Smithy Midas 1220 XL - Manual (Page 98)

Table 22.1 Recommended Cutting Speeds for Milling (fpm)
Material
Brinell
Hardness
High-Speed-Steel
Cutters
Carbide
Cutters
Free-machining low carbon 1111
steel resulphurized 1112
100-150
150-200
120-160
120-180
400-600
400-900
Free-machining low carbon 10L18
steel leaded 12L14
100-150
150-220
100-225
110-250
250-500
250-600
Plain low-carbon steels1006
1026
100-125
125-175
80-150
80-140
300-600
250-500
Plain medium-carbon steels 1030
1095
125-175
175-225
80-140
60-110
250-500
225-400
Plain high-carbon steels 1060
1095
125-175
175-225
70-120
60-110
250-450
225-400
Tool Steels W1-W7
H20-H43
D1-D7
150-200
200-250
200-250
80-120
40-85
30-60
300-350
175-300
100-200
Stainless Steel 302
430F
135-185
135-185
70-100
100-140
225-350
350-450
Gray Cast Iron ASTM Class 20
Through Scale
Under Scale
110-160
140-200
130-225
350-700
400-800
Aluminum Cold-drawn
wrought alloys
500-800 1000-1800
Aluminum Casting Alloy
(as cast)
600-1000 1200-2000
Brass 360 free-cutting,
cold-drawn
300-500 600-1000
Bronze 220 commercial
annealed
80-140 180-275
22-3
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Midas 1220 XL Operator’s Manual