Michigan-Drill-Catalog

COUNTERBORES 147 Straight Shank 500 Taper Shank 501 Size Pilot Hole Size Range of Pilot Sizes Number of Flutes Overall Length Shank Diameter Price Each Morse Taper No. Price Each 1-1/8 5/16 5/16 - 1-3/8 3 6-3/8 1 73.26 3 79.55 1-5/32 5/16 5/16 - 1-3/8 3 6-3/8 1 85.95 3 85.95 1-3/16 5/16 5/16 - 1-3/8 3 6-3/8 1 79.38 3 81.65 1-7/32 5/16 5/16 - 1-3/8 3 6-3/8 1 99.00 3 96.30 1-1/4 3/8 1/4 - 1-7/16 5 6-5/8 1 92.12 3 96.30 1-9/32 3/8 1/4 - 1-7/16 5 6-5/8 1 98.00 — — 1-5/16 3/8 1/4 - 1-7/16 5 6-5/8 1 106.38 3 106.77 1-11/32 3/8 1/4 - 1-7/16 5 6-5/8 1 106.38 3 106.77 1-3/8 3/8 1/4 - 1-7/16 5 6-5/8 1 106.38 3 106.77 1-13/32 3/8 1/4 - 1-7/16 5 6-5/8 1 110.26 — — 1-7/16 3/8 1/4 - 1-7/16 5 7-7/8 1-1/4 110.26 4 113.85 1-15/32 3/8 1/4 - 1-7/16 5 7-7/8 1-1/4 119.26 — — 1-1/2 3/8 1/4 - 1-7/16 5 7-7/8 1-1/4 119.26 4 119.60 1-9/16 7/16 15/32 - 1-7/8 5 8-1/8 1-1/4 145.28 4 145.28 1-5/8 7/16 15/32 - 1-7/8 5 8-1/8 1-1/4 161.38 4 163.26 1-11/16 7/16 15/32 - 1-7/8 5 8-1/8 1-1/4 171.18 4 172.53 1-3/4 7/16 15/32 - 1-7/8 5 8-1/8 1-1/4 173.88 4 175.95 1-13/16 7/16 15/32 - 1-7/8 5 8-1/8 1-1/2 182.34 4 192.69 1-7/8 7/16 15/32 - 1-7/8 5 8-1/8 1-1/2 190.52 4 192.69 1-15/16 7/16 15/32 - 1-7/8 5 8-1/8 1-1/2 208.00 4 210.00 2 1/2 17/32 - 3 5 8-3/8 1-1/2 215.64 4 217.62 2-1/16 1/2 17/32 - 3 5 9-7/8 — — 5 272.16 2-1/8 1/2 17/32 - 3 5 9-7/8 1-1/2 272.16 5 272.16 2-3/16 1/2 17/32 - 3 5 9-7/8 — — 5 288.90 2-1/4 1/2 17/32 - 3 5 9-7/8 1-1/2 284.40 5 288.90 2-5/16 1/2 17/32 - 3 5 9-7/8 1-1/2 — 5 314.10 2-3/8 1/2 17/32 - 3 5 9-7/8 1-1/2 304.20 5 314.10 2-7/16 1/2 17/32 - 3 5 9-7/8 — — 5 333.00 2-1/2 1/2 17/32 - 3 5 9-7/8 1-1/2 315.00 5 333.00 2-9/16 1/2 17/32 - 3 5 9-7/8 — — 5 413.10 2-5/8 1/2 17/32 - 3 5 9-7/8 1-3/4 396.90 5 436.50 2-3/4 1/2 17/32 - 3 5 9-7/8 1-3/4 469.00 5 487.80 2-7/8 1/2 17/32 - 3 5 9-7/8 1-3/4 488.00 5 532.80 3 1/2 17/32 - 3 5 9-7/8 1-3/4 505.00 5 532.80 Sets Description 13 Counterbores 26 Pilots Pcs. Set No. Price Straight Shank 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8,11/16, 3/4, 13/16, 7/8, 15/16, 1 1/8, 5/32, 3/16, 1/4 with 3/32 shank 3/16, 7/32, 1/4, 9/32, 5/16 with 5/32 shank 1/4, 5/16, 3/8, 7/16, 1/2 with 3/16 shank 5/16, 3/8, 7/16, 1/2, 9/16, 5/8 with 1/4 shank 3/8, 7/16, 1/2, 9/16, 5/8, 3/4 with 5/16 shank 39 500SA 825.03 Taper Shank 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8,11/16, 3/4, 13/16, 7/8, 15/16, 1 1/8, 5/32, 3/16, 1/4 with 3/32 shank 3/16, 7/32, 1/4, 9/32, 5/16 with 5/32 shank 1/4, 5/16, 3/8, 7/16, 1/2 with 3/16 shank 5/16, 3/8, 7/16, 1/2, 9/16, 5/8 with 1/4 shank 3/8, 7/16, 1/2, 9/16, 5/8, 3/4 with 5/16 shank 39 501S 855.20 Short Series List No. 500 – Straight Shank List No. 501 – Taper Shank Interchangeable Pilot Counterbores High Speed Steel Used to enlarge the openings of a hole to allow room for the head of a screw. Also for general purpose counterboring and spot facing. For use with interchangeable Pilots  Continued

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