Page 151 - Michigan Drill

Interchangeable

Pilot Counterbores

High Speed Steel

Carbide Tipped  Continued
List No. CT500 – Straight Shank
List No. CT501 – Taper Shank Price Each Price Each COUNTERBORES
Minimum Pilot Shank No. of Overall Straight Shank Morse Taper Shank
Size
Cut Hole Diameter Flutes Length CT500 Taper No. CT501
1-3/16 .3530 5/16 1 3 6-3/8 179.51 3 186.29
1-1/4 .4260 3/8 1 4 6-5/8 199.61 4 207.11
1-5/16 .4260 3/8 1 4 6-5/8 213.96 4 222.02
1-3/8 .4260 3/8 1 4 6-5/8 224.17 4 232.63
1-7/16 .4260 3/8 1-1/4 4 7-7/8 249.37 4 258.78
1-1/2 .4260 3/8 1-1/4 4 7-7/8 276.49 4 286.94
1-9/16 .4890 7/16 1-1/4 4 8-1/8 283.59 4 294.35
1-5/8 .4890 7/16 1-1/4 4 8-1/8 288.69 4 299.62
1-11/16 .4890 7/16 1-1/4 4 8-1/8 345.39 4 358.47
1-3/4 .4890 7/16 1-1/4 4 8-1/8 345.39 4 358.47
1-13/16 .4890 7/16 1-1/2 4 8-1/8 408.79 4 424.27
1-7/8 .4890 7/16 1-1/2 4 8-1/8 408.79 3 424.27
1-7/8 .4890 7/16 1-1/2 4 8-1/8 — 4 424.27
1-15/16 .4890 7/16 1-1/2 4 8-1/8 446.68 4 463.50
2 .5000 1/2 1-1/2 4 8-1/8 446.68 4 463.50

Interchangeable Counterbore Pilots
List No. 512
Pilots of different diameters can be used with each
counterbore. The shank diameter ordered must be the
same as the pilot hole size in the counterbore to be used.
Sizes Shank Diameters Available Price Sizes Shank Diameters Available Price
3/32 3/32 7.02 31/32 3/16, 5/16, 3/8, 7/16, 1/2 25.65
#40 3/32 7.02 1 3/16,1/4, 5/16, 3/8, 7/16, 1/2 25.65
1/8 3/32, 1/8 7.02 1-1/16 5/16, 3/8, 7/16, 1/2 26.10
9/64 3/32, 5/32 7.02 1-3/32 5/16 26.10
5/32 3/32, 1/8, 5/32 7.02 1-1/8 3/16, 5/16, 3/8, 7/16, 1/2 31.50
#21 5/32 7.20 1-3/16 1/4, 5/16, 3/8, 7/16, 1/2 32.40
#20 1/8 7.20 1-1/4 3/8, 7/16, 1/2 34.20
#19 1/8 7.20 1-5/16 5/16, 3/8, 7/16, 1/2 36.00
3/16 3/32, 1/8, 5/32, 3/16 7.20 1-3/8 5/16, 3/8, 7/16, 1/2 37.80
7/32 3/32, 1/8, 5/32, 3/16 8.10 1-7/16 3/8, 7/16, 1/2 39.60
1/4 3/32, 1/8, 5/32, 3/16, 1/4, 3/8 8.10 1-15/32 3/8 41.40
F 3/32, 3/16 8.64 1-1/2 3/8, 7/16, 1/2 41.40
17/64 1/8 8.64 1-9/16 7/16, 1/2 43.20
9/32 3/32, 1/8, 5/32, 3/16,1/4 8.64 1-5/8 7/16, 1/2 44.10
5/16 3/32, 1/8, 5/32, 3/16,1/4, 5/16 8.64 1-11/16 7/16, 1/2 49.50
11/32 3/32, 1/8, 5/32, 3/16,1/4, 5/16 8.64 1-3/4 7/16, 1/2 54.00
3/8 3/32, 1/8, 5/32, 3/16,1/4, 5/16, 3/8 9.54 1-13/16 7/16, 1/2 59.40
13/32 3/32, 1/8, 5/32, 3/16,1/4, 5/16, 3/8 9.54 1-7/8 7/16, 1/2 67.50
7/16 3/32, 1/8, 5/32, 3/16,1/4, 5/16, 3/8 9.72 1-15/16 1/2 70.20
15/32 1/8, 5/32, 3/16,1/4, 5/16, 3/8, 7/16 10.26 2 1/2 73.80
1/2 3/32, 1/8, 5/32, 3/16,1/4, 5/16, 3/8, 7/16 11.16 2-1/16 1/2 99.00
17/32 1/8, 5/32, 3/16,1/4, 5/16, 3/8, 7/16, 1/2 12.96 2-1/8 1/2 100.80
35/64 1/4, 5/16 15.30 2-3/16 1/2 106.20
9/16 1/8, 3/16,1/4, 5/16, 3/8, 7/16, 1/2 14.58 2-1/4 1/2 112.50
19/32 1/8, 3/16,1/4, 5/16, 3/8, 7/16, 1/2 15.30 2-5/16 1/2 144.00
5/8 1/8, 3/16,1/4, 5/16, 3/8, 7/16, 1/2 16.02 2-3/8 1/2 151.20
21/32 3/16,1/4, 5/16, 3/8, 7/16, 1/2 16.20 2-7/16 1/2 157.50
11/16 3/16,1/4, 5/16, 3/8, 7/16, 1/2 16.38 2-1/2 1/2 162.00
23/32 3/16,1/4, 5/16, 3/8, 7/16, 1/2 18.54 2-9/16 1/2 175.50
3/4 3/32, 3/16,1/4, 5/16, 3/8, 7/16, 1/2 18.54 2-5/8 1/2 189.00
25/32 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 19.80 2-11/16 1/2 193.50
13/16 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 20.88 2-3/4 1/2 202.50
27/32 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 21.60 2-13/16 1/2 211.50
7/8 3/16,1/4, 5/16, 3/8, 7/16, 1/2 23.04 2-7/8 1/2 220.50
29/32 1/4, 5/16, 3/8, 7/16, 1/2 23.40 2-15/16 1/2 234.00
15/16 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 24.30 3 1/2 247.50
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