Table 1. Approximate Cutting Speeds and Feeds for Standard Automatic Screw Machine Tools—Brown and Sharpe
Cut
Material to be Machined
Mild or Soft Steel
Tool Steel, 0.80–1.00% C
Brass a
Width or Depth, Inches 0.005
Dia. of Hole, Inches
Surface Speed, Feet per Min.
Surface Speed, Feet per Min.
Feed, Inches per Rev.
Feed, Inches per Rev.
Feed, Inches per Rev. 0.004 0.005 0.004 0.003 0.002 0.0015 0.006 0.001 0.002 0.0004 0.001 0.001 0.0005 0.0006 0.0008 0.0012 0.0016 0.002 0.003 0.003 0.0035 … … 0.004 0.0006 0.0005 0.0004 0.0004 0.0003 0.0003
Carbon Tools
H.S.S. Tools
Carbon Tools
H.S.S. Tools
Tool
Boring tools
… … … … … … … … … … … … …
…
0.008 0.010 0.008 0.007 0.006 0.005 0.010 0.0015 0.0035 0.0006 0.0015 0.0015 0.0008 0.001 0.0014 0.002 0.0025 0.0035 0.004 0.005 0.005 0.006 0.0009 0.0008 0.0007 0.0006 0.0005 0.0005 0.0004 … …
50 70 70 70 70 70 70 50 50 80 80 80 80 30 30 40 40 40 40 40 40 40 40 40 80 80 80 80 80 80 80
110 150 150 150 150 150 150 110
30 40 40 40 40 40 40 30 30 50 50 50 50 14 16 30 30 30 30 30 30 30 30 30 50 50 50 50 50 50 …
60 75 75 75 75 75 75 75 75 85 85 85 85 … 20 45 45 45 45 60 60 60 60 60 85 85 85 85 85 85 …
0.012 0.010 0.008 0.008 0.006 0.010 0.003 0.006 0.0015 0.0035 0.0035 0.002 0.0014 0.002 0.004 0.006 … … 0.009 0.012 0.014 0.016 0.016
1 ∕ 32 1 ∕ 16
Box tools, roller rest
1 ∕ 8
Single chip finishing
3 ∕ 16
1 ∕ 4
Finishing
0.005
… … …
Under 1 ∕ 8 Over 1 ∕ 8
Center drills
110 150 150 150 150
Angular Circular Straight Button Chaser
Cutoff tools {
3 ∕ 64 - 1 ∕ 8 1 ∕ 16 - 1 ∕ 8
… … … … … … … … … … … … 1 ∕ 8 1 ∕ 4
Stock diameter under 1 ∕ 8 in.
…
Dies {
40
0.02 0.04
60 60 60 60 75 75 75 75 85
1 ∕ 16 3 ∕ 32
Drills, twist cut
1 ∕ 8
3 ∕ 16
1 ∕ 4
5 ∕ 16
3 ∕ 8 - 5 ∕ 8
… … … … … … …
0.002 0.002 0.0015 0.0012 0.001 0.001 0.001
150 150 150 150 150 150 150
3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4
Form tools, circular
1
…
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