Page 20 - Michigan Drill

Cobalt Aircraft Type "D" Drills

Jobber Length – Short Flute
List No. 319C – 135° Split Point NAS 965
Designed for handling the higher thrust loads when drilling tough high tensile
HOLE MAKING Fractional Sizes
and heat resistant alloy steels like stainless steels, titanium, and inconel. Due
to its heavy web 135º split point, short flute and jobber length
construction, it provides for a more rigid tool, eliminating vibration, and flexing.

Flute
Decimal
Overall
Flute
Decimal
Size
Size
Each
Each
Length
3/4
1-3/4
2.80
4
.0469
.2500
7.44
3/64 Equivalent Length Length Price 1/4 Equivalent Length Overall Price
1-3/8
1/16 .0625 5/8 1-7/8 2.80 9/32 .2812 1-1/2 4-1/4 9.40
5/64 .0781 11/16 2 2.91 19/64 .2969 1-9/16 4-3/8 10.76
3/32 .0938 3/4 2-1/4 2.95 5/16 .3125 1-5/8 4-1/2 12.09
7/64 .1094 13/16 2-5/8 3.23 11/32 .3438 1-11/32 4-3/4 14.03
1/8 .1250 7/8 2-3/4 3.66 21/64 .3281 1-11/16 4-5/8 14.80
5/32 .1562 1 3-1/8 4.64 3/8 .3750 1-13/16 5 16.95
11/64 .1719 1-1/16 3-1/4 4.78 7/16 .4375 2-1/16 5-1/2 23.54
3/16 .1875 1-1/8 3-1/2 5.07 15/32 .4688 2-1/8 5-3/4 28.72
7/32 .2188 1-1/4 3-3/4 6.69 31/64 .4844 2-3/16 5-7/8 31.31
15/64 .2344 2-5/8 3-7/8 7.10 1/2 .5000 2-1/4 6 28.83
Letter Sizes
Decimal
Decimal
Flute
Overall
Flute
Size Equivalent Length Length Price Size Equivalent Length Overall Price
Each
Length
Each
A .2340 1-5/16 3-7/8 8.49 L .2900 1-9/16 4-1/4 12.51
D .2460 1-3/8 4 9.20 O .3160 1-11/16 4-1/2 13.99
F .2570 1-7/16 4-1/8 9.70 P .3230 1-11/16 4-5/8 14.80
G .2610 1-7/16 4-1/8 10.40 V .3770 1-7/8 5 21.82
J .2770 1-1/2 4-1/8 11.02 X .3970 1-15/16 5-1/8 21.82
Wire Gauge Sizes
Decimal Flute Overall Price Decimal Flute Overall Price
Size Size
Equivalent Length Length Each Equivalent Length Length Each
1 .2280 1-5/16 3-7/8 8.42 24 .1520 1 3-1/8 4.53
2 .2210 1-5/16 3-7/8 8.42 27 .1440 1 3 4.10
3 .2130 1-1/4 3-3/4 7.66 30 .1285 15/16 2-3/4 3.45
5 .2055 1-1/4 3-3/4 7.66 31 .1200 7/8 2-3/4 3.45
8 .1990 1-3/16 3-5/8 5.93 35 .1100 7/8 2-5/8 3.23
9 .1960 1-3/16 3-5/8 5.93 39 .0995 13/16 2-3/8 3.02
10 .1935 1-3/16 3-5/8 5.93 40 .0980 13/16 2-3/8 2.80
11 .1910 1-3/16 3-1/2 5.93 43 .0890 3/4 2-1/4 3.12
13 .1850 1-1/8 3-1/2 5.72 46 .0810 3/4 2-1/8 3.12
17 .1730 1-1/8 3-3/8 5.04 47 .0785 3/4 2 3.12
18 .1695 1-1/16 3-1/4 4.56 48 .0760 11/16 2 3.12
20 .1610 1-1/16 3-1/4 4.53 49 .0730 11/16 2 3.12
21 .1590 1-1/16 3-1/4 4.53 50 .0700 11/16 2 2.91
23 .1540 1 3-1/8 4.53 55 .0520 5/8 1-7/8 2.91
Sizes with decimal equivalent smaller than .0625 are not split point.
Aircraft Routers
Straight Aircraft Router Tapered Aircraft Router
List No. 606 – Left Hand Helix, Right Hand Cut List No. 608 – Right Hand Helix, Right Hand Cut
Used for cutting, trimming and routing around openings in Used for profiling and routing in aluminum, hard rubber,
fuselage, windows, door sills, and plexi-glass. Capable of and plastic. High rake design for better cutting performance.
cutting without the need for drilling first. Fast chip ejection Small Large Length Overall Price
and high stock removal. Size End End of Cut Length Each
1 .0810 .0980 13/16 2" 3.00
Size Length of Cut Overall Length Price Each
2 .1100 .1280 7/8 2-1/4 3.00
1/4 9/16 2-3/8 2.70 3 .1650 .1875 1-1/16 2-1/2 3.50
5/16 9/16 2-3/8 5.75 4 .2240 .2500 1-1/4 3-3/4 5.00
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