DRILLING AND TAPPING


Drilling:- operation is material removing  circular shape operation part of the manufacture technology using drill machine ,lathe ,cnc lathe ,cnc milling  and milling using by hss and carbide tools


Tapping:-Tapping is the thread cutting operation of the manufacture technology .thread cutting use clamped assembling parts .holding machine parts, using nuts, bolts, engine .different types of thread and angle. 



1.CUTTING        TOOLS  MATERIAL  

 

 

 

 1.    HIGH SPEED STEEL 

 2.    CEMENTED CARBIDE

 3.    HIGH CARBON STEEL

 4.    CERAMIC TOOL

 5.    DIAMOND TOOL

 6.    CAST ALLOY

 7.    CUBIC BORON NITREDE


                                                                         
Drill bite diagram



Parts of drill bite

a).Axis -The longitudinal canter line of the drill.

b).Body-The portion of the drill from its extreme point to the start of neck.

c). Body Clearance-The portion of the body surface ,which is reduced in diameter to provide diametral clearance.

d).Chisel Edge-The edge formed by the intersection of flanks.

e).Face-The portion of the flute surface to the lip on which is chip flows.

f).Flute- The helical grooves cut in the body of the body of the drill to provide cutting edge and permit removal of chips and allow cutting fluid to reach the cutting edge.

g).Land-The cylindrically ground surface on the leading edge of drill flutes. The width of land is measured at right angles to flute helix.                               

                                                                                                    

                               TAP DRILL SIZE

 

MATRIC {millimeter}

TDS=major diameter (mm)-pitch (mm)

Examples:-M8-0.5=7.5mm

 

SI.NO

TAP SIZE

PITCH SIZE

DRILL SIZE

1.

M1

0.2

0.8mm

2.

M1

0.25

0.75mm

3.

M1.1

0.25

0.85mm

4.

M1.1

0.2

0.9mm

5.

M1.2

0.25

0.95mm

6.

M1.4

0.2

1.2mm

7.

M1.6

0.35

1.25mm

8.

M1.8

0.2

1.6mm

9.

M1.8

0.35

1.45mm

10

M2

0.25

1.75mm

11

M2

0.4

1.6mm

12

M2.2

0.25

1.95mm

13

M2.2

0.45

1.75mm

14

M2.5

0.35

2.15mm

15

M2.5

0.45

2.05mm

16

M3

0.35

2.65mm

17

M3

0.5

2.5mm

18

M3.5

0.35

3.15mm

19

M3.5

0.6

2.9mm

20

M4

0.35

3.65mm

21

M4

0.5

3.5mm

22

M4

0.7

3.3mm

23

M4.5

0.5

4mm

24

M4.5

0.75

3.75mm

25

M5

0.5

4.5mm

26

M5

0.8

4.2mm

27

M5.5

0.5

5mm

28

M6

0.5

5.5mm

29

M6

0.75

5.25mm

30

M6

1

5mm

31

M7

0.75

6.25mm

32

M7

1

6mm

33

M8

0.5

7.5mm

34

M8

0.75

7.25mm

35

M8

1

7mm

36

M8

1.25

6.75mm

37

M9

0.75

8.25mm

38

M9

1

8mm

39

M9

1.25

7.75mm

40

M10

0.75

9.25mm

41

M10

1.5

8.5mm

42

M10

1.25

8.75mm

43

M10

1

9mm

44

M11

1.5

9.5mm

45

M12

1.5

10.5mm

46

M12

0.75

11.25mm

47

M12

1

11mm

48

M12

1.25

10.75mm

49

M14

1.5

12.5mm

50

M14

1.25

12.75mm

51

M14

1

13mm

52

M14

2

12mm

53

M15

1

14mm

54

M15

1.5

13.5mm

55

M16

1

15mm

56

M16

1.5

14.5mm

57

M16

2

14mm

58

M17

1

16mm

59

M17

1.5

15.5mm

60

M18

2.5

15.5mm

61

M18

1

17mm

62

M18

1.5

16.5mm

63

M18

2

16mm

64

M20

1

19mm

65

M20

1.5

18.5mm

66

M20

2

18mm

67

M20

2.5

17.5mm

68

M22

2

20mm

69

M22

1.5

20.5mm

70

M22

1

21mm

71

M22

2.5

19.5mm

72

M24

3

21mm

73

M24

1

23mm

74

M24

1.5

22.5mm

75

M24

2

22mm

 

 

 

 

 


 

Thank you