Xi'an Winway Machinery Co.,LTD.

Twist Drill

Twist Drill

Special flue design on drill will increase the space for chip removal. Unique edge treatment can ensure the high feed and efficiency.

Product Details

Twist Drill



Special flue design on drill will increase the space for chip removal. Unique edge treatment can ensure the high feed and efficiency.


Worpiece Material

Cutting speed (m/min)

FN (mm/rev)

External cooling

Internal cooling

φ12

φ14

φ16

φ18

φ20

Mild steel, long chip

(<125HB)

120-80-50

140-100-60

0.18-0.28-0.40

0.22-0.32-0.45

0.22-0.32-0.45

0.25-0.38-0.50

0.25-0.38-0.50

Mild steel, short chip, free cutting steel(<25HRC)

120-75-50

140-100-60

0.18-0.28-0.40

0.22-0.32-0.45

0.22-0.32-0.45

0.25-0.38-0.50

0.25-0.38-0.50

High and medium carbon steel

(<35HRC)

120-70-45

120-80-60

0.18-0.28-0.38

0.22-0.32-0.45

0.22-0.32-0.45

0.25-0.38-0.50

0.25-0.38-0.50

Alloy steel, tool steel

(<35-48HRC)

100-70-45

110-50-60

0.15-0.23-0.34

0.18-0.25-0.38

0.18-0.25-0.38

0.25-0.38-0.50

0.20-0.30-0.40

Alloy steel, tool steel

(<35-48HRC)

80-60-35

90-60-35

0.11-0.19-0.30

0.12-0.22-0.32

0.12-0.22-0.32

0.20-0.30-0.40

0.14-0.24-0.34

PH, ferrite and  martensite steel

(<35HRC)

70-50-30

90-60-30

0.10-0.18-0.28

0.12-0.20-0.30

0.12-0.20-0.30

0.14-0.24-0.32

0.14-0.24-0.32

High strength PH, ferrite and martensite steel(35-48HRC)

70-45-25

80-50-30

0.10-0.18-0.28

0.12-0.20-0.30

0.12-0.20-0.30

0.14-0.24-0.32

0.14-0.24-0.32

Grey cast iron

(<32HRC)

140-100-60

160-120-60

0.25-0.33-0.45

0.28-0.36-0.48

0.30-0.40-0.50

0.32-0.42-0.52

0.35-0.45-0.55

Alloy cast iron, nodular cast iron

(<28HRC)

120-80-60

140-100-60

0.22-0.30-0.42

0.24-0.33-0.45

0.25-0.35-0.48

0.28-0.38-0.48

0.30-0.40-0.50

Difficult cutting alloy cast iron, nodular cast iron (<45HRC)

100-70-50

100-80-50

0.16-0.22-0.28

0.18-0.24-0.30

0.20-0.26-0.32

0.22-0.28-0.34

0.23-0.28-0.35

If you are willing to know twist drill shapes, types or its' geometry, or if you are going to wholesale twist drill grape, with the products for sale, Winway Tools, one of the leading manufacturers in China, is always at your service. Please be free to get the product from our factory.

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