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Often, I just want to know the closest drill size. Doesn't matter to me if it is fractional, number, letter, or metric. This search occurs often enough that I sat down and found a way that works best for me. Maybe it will help you too.
If you are interested, please see
https://rick.sparber.org/FastAccessD...bleArticle.pdf
Your comments are welcome. All of us are smarter than any one of us.
Thanks,
Rick
Thanks for that clever technique, Rick. Years ago I made a more conventional chart. Since all the required drill size data was already computerized as part of the work on my webpage, I simply wrote a program to meld all the sizes for all the crazy, inferial drill names with the metric sizes to create a single chart of sequential drill sizes, smallest to largest.
The chart is shown below. Folks who would like a copy can email me and I'll send one along.
Code:
Drill Sizes:
97 0.0059
96 0.0063
95 0.0067
94 0.0071
93 0.0075
92 0.0079
91 0.0083
90 0.0087
89 0.0091
88 0.0095
87 0.0100
86 0.0105
85 0.0110
84 0.0115
83 0.0120
82 0.0125
81 0.0130
80 0.0135
79 0.0145
1/64.......... 0.0156
78 0.0160
77 0.0180
76 0.0200
75 0.0210
74 0.0225
73 0.0240
72 0.0250 000-120
71 0.0260
70 0.0280
69 0.0292
68 0.0310
1/32........ 0.0313
0.8 mm 0.0315
67 0.0320
66 0.0330
65 0.0350
0.9 mm 0.0354
64 0.0360 00-90
63 0.0370
62 0.0380
61 0.0390
1.0 mm 0.0394
60 0.0400
59 0.0410
58 0.0420
57 0.0430
1.1 mm 0.0433
56 0.0465
3/64.......... 0.0469 0-80
1.2 mm 0.0472
1.3 mm 0.0512
55 0.0520
54 0.0550 1-56
1.4 mm 0.0551
1.5 mm 0.0591
53 0.0595 1-64,72
1/16...... 0.0625
1.6 mm 0.0630
52 0.0635
1.7 mm 0.0669
51 0.0670
50 0.0700 2-56,64
1.8 mm 0.0709
49 0.0730
1.9 mm 0.0748
48 0.0760
5/64.......... 0.0781
47 0.0785 3-48
2.0 mm 0.0787
46 0.0810
45 0.0820 3-56,4-32
2.1 mm 0.0827
44 0.0860 4-36
2.2 mm 0.0866
43 0.0890 4-40
2.3 mm 0.0906
42 0.0935 4-48
3/32........ 0.0938
2.4 mm 0.0945
41 0.0960
40 0.0980
2.5 mm 0.0984
39 0.0995
38 0.1015 5-40
2.6 mm 0.1024
37 0.1040 5-44
2.7 mm 0.1063
36 0.1065 6-32
7/64.......... 0.1094
35 0.1100
2.8 mm 0.1102
34 0.1110 6-36
33 0.1130 6-40
2.9 mm 0.1142
32 0.1160
3.0 mm 0.1181
31 0.1200
3.1 mm 0.1220
1/8---- 0.1250
3.2 mm 0.1260
30 0.1285
3.3 mm 0.1299
3.4 mm 0.1339
29 0.1360 8-32,36
3.5 mm 0.1378
28 0.1405 8-40
9/64.......... 0.1406
3.6 mm 0.1417
27 0.1440
3.7 mm 0.1457
26 0.1470
25 0.1495 10-24
3.8 mm 0.1496
24 0.1520
3.9 mm 0.1535
23 0.1540
5/32........ 0.1562
22 0.1570 10-30
4.0 mm 0.1575
21 0.1590 10-32
20 0.1610
4.1 mm 0.1614
4.2 mm 0.1654
19 0.1660
4.3 mm 0.1693
18 0.1695
11/64.......... 0.1719
17 0.1730
4.4 mm 0.1732
16 0.1770 12-24
4.5 mm 0.1772
15 0.1800
4.6 mm 0.1811
14 0.1820 12-28
13-4.7 mm 0.1850 12-32
3/16...... 0.1875
12-4.8 mm 0.1890
11 0.1910
4.9 mm 0.1929
10 0.1935
9 0.1960
5.0 mm 0.1969
8 0.1990
5.1 mm 0.2008
7 0.2010 1/4-20
13/64.......... 0.2031
6 0.2040
5.2 mm 0.2047
5 0.2055
5.3 mm 0.2087
4 0.2090
5.4 mm 0.2126
3 0.2130 1/4-28
5.5 mm 0.2165
7/32........ 0.2188
5.6 mm 0.2205
2 0.2210
5.7 mm 0.2244
1 0.2280
5.8 mm 0.2283
5.9 mm 0.2323
A 0.2340
15/64.......... 0.2344
6.0 mm 0.2362
B 0.2380
6.1 mm 0.2402
C 0.2420
6.2 mm 0.2441
D 0.2460
6.3 mm 0.2480
E-1/4 0.2500
6.4 mm 0.2520
6.5 mm 0.2559
F 0.2570 5/16-18
6.6 mm 0.2598
G 0.2610
6.7 mm 0.2638
17/64.......... 0.2656
H 0.2660
6.8 mm 0.2677
6.9 mm 0.2717
I 0.2720 5/16-24
7.0 mm 0.2756
J 0.2770
7.1 mm 0.2795
K 0.2810
9/32........ 0.2812
7.2 mm 0.2835
7.3 mm 0.2874
L 0.2900
7.4 mm 0.2914
M 0.2950
7.5 mm 0.2953
19/64.......... 0.2969
7.6 mm 0.2992
N 0.3020
7.7 mm 0.3031
5/16...... 0.3125 3/8-16
8.0 mm 0.3150
O 0.3160
P 0.3230
21/64.......... 0.3281
Q 0.3320 3/8-24
8.5 mm 0.3346
R 0.3390
11/32........ 0.3438
S 0.3480
9.0 mm 0.3543
T 0.3580
23/64.......... 0.3594
U 0.3680 7/16-14
9.5 mm 0.3740
3/8---- 0.3750
V 0.3770
W 0.3860
25/64.......... 0.3906 7/16-20
10.0 mm 0.3937
X 0.3970
Y 0.4040
13/32........ 0.4062
Z 0.4130
27/64.......... 0.4219 1/2-13
7/16...... 0.4375
29/64.......... 0.4531 1/2-20
15/32........ 0.4688
31/64.......... 0.4844 9/16-12
1/2 0.5000
33/64.......... 0.5156 9/16-18
17/32........ 0.5313
35/64.......... 0.5469
9/16...... 0.5625
37/64.......... 0.5781
19/32........ 0.5938
39/64.......... 0.6094
5/8---- 0.6250
41/64.......... 0.6406
21/32........ 0.6562
43/64.......... 0.6719
11/16...... 0.6875
45/64.......... 0.7031
23/32........ 0.7188
47/64.......... 0.7344
3/4== 0.7500
49/64.......... 0.7656
25/32........ 0.7812
51/64.......... 0.7969
13/16...... 0.8125
53/64.......... 0.8281
27/32........ 0.8438
55/64.......... 0.8594
7/8---- 0.8750
57/64.......... 0.8906
29/32........ 0.9062
59/64.......... 0.9219
15/16...... 0.9375
61/64.......... 0.9531
31/32........ 0.9688
63/64.......... 0.9844
1 in 1.0000
1-3/64.......... 1.0469
1-7/64.......... 1.1094
1-1/8---- 1.1250
1-11/64.......... 1.1719
1-7/32........ 1.2188
1-1/4== 1.2500
1-19/64.......... 1.2969
1-11/32........ 1.3438
1-3/8---- 1.3750
1-27/64.......... 1.4219
1-1/2 1.5000
"Thanks for that clever technique, Rick. Years ago I made a more conventional chart. Since all the required drill size data was already computerized as part of the work on my webpage, I simply wrote a program to meld all the sizes for all the crazy, inferial drill names with the metric sizes to create a single chart of sequential drill sizes, smallest to largest."
Marv,
Maybe it is just me, but I'm faster with a two dimensional search than with a linear one.
Just curious, but did you try out my table with a random hole size?
Rick
Yes, I did and it works well.Quote:
Originally Posted by rgsparber
Despite many years spent with matrix algebra, my mind remains firmly linear.
Rick and Marv,
Great set of tables and I made a similar table for finding the best press fit holes sizes under 1/2" dia. I kept in a clear vinyl sleeve.
However, a few years ago I invested in buying the Calculated Industries Machinist Calc Pro for less than $40 when at sale at Enco. It has an extensive set of calculations and table look-ups. My calculator version is no longer available and they now have a more expensive version that includes specifying the materials to be machined. Nonetheless, I still use the drill size feature the most using the "+" or "-" key to find drill sizes larger or smaller than the exact drill size for press or sliding fits.
I also like the free Android phone apps "Knurling Calculator" and "Machinist Buddy" (has a lot of calculations and reference tables).
Regards,
Paul
My DRILL program from my website does something similar. Below is a sample output hunting a drill to drill a 0.372 hole...
number of drills read from data file = 371
D find Drill designation given hole size
S find hole Size given drill designation
T find Tapdrill for any tap and dot
F find tapdrill for thread-Forming tap
X step drilling calculations
H display this Help/Menu
M display this Help/Menu
Q Quit (Esc also)
(D,S,T,F,X,H,M,Q) ?
{[d].dd or [d-]d/d (e.g. 1.5 or 1-1/2)} Hole Size ? 0.372
(9.25 mm) with size 0.3642 (-0.0078)
(9.30 mm) with size 0.3661 (-0.0059)
(U) with size 0.3680 (-0.0040)
***** (9.40 mm) with size 0.3701 (-0.0019) *****
(9.50 mm) with size 0.3740 (+0.0020)
(3/8) with size 0.3750 (+0.0030)
(V) with size 0.3770 (+0.0050)
(D,S,T,F,X,H,M,Q) ?
Thanks Rick! We've added your Drill Size Table to our Measuring and Marking category, as well as to your builder page: Rick's Homemade Tools. Your receipt:
<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="http://www.homemadetools.net/homemade-drill-size-table"><img src="http://www.homemadetools.net/uploads/220772/homemade-drill-size-table.jpeg"/></a></div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="http://www.homemadetools.net/homemade-drill-size-table">Drill Size Table</a> <span> by <a href="/builder/Rick+Sparber">Rick Sparber</a></span> </div> <div class="tags">tags: <a href="http://www.homemadetools.net/tag/drill-bit">drill bit</a></div> </div> </div> </div>