Counterbores are used to enlarge a preformed hole when a flat bottom is required or to spotface when a machine finish is required. The counterbore is an end cutting tool which may utilize a pilot to align the enlarged hole being machined with the preformed hole. Capscrew counterbores have non-removable pilots.
| Decimal Diameter | Fractional Diameter | Number Of Flutes | Overall Length | Pilot Diameter | Pilot Diameter Mm | Pilot Length | Screw Size | Screw Size Mm | Shank Diameter | EDP | Price | Order | 1.5420 | 4 | 8 1/2 | 1.031 | 1 | 1 | 1 | 95150313 | $203.90 | 1.5100 | 4 | 8 1/2 | 1 | 1 | 1 | 1 | 95150000 | $203.90 | 1.5260 | 4 | 8 1/2 | 1.015 | 1 | 1 | 1 | 95150156 | $203.90 | 1.3380 | 4 | 8 1/8 | 0.891 | 7/8 | 7/8 | 7/8 | 95158910 | $178.15 | 1.3540 | 4 | 8 1/8 | 0.906 | 7/8 | 7/8 | 7/8 | 95159060 | $178.15 | 1.2008 | 3 | 8 | 20.5 | 3/4 | 20 | 7/8 | 9515205 | $170.90 | 1.3220 | 4 | 8 1/8 | 0.875 | 7/8 | 7/8 | 7/8 | 95158750 | $178.15 | 1.1490 | 3 | 7 3/4 | 0.765 | 3/4 | 3/4 | 3/4 | 95157650 | $160.15 | 1.1650 | 3 | 7 3/4 | 0.781 | 3/4 | 3/4 | 3/4 | 95157810 | $160.15 | 0.9770 | 3 | 7 5/8 | 0.656 | 5/8 | 5/8 | 5/8 | 95156560 | $162.50 | 1.1330 | 3 | 7 3/4 | 0.75 | 3/4 | 3/4 | 3/4 | 95157500 | $160.15 | 0.9610 | 3 | 7 5/8 | 0.64 | 5/8 | 5/8 | 5/8 | 95156400 | $162.50 | 0.9646 | 3 | 7 5/8 | 16.5 | 5/8 | 16 | 5/8 | 9515165 | $184.30 | 0.8830 | 3 | 7 5/8 | 0.593 | 9/16 | 9/16 | 5/8 | 95155930 | $142.55 | 0.9450 | 3 | 7 5/8 | 0.625 | 5/8 | 5/8 | 5/8 | 95156250 | $162.50 | 0.8510 | 3 | 7 5/8 | 0.563 | 9/16 | 9/16 | 5/8 | 95155625 | $142.55 | 0.8670 | 3 | 7 5/8 | 0.578 | 9/16 | 9/16 | 5/8 | 95155780 | $142.55 | 0.7890 | 3 | 7 1/2 | 0.531 | 1/2 | 1/2 | 1/2 | 95155310 | $147.55 | 0.8465 | 3 | 7 5/8 | 14.5 | 9/16 | 14 | 5/8 | 9515145 | $176.30 | 0.7570 | 3 | 7 1/2 | 0.5 | 1/2 | 1/2 | 1/2 | 95155000 | $147.55 | 0.7730 | 3 | 7 1/2 | 0.515 | 1/2 | 1/2 | 1/2 | 95155150 | $147.55 | 0.6950 | 3 | 7 | 0.468 | 1/2 | 7/16 | 1/2 | 95154680 | $130.05 | 0.7283 | 3 | 7 1/2 | 12.5 | 1/2 | 12 | 1/2 | 9515125 | $151.20 | 0.6630 | 3 | 7 | 0.438 | 1/2 | 7/16 | 1/2 | 95154375 | $130.05 | 0.6790 | 3 | 7 | 0.453 | 1/2 | 7/16 | 1/2 | 95154530 | $130.05 | 0.6040 | 3 | 6 1/2 | 0.406 | 1/2 | 3/8 | 1/2 | 95154060 | $134.60 | 0.6496 | 3 | 7 | 10.5 | 1/2 | 10 | 1/2 | 9515105 | $161.25 | 0.5720 | 3 | 6 1/2 | 0.375 | 1/2 | 3/8 | 1/2 | 95153750 | $134.60 | 0.5880 | 3 | 6 1/2 | 0.39 | 1/2 | 3/8 | 1/2 | 95153900 | $134.60 | 0.5070 | 3 | 6 1/8 | 0.343 | 3/8 | 5/16 | 3/8 | 95153430 | $119.45 | 0.5315 | 17/32 | 3 | 6 1/2 | 8.5 | 3/8 | 8 | 1/2 | 9515085 | $148.20 | 0.4750 | 3 | 6 1/8 | 0.313 | 3/8 | 5/16 | 3/8 | 95153125 | $119.45 | 0.4910 | 3 | 6 1/8 | 0.328 | 3/8 | 5/16 | 3/8 | 95153280 | $119.45 | 0.4134 | 3 | 5 5/8 | 6.5 | 5/16 | 6 | 5/16 | 9515065 | $124.85 | 0.4140 | 3 | 5 5/8 | 0.281 | 5/16 | 1/4 | 5/16 | 95152810 | $118.65 | 0.3820 | 3 | 5 5/8 | 0.25 | 5/16 | 1/4 | 5/16 | 95152500 | $106.70 | 0.3980 | 3 | 5 5/8 | 0.265 | 5/16 | 1/4 | 5/16 | 95152650 | $118.65 | 0.3543 | 3 | 5 5/8 | 5.5 | 9/32 | 5 | 5/16 | 9515055 | $118.20 |
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