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# Thread: All of Those Scrap Drill Bits!

1. ## All of Those Scrap Drill Bits!

Do you have a tub full of unmarked and dull drill bits? Besides adding to the pile, what do you do with them?

If you are interested, please see

http://rick.sparber.org/DBSS.pdf

Your comments are welcome. All of us are smarter than any one of us.

Thanks,

Rick

2. ## The Following User Says Thank You to rgsparber For This Useful Post:

Seedtick (Oct 2, 2017)

3. Two remarks...

Many drills are slightly tapered so the shank is slightly smaller in diameter than the tip. You may want to keep that in mind when measuring.

The DRILL program on my site has an option ('D' in the menu) to find a drill "name" given the diameter. As an example, I entered a measured diameter of 0.281" and the program output looks like this...

**************************************************************

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
Q Quit (Esc also)
(D,S,T,F,X,H,M,Q) ? D

{[d].dd or [d-]d/d (e.g. 1.5 or 1-1/2)} Hole Size ? 0.281

(7.00 mm) with size 0.2756 (-0.0054)
(J) with size 0.2770 (-0.0040)
(7.10 mm) with size 0.2795 (-0.0015)
***** (K) with size 0.2810 (+0.0000) *****
(9/32) with size 0.2812 (+0.0002)
(7.20 mm) with size 0.2835 (+0.0025)
(7.25 mm) with size 0.2854 (+0.0044)

**************************************************************

As you can see, it correctly identified it as a 'K' drill and also shows the three closest larger and smaller drills. If the user has other "named" drills than those in the data file delivered with the program, he can easily add them to that ASCII file.

Folks sorting drills at their desks may find this easier to use than a chart.

I can't resist my urge to point out that, if we used the metric system (or at least a rational nomenclature in the inferial system), none of this screwing around would be necessary. When I'm king, naming a drill anything but its size will be a capital offense. (Same for wire and sheet.)

4. ## The Following User Says Thank You to mklotz For This Useful Post:

Y-geo (Oct 6, 2017)

5. I was thinking your charts looked difficult, then I worked out that your starting point is imperial. Having grown up here in a metric Australia I start with metric sizes and "fit" the imperial sizes between. I have several sets of drills in different measuring systems and material, metric 0.5 rises and 0.1mm rises from 1-10mm, imp fractional and number and letter but I always think of the sizes in metric terms as that is my native language for want of a better term.
I am just trying to come up with a better storage method for my Morse Taper drills above 13mm and 1/2" and am considering large boards and using a scale making larger sizes further from the start of the board and in different rows. Metric full mm first row then metric 0.5mm rises second row then fractional rises then anything else in another row. I would label all the positions and that might also act as a rough size chart for general drilling for tapping or reaming. Anyone have other ideas?

6. I was cleaning out various tool chests and boxes and found quite a load of drill bits. I was really surprised by how many can accumulate over years. I was a toolmaker & machinist at different times, but I had fewer in those boxes than my mechanics boxes.
Many drill bits are imprinted with the size near the clamping end. With a magnifying glass and light, those were identified and sorted. There were several new or good ones, so they were put in a different place to refill my indexes. What couldn't be read, I used a micrometer to read just back from the tip and across the cutting edges. I had available a simple drill chart card that gave the decimal size of all drill bits, metric and imperial. I believe on larger (>0.5") sizes, I used digital calipers that read metric and imperial at the push of a button.
What I don't have yet is a Drill Doctor. I have intentions of getting one. I've looked at the various models before, but have forgotten which was right for me. I have left and right twist, and a few larger than 1".
Besides a somewhat similar method, my end result looked just like yours, Rick. I taped the size to the bits, then bundled like sizes together.

7. Originally Posted by Burner
I was thinking your charts looked difficult, then I worked out that your starting point is imperial. Having grown up here in a metric Australia I start with metric sizes and "fit" the imperial sizes between. I have several sets of drills in different measuring systems and material, metric 0.5 rises and 0.1mm rises from 1-10mm, imp fractional and number and letter but I always think of the sizes in metric terms as that is my native language for want of a better term.
I wish my world was predominantly metric but that is not reality. Having to deal with letter, number, and fractional is nuts.

Rick

8. Years before I coded my DRILL program, I put together a chart of drills, metric and inferial, ordered by size, including indications of tap drills for 75% DOT on most of the inferial taps. It's shown below but if anyone wants a copy of it, just email me and I'll send you a copy.

Code:
```                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```

Originally Posted by rgsparber
Do you have a tub full of unmarked and dull drill bits? Besides adding to the pile, what do you do with them?

If you are interested, please see

http://rick.sparber.org/DBSS.pdf

Your comments are welcome. All of us are smarter than any one of us.

Thanks,

Rick
I had a few drawers of mixed up drill bits and they were less than useful any time I needed to drill a hole because I would have to look through all of them to find the size I needed. So one day I organized them all by size and made some simple index holders out of cut up plastic I got off jugs and hot glued to cardboard.

This is what some of those look like: http://i.imgur.com/az1SUzJ.jpg

I did something similar earlier with a bunch of my mixed taps too.

https://www.instructables.com/id/Pla...der-Revisited/

Organization pays off.

10. ## The Following User Says Thank You to pfredX1 For This Useful Post:

Y-geo (Oct 6, 2017)

11. very nice Fred, great idea and easy to make.

12. Marv
I would love to have your file.

ncollar1957__________(AT)______________gmail_____________(DOT) _________________com

13. Thanks. Sifting through disorganized tools is not only a waste of time, it also breaks concentration, so work suffers for it. It is a total buzz kill in the shop.

14. ## The Following 3 Users Say Thank You to pfredX1 For This Useful Post:

Captainleeward (Nov 14, 2017), Jon (Oct 3, 2017), Y-geo (Oct 6, 2017)

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