U.S. Jobber Length Twist Drill Sizes




Automatic Drill Units, Pneumatic Drills, Multiple Spindle Drills


<
Size Diameter Overall Length
inch		 Flute Length
inch
U.S. Metric inch mm
97 0.15 0.0059 0.150 3/4 1/16
96 0.16 0.0063 0.160 3/4 1/16
95 0.17 0.0067 0.170 3/4 1/16
94 0.18 0.0071 0.180 3/4 1/16
93 0.20 0.0075 0.200 3/4 1/16
92 0.20 0.0079 0.200 3/4 1/16
91   0.0083 0.211 3/4 5/64
90 0.22 0.0087 0.221 3/4 5/64
89   0.0091 0.231 3/4 5/64
88   0.0095 0.241 3/4 5/64
  0.25 0.0098 0.250 3/4 5/64
87   0.0100 0.254 3/4 5/64
86   0.0105 0.267 3/4 3/32
85 0.28 0.0110 0.280 3/4 3/32
84   0.0115 0.292 3/4 3/32
  0.30 0.0118 0.300 3/4 3/32
83   0.0120 0.305 3/4 3/32
82   0.0125 0.138 3/4 3/32
  0.32 0.0126 0.320 3/4 3/32
81   0.0130 0.330 3/4 3/32
80   0.0135 0.343 3/4 1/8
  0.35 0.0138 0.350 3/4 1/8
79   0.0145 0.368 3/4 1/8
  0.38 0.0150 0.380 3/4 3/16
1/64   0.0156 0.396 3/4 3/16
  0.40 0.0157 0.400 3/4 3/16
78   0.0160 0.406 7/8 3/16
  0.42 0.0165 0.420 7/8 3/16
  0.45 0.0177 0.450 7/8 3/16
77   0.0180 0.457 7/8 3/16
  0.48 0.0189 0.480 7/8 3/16
  0.50 0.0197 0.500 7/8 3/16
76   0.0200 0.508 7/8 3/16
75   0.0210 0.533 1 1/4
  0.55 0.0217 0.550 1 1/4
74   0.0225 0.572 1 1/4
  0.60 0.0236 0.600 1 1/8 5/16
73   0.0240 0.610 1 1/8 5/16
72   0.0250 0.635 1 1/8 5/16
  0.65 0.0256 0.650 1 1/4 3/8
71   0.0260 0.660 1 1/4 3/8
  0.70 0.0276 0.700 1 1/4 3/8
70   0.0280 0.711 1 1/4 3/8
69   0.0292 0.742 1 3/8 1/2
  0.75 0.0295 0.750 1 3/8 1/2
68   0.0310 0.787 1 3/8 1/2
1/32   0.0312 0.792 1 3/8 1/2
  0.80 0.0315 0.800 1 3/8 1/2
67   0.0320 0.813 1 3/8 1/2
66   0.0330 0.838 1 3/8 1/2
  0.85 0.0335 0.850 1 1/2 5/8
65   0.0350 0.889 1 1/2 5/8
  0.90 0.0354 0.899 1 1/2 5/8
64   0.0360 0.914 1 1/2 5/8
63   0.0370 0.940 1 1/2 5/8
  0.95 0.0374 0.950 1 1/2 5/8
62   0.0380 0.965 1 1/2 5/8
61   0.0390 0.991 1 5/8 11/16
  1.00 0.0394 1.00 1 5/8 11/16
60   0.0400 1.016 1 5/8 11/16
59   0.0410 1.041 1 5/8 11/16
  1.05 0.0413 1.050 1 5/8 11/16
58   0.0420 1.067 1 5/8 11/16
57   0.0430 1.092 1 3/4 3/4
  1.10 0.0433 1.100 1 3/4 3/4
  1.15 0.0453 1.150 1 3/4 3/4
56   0.0465 1.181 1 3/4 3/4
3/64   0.0469 1.191 1 3/4 3/4
  1.20 0.0472 1.200 1 7/8 7/8
  1.25 0.0492 1.250 1 7/8 7/8
  1.30 0.0512 1.300 1 7/8 7/8
55   0.0520 1.321 1 7/8 7/8
  1.35 0.0531 1.350 1 7/8 7/8
54   0.0550 1.397 1 7/8 7/8
  1.40 0.0551 1.400 17/8 7/8
  1.45 0.0571 1.450 1 7/8 7/8
  1.50 0.0591 1.500 1 7/8 7/8
53   0.0595 1.511 1 7/8 7/8
  1.55 0.0610 1.550 1 7/8 7/8
1/16   0.0625 1.588 1 7/8 7/8
  1.60 0.0630 1.600 1 7/8 7/8
52   0.0635 1.613 1 7/8 7/8
  1.65 0.0650 1.650 2 1
  1.70 0.0669 1.700 2 1
51   0.0670 1.702 2 1
  1.75 0.0689 1.750 2 1
50   0.0700 1.778 2 1
  1.80 0.0709 1.800 2 1
  1.85 0.0728 1.850 2 1
49   0.0730 1.854 2 1
  1.90 0.0748 1.900 2 1
48   0.0760 1.930 2 1
  1.95 0.0768 1.950 2 1
5/64   0.0781 1.984 2 1
47   0.0785 1.994 2 1
  2.00 0.0787 2.000 2 1
  2.05 0.0807 2.050 2 1/8 1 1/8
46   0.0810 2.057 2 1/8 1 1/8
45   0.0820 2.083 2 1/8 1 1/8
  2.10 0.0827 2.100 2 1/8 1 1/8
  2.15 0.0846 2.150 2 1/8 1 1/8
44   0.0860 2.184 2 1/8 1 1/8
  2.20 0.0866 2.200 2 1/4 1 1/4
  2.25 0.0886 2.250 2 1/4 1 1/4
43   0.0890 2.261 2 1/4 1 1/4
  2.30 0.0906 2.300 2 1/4 1 1/4
  2.35 0.0925 2.350 2 1/4 1 1/4
42   0.0935 2.375 2 1/4 1 1/4
3/32   0.0938 2.383 2 1/4 1 1/4
  2.40 0.0945 2.400 2 3/8 1 3/8
41   0.0960 2.438 2 3/8 1 3/8
  2.45 0.0965 2.450 2 3/8 1 3/8
40   0.0980 2.489 2 3/8 1 3/8
  2.50 0.0984 2.500 2 3/8 1 3/8
39   0.0995 2.527 2 3/8 1 3/8
38   0.1015 2.578 2 1/2 1 7/16
  2.60 0.1024 2.600 2 1/2 1 7/16
37   0.1040 2.642 2 1/2 1 7/16
  2.70 0.1063 2.700 2 1/2 1 7/16
36   0.1065 2.705 2 1/2 1 7/16
7/64   0.1094 2.779 2 5/8 1 1/2
35   0.1100 2.794 2 5/8 1 1/2
  2.80 0.1102 2.800 2 5/8 1 1/2
34   0.1110 2.819 2 5/8 1 1/2
33   0.1130 2.870 2 5/8 1 1/2
  2.90 0.1142 2.900 2 3/4 1 5/8
32   0.1160 2.946 2 3/4 1 5/8
  3.00 0.1181 3.000 2 3/4 1 5/8
31   0.1200 3.048 2 3/4 1 5/8
  3.10 0.1220 3.100 2 3/4 1 5/8
1/8   0.1250 3.0175 2 3/4 1 5/8
  3.20 0.1260 3.200 2 3/4 1 5/8
30   0.1285 3.264 2 3/4 1 5/8
  3.30 0.1299 3.300 2 7/8 1 3/4
  3.40 0.1339 3.400 2 7/8 1 3/4
29   0.1360 3.454 2 7/8 1 3/4
  3.50 0.1378 3.500 2 7/8 1 3/4
28   0.1405 3.569 2 7/8 1 3/4
9/64   0.1406 3.571 2 7/8 1 3/4
  3.60 0.1417 3.600 3 1 7/8
27   0.1440 3.658 3 1 7/8
  3.70 0.1457 3.700 3 1 7/8
26   0.1470 3.734 3 1 7/8
25   0.1495 3.797 3 1 7/8
  3.80 0.1496 3.800 3 1 7/8
24   0.1520 3.861 3 1/8 2
  3.90 0.1535 3.900 3 1/8 2
23   0.1540 3.912 3 1/8 2
5/32   0.1562 3.967 3 1/8 2
22   0.1570 3.988 3 1/8 2
  4.00 0.1575 4.000 3 1/4 2 1/8
21   0.1590 4.039 3 1/4 2 1/8
20   0.1610 4.089 3 1/4 2 1/8
  4.10 0.1614 4.100 3 1/4 2 1/8
  4.20 0.1654 4.200 3 1/4 2 1/8
19   0.1660 4.2163 1/4 2 1/8
  4.30 0.1693 4.300 3 1/4 2 1/8
18   0.1695 4.305 3 1/4 2 1/8
11/64   0.1719 4.366 3 1/4 2 1/8
17   0.1730 4.394 3 3/8 2 3/16
  4.40 0.1732 4.400 3 3/8 2 3/16
16   0.1770 4.496 3 3/8 2 3/16
  4.50 0.1772 4.500 3 3/8 2 3/16
15   0.1800 4.572 3 3/8 2 3/16
  4.60 0.1811 4.600 3 3/8 2 3/16
14   0.1820 4.623 3 3/8 2 3/16
13 4.70 0.1850 4.700 3 1/2 2 5/16
3/16   0.1875 4.762 3 1/2 2 5/16
12 4.80 0.1890 4.800 3 1/2 2 5/16
11   0.1910 4.851 3 1/2 2 5/16
  4.90 0.1929 4.900 3 5/8 2 7/16
10   0.1935 4.915 3 5/8 2 7/16
9   0.1960 4.978 3 5/8 2 7/16
  5.00 0.1969 5.000 3 5/8 2 7/16
8   0.1990 5.054 3 5/8 2 7/16
  5.10 0.2008 5.100 3 5/8 2 7/16
7   0.2010 5.105 3 5/8 2 7/16
13/64   0.2031 5.159 3 5/8 2 7/16
6   0.2040 5.182 3 3/4 2 1/2
  5.20 0.2047 5.200 3 3/4 2 1/2
5   0.2055 5.220 3 3/4 2 1/2
  5.30 0.2087 5.300 3 3/4 2 1/2
4   0.2090 5.309 3 3/4 2 1/2
  5.40 0.2126 5.400 3 3/4 2 1/2
3   0.2130 5.410 3 3/4 2 1/2
  5.50 0.2165 5.500 3 3/4 2 1/2
7/32   0.2188 5.558 3 3/4 2 1/2
  5.60 0.2205 5.600 3 7/8 2 5/8
2   0.2210 5.613 3 7/8 2 5/8
  5.70 0.2244 5.700 3 7/8 2 5/8
1   0.2280 5.791 3 7/8 2 5/8
  5.80 0.2283 5.800 3 7/8 2 5/8
  5.90 0.2323 5.600 3 7/8 2 5/8
A   0.2340 5.944 3 7/8 2 5/8
15/64   0.2344 5.954 3 7/8 2 5/8
  6.00 0.2362 6.000 4 2 3/4
B   0.2380 6.045 4 2 3/4
  6.10 0.2402 6.100 4 2 3/4
C   0.2420 6.147 4 2 3/4
  6.20 0.2441 6.200 4 2 3/4
D   0.2460 6.248 4 2 3/4
  6.30 0.2480 6.300 4 2 3/4
E, 1/4   0.2500 6.350 4 2 3/4
  6.40 0.2520 6.400 4 1/8 2 7/8
  6.50 0.2559 6.500 4 1/8 2 7/8
F   0.2570 6.528 4 1/8 2 7/8
  6.60 0.2598 6.600 4 1/8 2 7/8
G   0.2610 6.629 4 1/8 2 7/8
  6.70 0.2638 6.700 4 1/8 2 7/8
17/64   0.2656 6.746 4 1/8 2 7/8
H   0.2660 6.756 4 1/8 2 7/8
  6.80 0.2677 6.800 4 1/8 2 7/8
  6.90 0.2717 6.900 4 1/8 2 7/8
I   0.2720 6.909 4 1/8 2 7/8
  7.00 0.2756 7.000 4 1/8 2 7/8
J   0.2770 7.036 4 1/8 2 7/8
  7.10 0.2795 7.100 4 1/4 2 15/16
K   0.2810 7.137 4 1/4 2 15/16
9/32   0.2812 7.142 4 1/4 2 15/16
  7.20 0.2835 7.200 4 1/4 2 15/16
  7.30 0.2874 7.300 4 1/4 2 15/16
L   0.2900 7.366 4 1/4 2 15/16
  7.40 0.2913 7.400 4 3/8 3 1/16
M   0.2950 7.493 4 3/8 3 1/16
  7.50 0.2953 7.500 4 3/8 3 1/16
19/64   0.2969 7.541 4 3/8 3 1/16
  7.60 0.2992 7.600 4 3/8 3 1/16
N   0.3020 7.671 4 3/8 3 1/16
  7.70 0.3031 7.700 4 1/2 3 3/16
  7.80 0.3071 7.800 4 1/2 3 3/16
  7.90 0.3110 7.900 4 1/2 3 3/16
5/16   0.3125 7.938 4 1/2 3 3/16
  8.00 0.3150 8.000 4 1/2 3 3/16
O   0.3160 8.026 4 1/2 3 3/16
  8.10 0.3189 8.100 4 5/8 3 5/16
  8.20 0.3228 8.200 4 5/8 3 5/16
P   0.3230 8.204 4 5/8 3 5/16
  8.30 0.3268 8.300 4 5/8 3 5/16
21/64   0.3281 8.334 4 5/8 3 5/16
8.40 0.3307 8.400 4 3/4 3 7/16
Q   0.3320 8.433 4 3/4 3 7/16
  8.50 0.3346 8.500 4 3/4 3 7/16
  8.60 0.3386 8.600 4 3/4 3 7/16
R   0.3390 8.611 4 3/4 3 7/16
  8.70 0.3425 8.700 4 3/4 3 7/16
11/32   0.3438 8.733 4 3/4 3 7/16
  8.80 0.3465 8.800 4 7/8 3 1/2
S   0.3480 8.839 4 7/8 3 1/2
  8.90 0.3504 8.900 4 7/8 3 1/2
  9.00 0.3543 9.000 4 7/8 3 1/2
T   0.3580 9.093 4 7/8 3 1/2
  9.10 0.3583 9.100 4 7/8 3 1/2
23/64   0.3594 9.129 4 7/8 3 1/2
  9.20 0.3622 9.200 5 3 5/8
  9.30 0.3661 9.300 5 3 5/8
U   0.3680 9.347 5 3 5/8
  9.40 0.3701 9.400 5 3 5/8
  9.50 0.3740 9.500 5 3 5/8
3/8   0.3750 9.525 5 3 5/8
V   0.3770 9.576 5 3 5/8
  9.60 0.3780 9.600 5 1/8 3 3/4
  9.70 0.3819 9.700 5 1/8 3 3/4
  9.80 0.3858 9.800 5 1/8 3 3/4
W   0.3860 9.804 5 1/8 3 3/4
  9.90 0.3898 9.900 5 1/8 3 3/4
25/64   0.3906 9.921 5 1/8 3 3/4
  10.00 0.3937 10.00 5 1/8 3 3/4
X   0.3970 10.084 5 1/8 3 3/4
  10.20 0.4016 10.200 5 1/4 3 7/8
Y   0.4040 10.262 5 1/4 3 7/8
13/32   0.4062 10.317 5 1/4 3 7/8
Z   0.4130 10.490 5 1/4 3 7/8
  10.50 0.4134 10.500 5 1/4 3 7/8
27/64   0.4219 10.716 5 3/8 3 15/16
  10.80 0.4252 10.800 5 1/2 4 1/16
  11.00 0.4331 11.000 5 1/2 4 1/16
7/16   0.4375 11.112 5 1/2 4 1/16
  11.20 0.4409 11.200 5 5/8 4 3/16
  11.50 0.4528 11.500 5 5/8 4 3/16
29/64   0.4531 11.509 5 5/8 4 3/16
  11.80 0.4646 11.800 5 3/4 4 5/16
15/32   0.4688 11.908 5 3/4 4 5/16
  12.00 0.4724 12.000 5 7/8 4 3/8
  12.20 0.4803 12.200 5 7/8 4 3/8
31/64   0.4844 12.304 5 7/8 4 3/8
  12.50 0.4921 12.500 6 4 1/2
1/2   0.500 12.700 6 4 1/2




Multi-Drill Home Page





























AutoDrill can provide replacement drilling heads for Commander, Johnson, Ettco, Centerline Centroid and many more. Our prices make rebuilding Commander, Johnson, Ettco, Centerline Centroid and many other brand multiple spindle heads uneconomical. When you need a replacement head for Commander, Johnson, Ettco or Centerline Centroid multi-spindle drill or tapping heads call AutoDrill.


AutoDrill
1221 US Hwy 22
Lebanon, NJ  08833
Ph. 800-871-5022
Intl.Ph. 01-908-542-0244
Fax: 908-542-0242

Send E-Mail
Multi-Spindle Products
Drill Head Applications
Multiple Drill Head Accessories
Adjustable Head Selection
Application Examples
Tooling Information
Multi-Drill Application Sheet
Stock Spindle Heads
Multi-Drill Literature
Multi-Head CAD Drawings
Request Multi-Spindle Drill Head Information

self feed drill headself feeding drill headautomatic drillmultiple spindle drill headproduction drillself feed drill headself feeding drill head