Archive for April, 2012

Your Source for Automatic Drills, Multiple Spindle Heads, and more

Metric Prefixes

MetricPrefixesChart.pdf

METRIC PREFIXES
Prefix Symbol Multiplier
tera T 1,000,000,000,000
giga G 1,000,000,000
mega M 1,000,000
kilo k 1,000
hecto h 100
deka da 10
1
deci d .1
centi c .01
milli m .001
micro µ .000001
nano n .000000001
pico p .000000000001

Counterbored (Counter-Bored) Holes

CounterboredHolesChart.pdf

COUNTERBORED (COUNTER-BORE) HOLES
USA SOCKET-HEAD CAP SCREWS
SCREW  DIA A
COUNTERBORE DIA
B
COUNTERBORE DEPTH
C
COUNTERSINK DIA
D
CLEARANCE DIA
Normal Fit Close Fit
#0 1/8 .060 .074 #49 #51
#2 3/16 .086 .102 #36 3/32
#4 7/32 .112 .130 #29 1/8
#5 1/4 .125 .145 #23 9/64
#6 9/32 .138 .158 #18 #23
#8 5/16 .164 .188 #10 #15
#10 3/8 .190 .218 #2 #5
1/4 7/16 .250 .278 9/32 17/64
5/16 17/32 .312 .346 11/32 21/64
3/8 5/8 .375 .415 13/32 25/64
7/16 23/32 .438 .483 15/32 29/64
1/2 13/16 .500 .552 17/32 33/64
5/8 1 .625 .689 21/32 41/64
3/4 1-3/16 .750 .828 25/32 49/64
7/8 1-3/8 .875 .963 29/32 57/64
1 1-5/8 1.000 1.100 1-1/32 1-1/64
1-1/4 2 1.250 1.370 1-5/16 1-9/32
1-1/2 2-3/8 1.500 1.640 1-9/16 1-17/32
1-3/4 2-3/4 1.750 1.910 1-13/16 1-25/32
2 3-1/8 2.000 2.180 2-1/16 2-1/32

 

COUNTERBORED (COUNTER-BORE) HOLES
METRIC SOCKET-HEAD CAP SCREWS
M1.6 3.50mm 1.6mm 2.0mm 1.95mm 1.80mm
M2 4.40mm 2mm 2.6mm 2.40mm 2.20mm
M2.5 5.40mm 2.5mm 3.1mm 3.00mm 2.70mm
M3 6.50mm 3mm 3.6mm 3.70mm 3.40mm
M4 8.25mm 4mm 4.7mm 4.80mm 4.40mm
M5 9.75mm 5mm 5.7mm 5.80mm 5.40mm
M6 11.20mm 6mm 6.8mm 6.80mm 6.40mm
M8 14.50mm 8mm 9.2mm 8.80mm 8.40mm
M10 17.50mm 10mm 11.2mm 10.80mm 10.50mm
M12 19.50mm 12mm 14.2mm 13.00mm 12.50mm
M14 22.50mm 14mm 16.2mm 15.00mm 14.50mm
M16 25.50mm 16mm 18.2mm 17.00mm 16.50mm
M20 31.50mm 20mm 22.4mm 21.00mm 20.50mm
M24 37.50mm 24mm 26.4mm 25.00mm 24.50mm
M30 47.50mm 30mm 33.4mm 31.50mm 31.00mm
M36 56.50mm 36mm 39.4mm 37.50mm 37.00mm
M42 66.00mm 42mm 45.6mm 44.00mm 43.00mm
M48 75.00mm 48mm 52.6mm 50.00mm 49.00mm

US Drill Sizes Chart (Decimal and Metric)

USADrillSizesChart.pdf

Drill Decimal Metric Drill Decimal Metric Drill Decimal Metric Drill Decimal Metric
80 0.0135 0.34 40 0.098 2.49 2 0.221 5.61 3/8 0.375 9.53
79 0.0145 0.37 39 0.0995 2.53 1 0.228 5.79 V 0.377 9.58
1/64 0.0156 0.40 38 0.1015 2.58 A 0.234 5.94 W 0.386 9.80
78 0.016 0.41 37 0.104 2.64 15/64 0.2344 5.95 25/64 0.3906 9.92
77 0.018 0.46 36 0.1065 2.71 B 0.238 6.05 X 0.397 10.08
76 0.02 0.51 7/64 0.1094 2.78 C 0.242 6.15 Y 0.404 10.26
75 0.021 0.53 35 0.11 2.79 D 0.246 6.25 13/32 0.4062 10.32
74 0.0225 0.57 34 0.111 2.82 E 0.25 6.35 Z 0.413 10.49
73 0.024 0.61 33 0.113 2.87 1/4 0.25 6.35 27/64 0.4219 10.72
72 0.025 0.64 32 0.116 2.95 F 0.257 6.53 7/16 0.4375 11.11
71 0.026 0.66 31 0.12 3.05 G 0.261 6.63 29/64 0.4531 11.51
70 0.028 0.71 1/8 0.125 3.18 17/64 0.2656 6.75 15/32 0.4688 11.91
69 0.0292 0.74 30 0.1285 3.26 H 0.266 6.76 31/64 0.4844 12.30
68 0.031 0.79 29 0.136 3.45 I 0.272 6.91 1/2 0.5 12.70
1/32 0.0312 0.79 28 0.1405 3.57 J 0.277 7.04 33/64 0.5156 13.10
67 0.032 0.81 9/64 0.1406 3.57 K 0.281 7.14 17/32 0.5312 13.49
66 0.033 0.84 27 0.144 3.66 9/32 0.2812 7.14 35/64 0.5469 13.89
65 0.035 0.89 26 0.147 3.73 L 0.29 7.37 9/16 0.5625 14.29
64 0.036 0.91 25 0.1495 3.80 M 0.295 7.49 37/64 0.5781 14.68
63 0.037 0.94 24 0.152 3.86 19/64 0.2969 7.54 19/32 0.5938 15.08
62 0.038 0.97 23 0.154 3.91 N 0.302 7.67 39/64 0.6094 15.48
61 0.039 0.99 5/32 0.1562 3.97 5/16 0.3125 7.94 5/8 0.625 15.88
60 0.04 1.02 22 0.157 3.99 O 0.316 8.03 41/64 0.6406 16.27
59 0.041 1.04 21 0.159 4.04 P 0.323 8.20 21/32 0.6562 16.67
58 0.042 1.07 20 0.161 4.09 21/64 0.3281 8.33 43/64 0.6719 17.07
57 0.043 1.09 19 0.166 4.22 Q 0.332 8.43 11/16 0.6875 17.46
56 0.0465 1.18 18 0.1695 4.31 R 0.339 8.61 45/64 0.7031 17.86
3/64 0.0469 1.19 11/64 0.1719 4.37 11/32 0.3438 8.73 23/32 0.7188 18.26
55 0.052 1.32 17 0.173 4.39 S 0.348 8.84 47/64 0.7344 18.65
54 0.055 1.40 16 0.177 4.50 T 0.358 9.09 3/4 0.75 19.05
53 0.0595 1.51 15 0.18 4.57 23/64 0.3594 9.13 49/64 0.7656 19.45
1/16 0.0625 1.59 14 0.182 4.62 U 0.368 9.35 25/32 0.7812 19.84
Drill Decimal Metric Drill Decimal Metric Drill Decimal Metric
52 0.0635 1.61 13 0.185 4.70 51/64 0.7969 20.24
51 0.067 1.70 3/16 0.1875 4.76 13/16 0.8125 20.64
50 0.07 1.78 12 0.189 4.80 53/64 0.8281 21.03
49 0.073 1.85 11 0.191 4.85 27/32 0.8438 21.43
48 0.076 1.93 10 0.1935 4.91 55/64 0.8594 21.83
5/64 0.0781 1.98 9 0.196 4.98 7/8 0.875 22.23
47 0.0785 1.99 8 0.199 5.05 57/64 0.8906 22.62
46 0.081 2.06 7 0.201 5.11 29/32 0.9062 23.02
45 0.082 2.08 13/64 0.2031 5.16 59/64 0.9219 23.42
44 0.086 2.18 6 0.204 5.18 15/16 0.9375 23.81
43 0.089 2.26 5 0.2055 5.22 61/64 0.9531 24.21
42 0.0935 2.37 4 0.209 5.31 31/32 0.9688 24.61
3/32 0.0938 2.38 3 0.213 5.41 63/64 0.9844 25.00
41 0.096 2.44 7/32 0.2188 5.56 1 1 25.40

Switch to our mobile site