Contact Us

Ohio Drill & Tool Company
23255 Georgetown Rd.

P.O. Box 154 
Homeworth, OH 44634
(330) 525-7717

(800) 826-5237
Fax: (330) 525-5432

 

Cobalt Screw Machine Drills

Manufactured with 8% cobalt for use in drilling tough materials such as stainless steels. 1/16" and larger have a 135 deg. Split point. The 135 deg. Split point heavy duty construction helps in tough drilling applications.

Fractional Sizes
catalog page: 23
Size Part Number Decimal Equivalent Overall Length Flute Length
3/64 304003 .0469 1-3/8 1/2
1/16 304004 .0625 1-5/8 5/8
5/64 304005 .0781 1-11/16 11/16
3/32 304006 .0938 1-3/4 3/4
7/64 304007 .1094 1-13/16 13/16
1/8 304008 .1250 1-7/8 7/8
9/64 304009 .1406 1-15/16 15/16
5/32 304010 .1562 2-1/16 1
11/64 304011 .1719 2-1/8 1-1/16
3/16 304012 .1875 2-3/16 1-1/8
13/64 304013 .2031 2-1/4 1-3/16
7/32 304014 .2188 2-3/8 1-1/4
15/64 304015 .2344 2-7/16 1-5/16
1/4 304016 .2500 2-1/2 1-3/8
17/64 304017 .2656 2-5/8 1-7/16
9/32 304018 .2812 2-11/16 1-1/2
19/64 304019 .2969 2-3/4 1-9/16
5/16 304020 .3125 2-13/16 1-5/8
21/64 304021 .3281 2-15/16 1-11/16
11/32 304022 .3438 3 1-11/16
23/64 304023 .3594 3-1/16 1-3/4
3/8 304024 .3750 3-1/8 1-13/16
25/64 304025 .3906 3-1/4 1-7/8
13/32 304026 .4062 3-5/16 1-15/16
27/64 304027 .4219 3-3/8 2
7/16 304028 .4375 3-7/16 2-1/16
29/64 304029 .4531 3-9/16 2-1/8
15/32 304030 .4688 3-5/8 2-1/8
31/64 304031 .4844 3-11/16 2-3/16
1/2 304032 .5000 3-3/4 2-1/4
Wire Gauge Sizes
catalog page: 23
Size Part Number Decimal Equivalent Overall Length Flute Length
1 305801 .2280 2-7/16 1-5/16
2 305802 .2210 2-7/16 1-5/16
3 305803 .2130 2-3/8 1-1/4
4 305804 .2090 2-3/8 1-1/4
5 305805 .2055 2-3/8 1-1/4
6 305806 .2040 2-3/8 1-1/4
7 305807 .2010 2-1/4 1-3/16
8 305808 .1990 2-1/4 1-3/16
9 305809 .1960 2-1/4 1-3/16
10 305810 .1935 2-1/4 1-3/16
11 305811 .1910 2-1/4 1-3/16
12 305812 .1890 2-1/4 1-3/16
13 305813 .1850 2-3/16 1-1/8
14 305814 .1820 2-3/16 1-1/8
15 305815 .1800 2-3/16 1-1/8
16 305816 .1770 2-3/16 1-1/8
17 305817 .1730 2-3/16 1-1/8
18 305818 .1695 2-1/8 1-1/16
19 305819 .1660 2-1/8 1-1/16
20 305820 .1610 2-1/8 1-1/16
21 305821 .1590 2-1/8 1-1/16
22 305822 .1570 2-1/8 1-1/16
23 305823 .1540 2-1/16 1
24 305824 .1520 2-1/16 1
25 305825 .1495 2-1/16 1
26 305826 .1470 2-1/16 1
27 305827 .1440 2-1/16 1
28 305828 .1405 1-15/16 15/16
29 305829 .1360 1-15/16 15/16
30 305830 .1285 1-15/16 15/16
31 305831 .1200 1-7/8 7/8
32 305832 .1160 1-7/8 7/8
33 305833 .1130 1-7/8 7/8
34 305834 .1110 1-7/8 7/8
35 305835 .1100 1-7/8 7/8
36 305836 .1065 1-13/16 13/16
37 305837 .1040 1-13/16 13/16
38 305838 .1015 1-13/16 13/16
39 305839 .0995 1-13/16 13/16
40 305840 .0980 1-13/16 13/16
41 305841 .0960 1-13/16 13/16
42 305842 .0935 1-3/4 3/4
43 305843 .0890 1-3/4 3/4
44 305844 .0860 1-3/4 3/4
45 305845 .0820 1-3/4 3/4
46 305846 .0810 1-3/4 3/4
47 305847 .0785 1-11/16 11/16
48 305848 .0760 1-11/16 11/16
49 305849 .0730 1-11/16 11/16
50 305850 .0700 1-11/16 11/16
51 305851 .0670 1-11/16 11/16
52 305852 .0635 1-11/16 11/16
53 305853 .0595 1-5/8 5/8
54 305854 .0550 1-5/8 5/8
55 305855 .0520 1-5/8 5/8
56 305856 .0465 1-3/8 1/2
57 305857 .0430 1-3/8 1/2
58 305858 .0420 1-3/8 1/2
59 305859 .0410 1-3/8 1/2
60 305860 .0400 1-3/8 1/2
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