Page 52 - Michigan Drill

Metric Cobalt

Screw Machine Length Drills

HOLE MAKING Size Equivalent Length Overall Pkg. Price Size Equivalent Length Overall Pkg. Price
List No. 600MC – Heavy Duty, 135° Split Point
The short flute length and overall length provides
maximum rigidity drilling in Stainless Steels and
other tough alloys, castings and forgings.
Decimal
Flute
Decimal
Flute
Each
Each
Qty.
Length
Length
Qty.
1.00
1.40 .0394 1/2 1-3/8 12 4.55 6.50 .2559 1-7/32 2-3/4 12 7.90
.0551
1/2
2-29/32
1-11/32
8.71
12
.2677
12
1-3/8
6.80
4.55
1.50 .0591 1/2 1-3/8 12 4.55 7.00 .2756 1-11/32 2-29/32 12 8.71
1.70 .0669 7/16 1-3/8 12 4.55 7.10 .2795 1-11/32 2-29/32 12 9.93
1.75 .0589 7/16 1-7/16 12 4.55 7.40 .2913 1-11/32 2-29/32 12 10.94
2.00 .0787 15/32 1-1/2 12 4.55 7.50 .2953 1-11/32 2-29/32 6 10.94
2.05 .0807 15/32 1-1/2 12 4.55 7.60 .2992 1-15/32 3-1/8 6 12.15
2.50 .0984 1/2 1-9/16 12 4.66 7.90 .3110 1-15/32 3-1/8 6 12.15
2.70 .1063 5/8 1-13/16 12 4.76 8.00 .3150 1-15/32 3-1/8 6 12.15
2.80 .1102 5/8 1-13/16 12 4.76 8.10 .3189 1-15/32 3-1/8 6 13.17
3.00 .1181 5/8 1-13/16 12 4.76 8.20 .3228 1-15/32 3-1/8 6 13.17
3.20 .1260 23/32 1-13/16 12 4.76 8.40 .3307 1-15/32 3-1/8 6 13.17
3.40 .1339 25/32 2-1/16 12 4.76 8.50 .3346 1-15/32 3-1/8 6 13.17
3.50 .1378 25/32 2-1/16 12 4.76 8.60 .3386 1-15/32 3-1/8 6 14.62
3.80 .1496 7/8 2-5/32 12 4.76 8.70 .3425 1-9/16 3-5/16 6 16.61
4.00 .1575 7/8 2-5/32 12 4.76 8.80 .3465 1-9/16 3-5/16 6 16.61
4.10 .1614 7/8 2-5/32 12 5.47 9.00 .3543 1-9/16 3-5/16 6 19.24
4.20 .1654 7/8 2-5/32 12 5.47 9.10 .3583 1-9/16 3-5/16 6 19.24
4.30 .1693 15/16 2-9/32 12 5.47 9.90 .3898 1-11/16 3-1/2 6 19.44
4.40 .1732 15/16 2-9/32 12 5.57 10.00 .3937 1-11/16 3-1/2 6 19.44
4.50 .1772 15/16 2-9/32 12 5.57 10.50 .4134 1-11/16 3-1/2 6 21.14
5.00 .1969 1-1/32 2-7/16 12 6.08 11.50 .4528 1-7/8 3-3/4 6 25.52
5.40 .2126 1-3/32 2-19/32 12 7.39 11.80 .4646 1-7/8 3-3/4 6 27.34
5.50 .2165 1-3/32 2-19/32 12 7.60 12.20 .4803 2-1/64 4-1/64 6 28.04
5.80 .2283 1-3/32 2-19/32 12 7.60 12.50 .4921 2-1/64 4-1/64 6 28.04
6.00 .2362 1-3/32 2-19/32 12 7.60 14.00 .5512 2-1/2 4 6 69.00
Sizes with decimal equivalent smaller than .0625 are not split point.
Parabolic Flute
Screw Machine Drills
High Speed Steel & Titanium Nitride Coated
List No. 600PF – H.S. 135° Split Point
List No. 600PFT – TiN Coated 135° Split Point
Parabolic drills are for hole drilling at higher feed rates in
aluminum alloys and other low to medium tensile strength materials.
Fractional Sizes
Price Each Price Each
Dec.
Flute
Dec.
Flute
Size Equiv. Length Overall Pkg. H.S. TiN Coated Size Equiv. Length Overall Pkg. H.S. TiN Coated
Length
600PFT
Qty. 600PF
Qty. 600PF
Length
600PFT
1/16 .0625 5/8 1-5/8 12 3.42 4.70 19/64 .2969 1-9/16 2-3/4 6 10.73 15.29
5/64 .0781 11/16 1-11/16 12 3.10 4.38 5/16 .3125 1-5/8 2-13/16 6 10.73 15.29
3/32 .0938 3/4 1-3/4 12 3.42 4.70 21/64 .3281 1-11/16 2-15/16 6 11.78 16.34
7/64 .1094 13/16 1-13/16 12 3.42 4.70 11/32 .3438 1-11/16 3 6 11.78 16.34
1/8 .1250 7/8 1-7/8 12 3.74 5.02 23/64 .3594 1-3/4 3-1/16 6 14.82 19.42
9/64 .1406 15/16 1-15/16 12 4.10 5.38 3/8 .3750 1-13/16 3-1/8 6 12.46 17.06
5/32 .1562 1 2-1/16 12 4.10 5.38 25/64 .3906 1-7/8 3-1/4 6 16.67 24.95
11/64 .1719 1-1/16 2-1/8 12 5.31 6.59 13/32 .4062 1-15/16 3-5/16 6 19.30 27.58
3/16 .1875 1-1/8 2-3/16 12 5.05 6.33 27/64 .4219 2 3-3/8 6 23.45 31.73
13/64 .2031 1-3/16 2-1/4 12 5.58 8.14 7/16 .4375 2-1/16 3-7/16 6 23.45 31.73
7/32 .2188 1-1/4 2-3/8 12 6.53 9.09 29/64 .4531 2-1/8 3-9/16 6 24.61 32.89
15/64 .2344 1-5/16 2-7/16 12 6.79 9.35 15/32 .4688 2-1/8 3-5/8 6 23.45 31.73
1/4 .2500 1-3/8 2-1/2 12 7.69 10.25 31/64 .4844 2-3/16 3-11/16 6 23.45 31.73
17/64 .2656 1-7/16 2-5/8 12 8.32 12.88 1/2 .5000 2-1/4 3-3/4 6 25.56 33.84
9/32 .2812 1-1/2 2-11/16 6 9.52 14.08 23/32 .3594 2-1/4 3-3/4 1 79.00 102.00
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