COUNTERBORES 149 Carbide Tipped List No. CT500 – Straight Shank List No. CT501 – Taper Shank Price Each Price Each Size Minimum Cut Pilot Hole Shank Diameter No. of Flutes Overall Length Straight Shank CT500 Morse Taper No. Taper Shank 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 Continued High Speed Steel Interchangeable Pilot Counterbores 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 3/32 3/32 7.02 #40 3/32 7.02 1/8 3/32, 1/8 7.02 9/64 3/32, 5/32 7.02 5/32 3/32, 1/8, 5/32 7.02 #21 5/32 7.20 #20 1/8 7.20 #19 1/8 7.20 3/16 3/32, 1/8, 5/32, 3/16 7.20 7/32 3/32, 1/8, 5/32, 3/16 8.10 1/4 3/32, 1/8, 5/32, 3/16, 1/4, 3/8 8.10 F 3/32, 3/16 8.64 17/64 1/8 8.64 9/32 3/32, 1/8, 5/32, 3/16,1/4 8.64 5/16 3/32, 1/8, 5/32, 3/16,1/4, 5/16 8.64 11/32 3/32, 1/8, 5/32, 3/16,1/4, 5/16 8.64 3/8 3/32, 1/8, 5/32, 3/16,1/4, 5/16, 3/8 9.54 13/32 3/32, 1/8, 5/32, 3/16,1/4, 5/16, 3/8 9.54 7/16 3/32, 1/8, 5/32, 3/16,1/4, 5/16, 3/8 9.72 15/32 1/8, 5/32, 3/16,1/4, 5/16, 3/8, 7/16 10.26 1/2 3/32, 1/8, 5/32, 3/16,1/4, 5/16, 3/8, 7/16 11.16 17/32 1/8, 5/32, 3/16,1/4, 5/16, 3/8, 7/16, 1/2 12.96 35/64 1/4, 5/16 15.30 9/16 1/8, 3/16,1/4, 5/16, 3/8, 7/16, 1/2 14.58 19/32 1/8, 3/16,1/4, 5/16, 3/8, 7/16, 1/2 15.30 5/8 1/8, 3/16,1/4, 5/16, 3/8, 7/16, 1/2 16.02 21/32 3/16,1/4, 5/16, 3/8, 7/16, 1/2 16.20 11/16 3/16,1/4, 5/16, 3/8, 7/16, 1/2 16.38 23/32 3/16,1/4, 5/16, 3/8, 7/16, 1/2 18.54 3/4 3/32, 3/16,1/4, 5/16, 3/8, 7/16, 1/2 18.54 25/32 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 19.80 13/16 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 20.88 27/32 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 21.60 7/8 3/16,1/4, 5/16, 3/8, 7/16, 1/2 23.04 29/32 1/4, 5/16, 3/8, 7/16, 1/2 23.40 15/16 3/16, 1/4, 5/16, 3/8, 7/16, 1/2 24.30 Sizes Shank Diameters Available Price 31/32 3/16, 5/16, 3/8, 7/16, 1/2 25.65 1 3/16,1/4, 5/16, 3/8, 7/16, 1/2 25.65 1-1/16 5/16, 3/8, 7/16, 1/2 26.10 1-3/32 5/16 26.10 1-1/8 3/16, 5/16, 3/8, 7/16, 1/2 31.50 1-3/16 1/4, 5/16, 3/8, 7/16, 1/2 32.40 1-1/4 3/8, 7/16, 1/2 34.20 1-5/16 5/16, 3/8, 7/16, 1/2 36.00 1-3/8 5/16, 3/8, 7/16, 1/2 37.80 1-7/16 3/8, 7/16, 1/2 39.60 1-15/32 3/8 41.40 1-1/2 3/8, 7/16, 1/2 41.40 1-9/16 7/16, 1/2 43.20 1-5/8 7/16, 1/2 44.10 1-11/16 7/16, 1/2 49.50 1-3/4 7/16, 1/2 54.00 1-13/16 7/16, 1/2 59.40 1-7/8 7/16, 1/2 67.50 1-15/16 1/2 70.20 2 1/2 73.80 2-1/16 1/2 99.00 2-1/8 1/2 100.80 2-3/16 1/2 106.20 2-1/4 1/2 112.50 2-5/16 1/2 144.00 2-3/8 1/2 151.20 2-7/16 1/2 157.50 2-1/2 1/2 162.00 2-9/16 1/2 175.50 2-5/8 1/2 189.00 2-11/16 1/2 193.50 2-3/4 1/2 202.50 2-13/16 1/2 211.50 2-7/8 1/2 220.50 2-15/16 1/2 234.00 3 1/2 247.50
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