Page 50 - Michigan Drill

Cobalt Screw Machine Length Drills

List No. 600C – Heavy Duty, 135° Split Point
The short flute length and overall length provides
maximum rigidity drilling in stainless steels and
HOLE MAKING Size Equivalent Length Overall Pkg. Price Size Equivalent Length Overall Pkg. Price
other tough alloys, castings and forgings.
Fractional Sizes

Decimal
Decimal
Flute
Flute
Length
Qty.
Each
Each
Qty.
Length
3/64
1/16
9/16
58.03
1-5/8
12
2.21
5/8
1-5/16
.5625
.0625
11/16
68.91
.0781
.5781
37/64
1-3/8
1-11/16
12
5/64 .0469 1/2 1-3/8 12 3.38 35/64 .5469 1-1/4 4 4 4-1/8 1 1 1 50.58
2.21
3/32 .0938 3/4 1-3/4 12 2.25 19/32 .5938 1-7/16 4-1/8 1 66.46
7/64 .1094 13/16 1-13/16 12 2.48 39/64 .6094 1-1/2 4-1/4 1 69.62
1/8 .1250 7/8 1-7/8 12 2.66 5/8 .6250 1-9/16 4-1/4 1 67.16
9/64 .1406 15/16 1-15/16 12 2.88 41/64 .6406 1-5/8 4-1/2 1 79.97
5/32 .1562 1 2-1/16 12 3.11 21/32 .6562 1-11/16 4-1/2 1 77.10
11/64 .1719 1-1/16 2-1/8 12 3.42 43/64 .6719 1-11/16 4-5/8 1 88.57
3/16 .1875 1-1/8 2-3/16 12 4.05 11/16 .6875 1-3/4 4-5/8 1 85.41
13/64 .2031 1-3/16 2-1/4 12 4.46 45/64 .7031 3 4-3/4 1 96.17
7/32 .2188 1-1/4 2-3/8 12 4.68 23/32 .7188 3 4-3/4 1 92.73
15/64 .2344 1-5/16 2-7/16 12 5.13 47/64 .7344 3-1/8 5 1 101.50
1/4 .2500 1-3/8 2-1/2 12 5.49 3/4 .7500 3-1/8 5 1 97.88
17/64 .2656 1-7/16 2-5/8 12 6.21 49/64 .7656 3-1/4 5-1/8 1 108.11
9/32 .2812 1-1/2 2-11/16 6 6.75 25/32 .7812 3-1/4 5-1/8 1 108.11
19/64 .2969 1-9/16 2-3/4 6 7.92 51/64 .7969 3-3/8 5-1/4 1 114.66
5/16 .3125 1-5/8 2-13/16 6 8.32 13/16 .8125 3-3/8 5-1/4 1 114.66
21/64 .3281 1-11/16 2-15/16 6 9.60 53/64 .8281 3-1/2 5-3/8 1 122.85
11/32 .3438 1-11/16 3 6 9.99 27/32 .8438 3-1/2 5-3/8 1 122.85
23/64 .3594 1-3/4 3-1/16 6 11.57 55/64 .8594 3-1/2 5-1/2 1 125.63
3/8 .3750 1/2 3-1/8 6 11.57 7/8 .8750 3-1/2 5-1/2 1 125.63
25/64 .3906 5/8 3-1/4 6 12.92 57/64 .8906 3-5/8 5-5/8 1 130.64
13/32 .4062 11/16 3-5/16 6 13.46 29/32 .9062 3-5/8 5-5/8 1 130.64
27/64 .4219 3/4 3-3/8 6 15.27 59/64 .9219 3-3/4 5-3/4 1 143.98
7/16 .4375 13/16 3-7/16 6 15.49 15/16 .9375 3-3/4 5-3/4 1 143.98
29/64 .4531 7/8 3-9/16 6 18.36 61/64 .9531 3-7/8 5-7/8 1 156.43
15/32 .4688 15/16 3-5/8 6 18.36 31/32 .9688 3-7/8 5-7/8 1 156.43
31/64 .4844 1 3-11/16 6 18.92 63/64 .9844 4 6 1 163.64
1/2 .5000 1-1/16 3-3/4 6 19.26 1 1.0000 4 6 1 163.64
33/64 .5156 1-1/8 3-7/8 1 49.32 1-5/16 1.3125 4-3/8 7 1 295.00
17/32 .5312 1-3/16 3-7/8 1 49.32 1-3/8 1.3750 4-1/2 7-1/8 1 312.50
Sizes with decimal equivalent smaller than .0625 are not split point. 3/4" and larger are furnished with notched point.
Letter Sizes
Decimal
Flute
Flute
Decimal
Size Equivalent Length Overall Pkg. Price Size Equivalent Length Overall Pkg. Price
Qty.
Each
Length
Qty.
Length
Each
A .2340 1-5/16 2-7/16 12 6.21 N .3020 1-5/8 2-13/16 6 9.45
B .2380 1-3/8 2-1/2 12 6.47 O .3160 1-11/16 2-15/16 6 10.35
C .2420 1-3/8 2-1/2 12 6.47 P .3230 1-11/16 2-15/16 6 10.35
D .2460 1-3/8 2-1/2 12 6.47 Q .3320 1-11/16 3 6 11.25
E .2500 1-3/8 2-1/2 12 5.49 R .3390 1-11/16 3 6 11.25
F .2570 1-7/16 2-5/8 12 6.84 S .3480 1-3/4 3-1/16 6 13.77
G .2610 1-7/16 2-5/8 12 6.84 T .3580 1-3/4 3-1/16 6 13.77
H .2660 1-1/2 2-11/16 12 7.34 U .3680 1-13/16 3-1/8 6 13.77
I .2720 1-1/2 2-11/16 6 7.34 V .3770 1-7/8 3-1/4 6 15.26
J .2770 1-1/2 2-11/16 6 7.34 W .3860 1-7/8 3-1/4 6 15.71
K .2810 1-1/2 2-11/16 6 7.47 X .3970 1-15/16 3-5/16 6 16.11
L .2900 1-9/16 2-3/4 6 8.55 Y .4040 1-15/16 3-5/16 6 16.11
M .2950 1-9/16 2-3/4 6 8.55 Z .4130 2 3-3/8 6 17.96
Sets
Sizes Pieces Set No. Price
1/16 – 1/4 x 64 ths 13 607CG 44.10
1/16 – 1/2 x 64 ths 29 607CF 268.76
A – Z 26 607CL 256.50
1 – 60 60 607CW 216.77
ths
1/16 – 1/2 x 64 , A – Z, 1 – 60 115 607CX 666.90
All sets are supplied in Huot metal index
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