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About Drill Bits
Compare material, finish, length class, and decimal size equivalents.
Carbide-Insert Drill Bits
Built-in-Pilot Counterbores
Carbide-Tipped Steel
Pilot | Shank | Uncoated | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | Body Dia. | Dia. | Lg. | Overall Lg. | Dia. | Type | No. of Flutes | Mfr. | Each | |||
| 7/8" | 1.322" | 7/8" | 0.875" | 8 1/8" | 7/8" | Round | 4 | Rock River Tool | 3218A181 | 0000000 | ||
Oversized Counterbores
High-Speed Steel%20--%3e%3csvg%20version='1.1'%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20viewBox='0%200%20400%20400'%20style='enable-background:new%200%200%20400%20400;'%20xml:space='preserve'%3e%3cstyle%20type='text/css'%3e%20.st0{fill:%231A70A0;}%20.st1{opacity:0.5;}%20%3c/style%3e%3cg%3e%3cg%3e%3cpath%20class='st0'%20d='M200,56.9c38.35,0,74.4,14.93,101.51,42.05c27.11,27.11,42.05,63.17,42.05,101.51s-14.93,74.4-42.05,101.51%20S238.35,344.02,200,344.02s-74.4-14.93-101.51-42.05c-27.11-27.11-42.05-63.17-42.05-101.51s14.93-74.4,42.05-101.51%20S161.65,56.9,200,56.9%20M200,12.9C96.41,12.9,12.44,96.88,12.44,200.46c0,103.59,83.97,187.56,187.56,187.56%20c103.59,0,187.56-83.97,187.56-187.56C387.56,96.88,303.59,12.9,200,12.9L200,12.9z'/%3e%3c/g%3e%3cg%3e%3cg%20class='st1'%3e%3cpath%20class='st0'%20d='M235.49,152.24h16.15l-27.46,111.87c-1.94,7.8-2.91,12.5-2.91,14.1c0,1.82,0.58,3.29,1.73,4.41%20c1.16,1.12,2.69,1.68,4.61,1.68c5.23,0,11.78-3.85,19.63-11.55l17.22,21.34c-16.95,17.33-34.87,26-53.78,26%20c-8.37,0-15.45-1.47-21.23-4.41c-5.79-2.94-10.44-7.25-13.95-12.92c-3.51-5.67-5.27-11.18-5.27-16.53c0-1.93,0.35-5.24,1.05-9.94%20c1-6.94,2.05-12.54,3.15-16.82l15.22-62.15h-32.69l7.65-30.97C190.89,163.58,214.53,158.88,235.49,152.24z%20M230.44,80.84%20c8.24,0,14.66,2.62,19.26,7.86c4.6,5.24,6.9,11.55,6.9,18.94c0,5.46-1.42,10.7-4.25,15.73c-2.83,5.03-6.88,9.07-12.12,12.12%20c-5.24,3.05-10.33,4.57-15.24,4.57c-4.6,0-9.17-1.23-13.72-3.69c-4.55-2.46-8.02-5.78-10.43-9.95%20c-2.41-4.17-3.61-8.67-3.61-13.48c0-5.35,1.52-10.64,4.57-15.89c3.05-5.24,7.03-9.25,11.96-12.04%20C218.68,82.23,224.24,80.84,230.44,80.84z'/%3e%3c/g%3e%3cg%3e%3cpath%20class='st0'%20d='M214.08,152.24h16.15l-27.46,111.87c-1.94,7.8-2.91,12.5-2.91,14.1c0,1.82,0.58,3.29,1.73,4.41%20c1.16,1.12,2.69,1.68,4.61,1.68c5.23,0,11.78-3.85,19.63-11.55l17.22,21.34c-16.95,17.33-34.87,26-53.78,26%20c-8.37,0-15.45-1.47-21.23-4.41c-5.79-2.94-10.44-7.25-13.95-12.92c-3.51-5.67-5.27-11.18-5.27-16.53c0-1.93,0.35-5.24,1.05-9.94%20c1-6.94,2.05-12.54,3.15-16.82l15.22-62.15h-32.69l7.65-30.97C169.48,163.58,193.11,158.88,214.08,152.24z%20M209.03,80.84%20c8.24,0,14.66,2.62,19.26,7.86c4.6,5.24,6.9,11.55,6.9,18.94c0,5.46-1.42,10.7-4.25,15.73c-2.83,5.03-6.88,9.07-12.12,12.12%20c-5.24,3.05-10.33,4.57-15.24,4.57c-4.6,0-9.17-1.23-13.72-3.69c-4.55-2.46-8.02-5.78-10.43-9.95%20c-2.41-4.17-3.61-8.67-3.61-13.48c0-5.35,1.52-10.64,4.57-15.89c3.05-5.24,7.03-9.25,11.96-12.04%20C197.26,82.23,202.83,80.84,209.03,80.84z'/%3e%3c/g%3e%3c/g%3e%3c/g%3e%3c/svg%3e)
Pilot | Shank | Uncoated | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | Body Dia. | Dia. | Lg. | Overall Lg. | Dia. | Type | No. of Flutes | Mfr. | Each | |||
1/64" Oversize | ||||||||||||
| 7/8" | 1.338" | 0.891" | 0.875" | 8 1/8" | 7/8" | Round | 4 | Alvord-Polk Tool | 2919A67 | 0000000 | ||
1/32" Oversize | ||||||||||||
| 7/8" | 1.353" | 0.906" | 0.875" | 8 1/8" | 7/8" | Round | 4 | Alvord-Polk Tool | 2919A87 | 000000 | ||
0.5 mm Oversize | ||||||||||||
| M20 | 30.5 mm | 20.5 mm | 0.750" | 8 1/8" | 7/8" | Round | 4 | Alvord-Polk Tool | 2740A26 | 000000 | ||
Reamers
Adjustable Size, Square Shank
Reamers | Replacement Blades | Optional Extension Pilots | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Reamer Dia. | Material | Square Shank Size | Overall Lg. | No. of Blades | For Use On | Mfr. | Each | Pkg. Qty. | Pkg. | Each | |||||
Straight Blade | |||||||||||||||
Inch | |||||||||||||||
| 0.8438" to 0.9375" (27/32" to 15/16") | High-Speed Steel | 0.4370" | 8 1/8" | 6 | Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Stainless Steel, Steel, Titanium, Tool Steel, Hardened Steel | Chadwick & Trefethen | 3141A18 | 0000000 | 6 | 3141A47 | 0000000 | 3004A19 | 000000 | ||
Angled Blade | |||||||||||||||
Inch | |||||||||||||||
| 0.8438" to 0.9375" (27/32" to 15/16") | Tool Steel | 0.4370" | 8 1/8" | 6 | Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium | Chadwick & Trefethen | 2987A17 | 000000 | 6 | 2987A57 | 00000 | 3004A19 | 00000 | ||
| 0.8750" to 1.0000" (7/8" to 1") | Tool Steel | 0.4370" | 8 1/8" | 6 | Aluminum, Brass, Bronze, Fiberglass, Iron, Plastic, Steel, Titanium | Chadwick & Trefethen | 2987A36 | 000000 | 6 | 2987A76 | 00000 | 3004A19 | 00000 | ||





























