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About Drill Bits
Compare material, finish, length class, and decimal size equivalents.
About Masonry Drill Bits
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Tapered-Round-Shank Masonry Drill Bits for Rotary Hammers
Also known as A-taper bits, these fit rotary hammers with a taper-shank chuck. Drill holes using simultaneous rotary and hammering action to break masonry material into tiny granules. This type of bit drills faster and penetrates material with less pressure than rotary-only bits. Also called percussion or impact bits.
For technical drawings and 3-D models, click on a part number.
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Shank Type | Point Style | Specifications Met | For Use On | Each | |
Inch | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Uncoated Carbide-Tipped Steel | |||||||||
1/4" | 0.25" | 6" | 4" | Tapered Round | Standard | ANSI B212.15 | Masonry, Concrete | 0000000 | 000000 |
| 5/16" | 0.3125" | 6" | 4" | Tapered Round | Standard | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 3/8" | 0.375" | 6" | 4" | Tapered Round | Standard | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 3/8" | 0.375" | 9" | 7" | Tapered Round | Standard | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 3/8" | 0.375" | 12" | 10" | Tapered Round | Standard | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 1/2" | 0.5" | 6" | 4" | Tapered Round | Standard | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |
| 1/2" | 0.5" | 12" | 10" | Tapered Round | Standard | ANSI B212.15 | Masonry, Concrete | 0000000 | 00000 |