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Stainless Steel, 304

36

1100

500

350

Stainless Steel, 316

30

900

450

300

Steel, 12L14

67

2000

1000

650

Steel, 1018

34

1000

500

350

Steel, 4130

27

800

400

250

Gray Cast Iron

34

1000

500

350

Aluminum, 7075

300

2800

2500

2000

Aluminum, 6061

280

2800

2500

2000

Aluminum, 2024

200

2800

2500

2000

Aluminum, Cast

134

2800

2000

1300

Brass

400

2800

2800

2800

MATERIAL

CUT SPEED

1/16" DIA. 1/4" DIA.

(S.F.M.)

Carbon Steel

36

2000 RPM

550 RPM

Cast Iron, Soft

30

1800

450

Stainless Steel

24

1400

360

Copper

72

2000

1100

Aluminum, Bar

240

2000

2000

Aluminum, Cast

120

2000

2000

SPEED ADJUSTMENT CHART

DRILLS

FIGURE 11-End mill and drill speed adjustment chart.

MATERIAL

CUT SPEED

1/8"

1/4"

3/8"

(S.F.M.)

DIA.

DIA.

DIA.

END MILLS (Slot and side milling)

Stainless Steel, 303

40

1200 RPM 600 RPM 400 RPM

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