
APPENDIX
B–65152E/03
K. CUTTING AMOUNT OF MACHINE
223
Rate of metal removal per kW (cc/min/kW) (average values)
(when the drive efficiency of spindle is 80%)
MR: Rate of metal removal per kW (cc/min/kW)
MATERIAL
HARDNESS
(*1)
Brinell
TURNING MRt HSS
AND CARBIDE
TOOLS feed 0.127 to
0.381 mm/rev
MILLING MRm CAR-
BIDE TOOLS feed
0.127 to 0.305 mm/
tooth
DRILLING MRd HSS
DRILLS feed 0.05 to
0.203 mm/rev
hardness
SHARP
TOOL
DULL
TOOL
SHARP
TOOL
DULL
TOOL
SHARP
TOOL
DULL
TOOL
STEEL–WROUGHT AND CAST 85 to 200 (*2) 20 15.7 20 15.7 21.9 16.8
Plain Carbon
All
t
l
35 to 40 Rc (*3) 15.7 12.9 14.6 11.5 15.7 12.9
Alloy Steels
Tool Steels
40 to 50 Rc 14.6 11.5 12.2 10 12.9 10.4
50 to 55 Rc 10.9 8.7 10.4 8.4 10.4 8.4
55 to 58 Rc 6.4 5.2 8.4 6.8 8.4 6.8 (*4)
CAST IRONS 110 to 190 31.3 24.4 36.6 27.4 21.9 18.3
Gray, Ductile and Malleable
190 to 320 15.7 12.9 20 15.7 13.7 10.9
STAINLESS STEELS 135 to 275 16.8 13.7 15.7 12.9 20 15.7
Ferritic, Austenitic and
Martensitic
30 to 45 Rc 15.7 12.9 14.6 11.5 18.3 14.6
PRECIPITATION HARDENING
STAINLESS STEELS
150 to 450 15.7 12.9 14.6 11.5 18.3 14.6
TITANIUM 250 to 375 18.3 14.6 20 15.7 20 15.7
HIGH TEMPERATURE ALLOYS
Nickel and Cobalt Base
200 to 360 8.7 7.0 10.9 8.7 10.9 8.7
Iron Base 180 to 320 13.7 10.9 13.7 10.9 18.3 14.6
REFRACTORY ALLOYS...
Tungsten
321 7.8 6.2 7.5 6.1 8.4 6.6 (*4)
Molybdenum 229 10.9 8.7 13.7 10.9 13.7 10.9
Columbium 217 12.9 10.4 14.6 11.5 15.7 12.9
Tantalum 210 7.8 6.2 10.9 8.7 10.4 8.4
NICKEL ALLOYS 80 to 360 10.9 8.7 11.5 9.1 12.2 10
ALUMINIUM ALLOYS 30 to 150
500 kg
87.8 73.2 68.6 54.9 137.2 109.8
MAGNESIUM ALLOYS 40 to 90
500 kg
137.2 109.8 137.2 109.8 137.2 109.8
COPPER 80Rb (*5) 21.9 18.3 21.9 18.3 24.4 20
COPPER ALLOYS 10 to 80Rb 34.3 27.4 34.3 27.4 45.7 36.6
80 to 100Rb 21.9 18.3 21.9 18.3 27.4 21.9
NOTE
*1 Brinell hardness, Standard testing method, Steel ball diameter 10mm, Load: 3000kg,
Maximum value about 450.
*2 Corresponds to hardness of general steel S45C.
*3 Rc: Rockwell hardness, C scale, Measurement of hardness of comparatively hard metals.
*4 Carbide.
*5 Rb: Rockwell hardness, B scale, Measurement of hardness of soft metals.