Drill Bit Chart

Fractional Drills

 

 

Fractional Drills
Fraction

Dismal"

1/64"

.0156
1/32"

.0312
3/64"

.0468
1/16"

.0625
5/64"

.0781
3/32"

.0937
7/64"

.1093
1/8"

.125
9/64"

.1406
5/32"

.1562
11/64"

.1718
3/16"

.1875
13/64"

.2031
7/32"

.2187
15/64"

.2343
1/4"

.25
17/64"

.2656
9/32"

.2812
19/64"

.2968
Fractional Drills
Fraction Dismal"
5/16" .3125
21/64" .3281
11/32' .3437
23/64" .3593
3/8" .375
25/64" .3906
13/32" .4062
27/64 .4218
7/16" .4375
29/64" .4531
15/32" .4687
31/64" .4843
1/2" .5
17/32" .5312
9/16" .5625
19/32" .5937
5/8" .625
3/4" .75
7/8" .875

Letter Drills

 

 

 

Letter Drills

Letter

Dismal"

A

.2340

B

.2380
C

.2420
D

.2460
E

.2500
F

.2570

G

.2610

H

.2660

I

.2720

J

.2770

K

.2810

L

.2900

M

.2950

 

Letter Drills

Letter

Dismal"

N

.3020
O

.3160
P

.3230
Q

.3320
R

.3390
S

.3480
T

.3580
U

.3680
V

.3770
W

.3860
X

.3970
Y

.4040
Z

.4130

Number Drills

Number Drills

Number

Dismal"

1

.2280

2

.2210
3

.2130
4

.2090
5

.2055
6

.2040

7

.2010

8

.1990

9

.1960

10

.

11

.

12

.

13

.1850
14

.1820
15

.1800
16

.1770
17

.1730
18

.
19

.1660
20

.1610
21

.1590
22

.1570
23

.1540
24

.1520
25

.1495
26

.1470
27

.1440
28

.1415
29

.1360
30

.1287

Number Drills

Number

Dismal"

31

.1200

32

 .1160
33 .1130
34 .1110
35 .1100
36 .1065

37

 .1040

38

 .1015

39

.0995

40

.0980

41

.0960

42

.0935

43

.0890

44

.0860

45

.0820

46

.0810

47

.0785

48

.0760

49

.0730

50

.0700

51

.0670

52

.0635

53

.0559

54

.0550

55

.0520

56

.0465

57

.0430

58

.0420

59

.0410

60

.0400