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|
Machining Group Reference Chart for Steels |
|
MG# |
Material Description |
Hardness |
Grade Selection |
SFM |
MPM |
|
6 |
Low Carbon & Leaded |
160-260 BHN |
CM1
TN7
CG5
CG6 |
75-200
200-800
150-350
250-500 |
23 - 61
61 - 244
46 - 107
76 - 152 |
ALO
C50
C70 |
350-700
150-250
150-250 |
107 - 213
46 - 76
46 - 76 |
|
7 |
Medium Carbon |
140-200 BHN |
CM1
TN7
CG5
CG6 |
75-200
200-800
150-350
250-500 |
23 - 61
61 -244
46 - 107
76 -152 |
ALO
C50
C70 |
350-700
150-250
150-250 |
107 - 213
46 - 76
46 - 76 |
|
8 |
High Carbon |
220-260 BHN |
CM1
TN7
CG5
CG6 |
75-200
200-800
150-350
250-500 |
23 - 61
61 -244
46 - 107
76 -152 |
ALO
C50
C70 |
350-700
150-250
150-250
|
107 - 213
46 - 76
46 - 76 |
|
9 |
Low Carbon Alloys |
220-260 BHN |
CM1
TN7
CG5
CG6 |
75-200
200-800
150-350
250-500 |
23 - 61
61 -244
46 - 107
76 -152 |
ALO
C50
C70 |
350-700
150-250
150-250 |
107 - 213
46 - 76
46 - 76 |
|
10 |
Medium Carbon Alloys |
220-260 BHN |
CM1
TN7
CG5 |
75-200
200-800
150-350 |
23 - 61
61 -244
46 - 107 |
CG6
ALO
C50
C70 |
250-500
350-700
150-250
150-250 |
76 - 152
107 - 213
46 - 76
46 - 76 |
|
11 |
High Strength Alloys |
220-260 BHN |
CM1
CG5
ALO |
75-150
100-200
350-600 |
23 - 46
30 - 61
107 - 183 |
C50
C70
TN7 |
100-150
100-150
200-500 |
30 - 46
30 - 46
61 - 152 |
|
12 |
Tool Steels |
220-250 BHN |
CM1
CG5 |
75-150
100-250 |
23 - 46
30 - 76
|
ALO
TN7 |
300-450
200-500 |
91 - 137
61 - 152 |
|
13 |
Powder Metal Alloys |
230-260 BHN |
CM1
CG5 |
75-150
100-250 |
23 - 46
30 - 76
|
|
26 |
Heat Treated Alloys |
32-40 RC |
CM1
CG5 |
75-150
100-250 |
23 - 46
30 - 76
|
|
Darker areas are CIRCLE'S primary insert grade recommendations
and surface speeds for the material shown. Insert grades shown in the lighter areas,
reflect secondary choices. Machining speeds, feeds, and depth of cuts are considered
to be "safe" starting conditions. |
|
Machining Group Reference Chart for Stainless Steels |
|
MG# |
Material Description |
Hardness |
Grade Selection |
SFM |
MPM |
|
14 |
300 Series |
135-185 BHN |
CM1 |
75-250 |
23 - 76 |
|
CG5 |
150-300 |
46 - 91 |
|
CG6 |
200-500 |
61 - 152 |
|
TN7 |
200-500 |
61 - 152 |
|
15 |
400 SERIES |
180-220 BHN |
CM1 |
75-200 |
23 - 61 |
|
CG5 |
150-250 |
46 - 76 |
|
CG6 |
200-400 |
61 - 122 |
|
ALO |
300-450 |
91 - 137 |
|
TN7 |
200-500 |
61 - 152 |
|
16 |
13-8 PH
15-5 PH
17-4 PH |
32-35 RC |
CM1 |
75-200 |
23 - 61 |
|
CG5 |
150-300 |
46 - 91 |
|
TN7 |
200-500 |
60 - 152 |
|
Darker areas are CIRCLE'S primary insert grade recommendations
and surface speeds for the material shown. Insert grades shown in the lighter areas,
reflect secondary choices. Machining speeds, feeds, and depth of cuts are considered
to be "safe" starting conditions. |
|
Machining Conditions for Boring Steels and Stainless Steels
|
|
Circle
|
Inch
|
Metric
|
|
Insert
|
Depth of Cut
(Per Side)
|
Feed Rate
(IPR)
|
Depth of Cut
(Per Side)
|
Feed Rate
(MMPR)
|
|
ABD 06
ABD 09
ABD 125
ABD 156
ABC TYPE
|
0.001" - 0.004"
0.001" - 0.004"
0.001" - 0.007"
0.001" - 0.008"
0.002" - 0.008" |
0.002" - 0.0005"
0.002" - 0.0005"
0.003" - 0.0005"
0.004" - 0.001"
0.007" - 0.001" |
0,025 - 0,102
0,025 - 0,102
0,025 - 0,178
0,025 - 0,203
0,051 - 0,203 |
0,051 - 0,013
0,051 - 0,013
0,076 - 0,013
0,102 - 0,025
0,178 - 0,025 |
|
BB 187
BB 250
BB 312
|
0.002" - 0.008"
0.002" - 0.008"
0.002" - 0.008" |
0.007" - 0.001"
0.007" - 0.001"
0.007" - 0.001" |
0,051 - 0,203
0,051 - 0,203
0,051 - 0,203 |
0,178 - 0,025
0,178 - 0,025
0,178 - 0,025 |
CDCD-5
CDCG-5
CDCT-5 |
0.002" - 0.008"
0.002" - 0.008"
0.003" - 0.010" |
0.007" - 0.001"
0.007" - 0.001"
0.009" - 0.002" |
0,051 - 0,203
0,051 - 0,203
0,076 - 0,254 |
0,178 - 0,025
0,178 - 0,025
0,229 - 0,051 |
CPCA-2
CPCM-2 |
0.002" - 0.012"
0.002" - 0.012" |
0.010" - 0.001"
0.010" - 0.001" |
0,051 - 0,305
0,051 - 0,305 |
0,254 - 0,025
0.254 - 0.025 |
CPGT-3
CPMT-3 |
0.002" - 0.090"
0.005" - 0.090" |
0.012" - 0.001"
0.012" - 0.005" |
0,051 - 2,286
0,127 - 2,286 |
0,305 - 0,025
0,305 - 0,127 |
GCCD-6
GCCT-6 |
0.002" - 0.012"
0.003" - 0.015" |
0.008" - 0.001"
0.009" - 0.002" |
0,051 - 0,305
0,076 - 0,381 |
0,203 - 0,025
0,229 - 0,051 |
GPCD-5
GPCT-5 |
0.002" - 0.008"
0.003" - 0.010" |
0.007" - 0.001"
0.009" - 0.002" |
0,051 - 0,203
0,076 - 0,254 |
0,178 - 0,025
0,229 - 0,051 |
TDAB-5
TDAT-5
TDCG-5 |
0.002" - 0.007"
0.003" - 0.009"
0.002" - 0.007" |
0.004" - 0.001"
0.009" - 0.002"
0.004" - 0.001" |
0,051 - 0,178
0,076 - 0,229
0,051 - 0,178 |
0,102 - 0,025
0,229 - 0,051
0,102 - 0,025 |
TPCB-2
TPCG-2
TPCH-2
TPGT-2
TPMT-2 |
0.002" - 0.020"
0.002" - 0.006"
0.002" - 0.020”
0.002" - 0.006"
0.007" - 0.025" |
0.010" - 0.001"
0.005" - 0.002"
0.010" - 0.001"
0.005" - 0.002"
0.015" - 0.005" |
0,051 - 0,508
0,051 - 0,152
0,051 - 0,508
0,051 - 0,152
0,178 - 0,635 |
0,254 - 0,025
0,127 - 0,051
0,254 - 0,025
0,127 - 0,051
0,381 - 0,127 |
TD-6P
TPCG-32
TPGH-32
TPGT-32
TPMT-32 |
0.002" - 0.090"
0.002" - 0.090"
0.002" - 0.090"
0.002" - 0.060"
0.010" - 0.036" |
0.012" - 0.001"
0.012" - 0.001"
0.012" - 0.001"
0.005" - 0.002"
0.025" - 0.010" |
0,051 - 2,286
0,051 - 2,286
0,051 - 2,286
0,051 - 1,524
0.254 - 0.914 |
0,305 - 0,025
0,305 - 0,025
0,305 - 0,025
0,127 - 0,051
0,635 - 0,254
|
WPGT-2
WPGT-6
WPMT-2
WPMT-3
WPMT-6 |
0.002" - 0.016"
0.002" - 0.011"
0.007" - 0.025"
0.005" - 0.090"
0.003" - 0.011" |
0.010" - 0.001"
0.011" - 0.002"
0.015" - 0.005"
0.012" - 0.005"
0.011" - 0.002" |
0,051 - 0,406
0,051 - 0,279
0,178 - 0,635
0,127 - 2,286
0,076 - 0,279 |
0,254 - 0,025
0,279 - 0,051
0,381 - 0,127
0,305 - 0,127
0,279 - 0,051 |
|
As Depth of Cut increases...Feed Rate ...decreases.
SFM = Surface Footage per Minute. / MPM = Meters Per Minute.
I.P.R. = Inches Per Revolution. / MMPR = Millimeters Per Revolution.
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