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02 0581

NZ. pub. 09/14 ©

* Limited suitability

Material

Material Examples

Tensile Strength

N

/sq.mm

Cooling

Agent

Cutting

Speed

m/min.

Medium r.p.m.

feed s (mm/r.p.m.)

at drill dia.

2

5 8 10 16 20

Spring steel*

38Si:51MnV7:67SiCr5,58CrV4 800-1100

Oil

(emulsion)

4-12

1280

0.025

510

0.050

320

0.080

255

0.100

160

0.125

130

0.160

Corrosion and

Acid Resistant Steel

X20Cr 13:X5CrNi18 9:

X10CrNiMoTi 18 10

500-800

Oil

10

1600

0.032

635

0.063

400

0.100

320

0.125

200

0.160

160

0.200

Heat Resistant Steel

X10CrSi6:X10CrA17

450-700

Oil

16

2560

0.032

1025

0.063

640

0.100

515

0.125

320

0.160

255

0.200

X10CrAI18:X20CrNiSi25 4:

X12CrNiTi18 9

500-800

Oil

10

1600

0.025

635

0.050

400

0.080

320

0.100

200

0.125

160

0.160

X12CrNi25 21:X12NiCrSi36 16 500-800

Oil

6

960

0.020

385

0.040

240

0.063

190

0.080

120

0.100

95

0.125

Special Ni-Cr-alloy*

Nimonic, Hastelloy

Inconel, Monel

500-1200 Oil

3-10

960

0.022

385

0.045

240

0.071

190

0.090

120

0.112

95

0.143

Ti and

Ti Alloy, Annealed

Ti99, 5-99.8: TiAl5Sn2, 5:

TiAl5Sn5Zr5

350-800

Oil

10

1600

0.025

635

0.050

400

0.080

320

0.100

200

0.125

160

0.160

Ti Alloy Precipitation

Hardened

TiCu2:TiAl6V4:TiAl6V6Sn2

700-1200 Oil

5

800

0.020

320

0.040

200

0.063

160

0.080

100

0.100

80

0.125

Bronze Cu-Ni Alloyed* CuNi10Fe: CuNi30Fe

300-500

Oil

(emulsion)

20

3200

0.032

1280

0.063

800

0.100

640

0.125

400

0.160

320

0.200

Bronze Cu-Al Alloyed*

CuAl8Fe:

G-CuAl10Fe, G-CuAl 11 Ni

400-650

Oil

(emulsion)

10-20

2400

0.032

955

0.063

600

0.100

480

0.125

300

0.160

240

0.200

*

HSCO TWIST DRILL BITS - METRIC - INFORMATION