.0184
6.0 4.7732
8.0 6.4664
10.0 8.1596
12.0 9.8530
16.0 13.5462
20.0 16.9328
22.0 18.9328
24.0 20.3194
30.0 25.7060

8.3 CUTTING SPEED

The cutting speed of milling cutter can be expressed by
v= Dn / 1000
Where:
V = cutting speed
D = diameter of cutter
n = revolution per minute of the spindle
Cutting speed varies between wide limits which are determined by the material being cut,
the material used in the cutter, and other conditions which are determined by the specific
operation to be performed. Consider the following whenever they are needed:
(1.)Reducing cutting speed will increase cutter life.
(2.)For roughing operations, using lower cutting speed and higher work feed. In finishing
operations, higher cutting speed and lower work feed are recommended.
(3.)Use cutting speed below averaged value in the beginning of a new operation and increase
it during the operation.
Refer to table 1. In the selection of cutting speed.
Pitch Depth
0.5 0.3067
0.7 0.4294
0.8 0.4908
1.0 0.6134
1.25 0.7668
1.5 0.9202
1.75 1.0735
2.0 1.2269
2.5 1.5336
2.5 1.5336
3.0 1.8403
3.5 2.147
CH8-6
V-1 KNEE MILL GENERAL MANUAL
Flat Effective
0.0625 2.675
0.0875 3.545
0.1 4.48
0.125 5.35
0.15625 7.188
0.1875 9.026
0.21856 10.836
0.25 14.701
0.3125 18.376
0.3125 20.376
0.375 22.051
0.4375 27.727
Tapping Clear
2.5 3.1
3.3 4.1
4.2 5.1
5.0 6.1
6.8 8.2
8.5 10.2
10.2 12.2
14.0 16.25
17.5 20.25
19.5 22.25
21.0 24.25
26.5 30.5
KRDM24C0 V4.0S