Drill Bit Decimal Size Equivalents
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About Drill Bits
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About Masonry Drill Bits
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Hex-Shank Masonry Core Drill Bits for Rotary-Only Drilling
These hollow bits cut with their outside edge for drilling large holes. Instead of using a hammering action to break up masonry material, these bits drill with rotary action only, requiring more pressure to grind up material. Use with handheld power drills, drill presses, and in hammer drills set to rotary-only mode. Do not use in hammering applications. To achieve maximum drilling depth, break up and remove the core every 4” before drilling deeper.
Pilot drills (sold separately) make starting holes easier.
For technical drawings and 3-D models, click on a part number.
Drill Bits | |||||||||||||||
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Shank | Length Extensions | Pilot Drills | |||||||||||||
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Specifications Met | For Use On | Each | Shank Size | Overall Lg. | Each | Each | |||
Inch | |||||||||||||||
Uncoated Carbide-Tipped Steel | |||||||||||||||
| 1" | 1" | 9" | 7" | Hex | 1/2" | ANSI B212.15 | Masonry, Concrete | 0000000 | 0000000 | 1/2" | 18" | 0000000 | 000000 | 000000 | 00 |
| 1" | 1" | 12" | 10" | Hex | 1/2" | ANSI B212.15 | Masonry, Concrete | 0000000 | 000000 | 1/2" | 18" | 0000000 | 00000 | 000000 | 00 |
| 1 1/4" | 1.25" | 12" | 10" | Hex | 1/2" | ANSI B212.15 | Masonry, Concrete | 0000000 | 000000 | 1/2" | 18" | 0000000 | 00000 | 000000 | 00 |
| 1 1/2" | 1.5" | 12" | 10" | Hex | 1/2" | ANSI B212.15 | Masonry, Concrete | 0000000 | 000000 | 1/2" | 18" | 0000000 | 00000 | 000000 | 00 |
| 1 3/4" | 1.75" | 12" | 10" | Hex | 1/2" | ANSI B212.15 | Masonry, Concrete | 0000000 | 000000 | 1/2" | 18" | 0000000 | 00000 | 0000000 | 000000 |
| 2" | 2" | 12" | 10" | Hex | 1/2" | ANSI B212.15 | Masonry, Concrete | 0000000 | 000000 | 1/2" | 18" | 0000000 | 00000 | 0000000 | 00000 |
| 2 1/2" | 2.5" | 12" | 10" | Hex | 1/2" | ANSI B212.15 | Masonry, Concrete | 0000000 | 000000 | 3/4" | 18" | 0000000 | 00000 | 0000000 | 00000 |
| 3" | 3" | 12" | 10" | Hex | 1/2" | ANSI B212.15 | Masonry, Concrete | 0000000 | 000000 | 3/4" | 18" | 0000000 | 00000 | 0000000 | 00000 |