Piper Comanche PA-24 Service Manual page 104

Size Decimal Millimeter
Equiv. Equiv.
1/2 0.500 12.7000
31/64 0.4843 12.3031
15/32 0.4687 11.9062
29/64 0.4531 11.5094
7/16 0.4375 11.1125
27/64 0.4218 10.7156
Z 0.413 10.4902
13/32 0.4062 10.3187
Y 0.404 10.2616
X 0.397 10.0838
25/64 0.3906 9.9212
W 0.386 9.8044
V 0.377 9.5758
3/8 0.375 9.5250
U 0.368 9.3472
23/64 0.3593 9.1262
T 0.358 9.1281
S 0.346 8.7884
11/32 0.3437 8.7300
R 0.339 8.6106
Q 0.332 8.4328
21/64 0.3281 8.3337
P 0.323 8.2042
O 0.316 8.0264
5/16 0.3125 7.9375
N 0.302 7.6708
19/64 0.2968 7.5387
M 0.295 7.4930
L 0.290 7.3660
9/32 0.2812 7.1425
K 0.281 7.1374
J 0.277 7.0358
I 0.272 6.9088
H 0.266 6.7564
17/64 0.2656 6.7462
DRILL SIZES AVAILABLE
Drill may be obtained in regular sizes to a 4 inch diameter, and increase in 64ths of an inch. The regular metric drills vary from 2 to
76mm and increase in 0.5mm variations.
II - HANDLING AND SERVICING
PIPER COMANCHE SERVICE MANUAL
TABLE II-XI. DRILL SIZES
Decimal/Millimeter Equivalents of Drill Sizes From 1/2" to No. 80
Size Decimal Millimeter
Equiv. Equiv.
G 0.261 6.6294
F 0.257 6.5278
E-1/4 0.250 6.3500
D 0.246 6.2484
C 0.242 6.1468
B 0.238 6.0452
15/64 0.2343 5.9531
A 0.234 5.9436
1 0.228 5.7912
2 0.221 5.6134
7/32 0.2187 5.5562
3 0.213 5.4102
4 0.209 5.3086
5 0.2055 5.2197
6 0.204 5.1816
13/64 0.2031 5.1594
7 0.201 5.1054
8 0.199 5.0546
9 0.196 4.9784
10 0.1935 4.9149
11 0.191 4.8514
12 0.189 4.8006
3/16 0.1875 4.7625
13 0.185 4.699
14 0.182 4.6228
15 0.180 4.572
16 0.177 4.4958
17 0.173 4.3942
11/64 0.1718 4.3656
18 0.1695 4.3053
19 0.166 4.2164
20 0.161 4.0894
21 0.159 4.0386
22 0.157 3.9878
Size Decimal Millimeter
Equiv. Equiv.
5/32 0.1562 3.9687
23 0.154 3.9116
24 0.152 3.8608
25 0.1495 3.7973
26 0.147 3.7338
27 0.144 3.6576
9/64 0.1406 3.5719
28 0.1405 3.5687
29 0.136 3.4544
30 0.1285 3.2639
1/8 0.125 3.1750
31 0.120 3.048
32 0.116 2.9464
33 0.113 2.8702
34 0.111 2.8194
35 0.110 2.794
7/64 0.1093 2.7781
36 0.1065 2.7051
37 0.104 2.6416
38 0.1015 2.5781
39 0.1285 2.5273
40 0.098 2.4892
41 0.096 2.4384
3/32 0.0937 2.3812
42 0.0935 2.3749
43 0.089 2.2606
44 0.086 2.1844
45 0.082 2.0828
46 0.081 2.0574
47 0.0785 1.9939
5/64 0.0781 1.9844
48 0.076 1.9304
49 0.073 1.8542
50 0.070 1.778
1C26
Size Decimal Millimeter
Equiv. Equiv.
51 0.067 1.7018
52 0.0635 1.6129
1/16 0.0625 1.5875
53 0.0595 1.5113
54 0.055 1.397
55 0.052 1.3208
3/64 0.0468 1.1906
56 0.0465 1.1811
57 0.043 1.0922
58 0.042 1.0668
59 0.041 1.0414
60 0.040 1.016
61 0.039 0.9906
62 0.038 0.9652
63 0.037 0.9398
64 0.036 0.9144
65 0.035 0.899
66 0.033 0.8382
1/32 0.0312 0.7937
67 0.032 0.8128
68 0.031 0.7874
69 0.029 0.7366
70 0.028 0.7112
71 0.026 0.6604
72 0.025 0.635
73 0.024 0.0696
74 0.0229 0.58166
75 0.021 0.5334
76 0.020 0.508
77 0.018 0.4572
1/64 0.0156 0.3969
78 0.016 0.4064
79 0.0145 0.3683
80 0.0135 0.3429
04/01/09