Drill Bit Decimal Size Equivalents
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About Drill Bits
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Carbide-Tipped Drill Bits for Hardened Steel
The straight flutes and notched point withstand the heavy pressure necessary to penetrate hard steel. These carbide-tipped bits maintain their sharp edges when drilling abrasive material. Because they aren’t as brittle as solid carbide bits, they can be used in less rigid setups, such as a hand-held drill. They are jobbers' length and have the rigidity and length required for most hand-held drilling and machine tool applications.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Max. Hardness | Each | |
Inch | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
| 3/16" | 0.1875" | 3 1/2" | 0.75" | Round | 3/16" | Notched | Rockwell C60 | 0000000 | 000000 |
| 13/64" | 0.2031" | 3 3/4" | 0.81" | Round | 13/64" | Notched | Rockwell C60 | 0000000 | 00000 |
| 7/32" | 0.2188" | 3 3/4" | 0.87" | Round | 7/32" | Notched | Rockwell C60 | 0000000 | 00000 |
| 15/64" | 0.2344" | 4" | 0.93" | Round | 15/64" | Notched | Rockwell C60 | 0000000 | 00000 |
| 1/4" | 0.25" | 4" | 1" | Round | 1/4" | Notched | Rockwell C60 | 0000000 | 00000 |
| 17/64" | 0.2656" | 4 1/4" | 1.06" | Round | 17/64" | Notched | Rockwell C60 | 0000000 | 00000 |
| 9/32" | 0.2813" | 4 1/4" | 1.12" | Round | 9/32" | Notched | Rockwell C60 | 0000000 | 00000 |
| 19/64" | 0.2969" | 4 1/2" | 1.18" | Round | 19/64" | Notched | Rockwell C60 | 0000000 | 00000 |
| 5/16" | 0.3125" | 4 1/2" | 1.25" | Round | 5/16" | Notched | Rockwell C60 | 0000000 | 00000 |
| 21/64" | 0.3281" | 4 3/4" | 1.31" | Round | 21/64" | Notched | Rockwell C60 | 0000000 | 00000 |
| 11/32" | 0.3438" | 4 3/4" | 1.37" | Round | 11/32" | Notched | Rockwell C60 | 0000000 | 00000 |
| 23/64" | 0.3594" | 5" | 1.43" | Round | 23/64" | Notched | Rockwell C60 | 0000000 | 00000 |
| 3/8" | 0.375" | 5" | 1.5" | Round | 3/8" | Notched | Rockwell C60 | 0000000 | 00000 |
| 25/64" | 0.3906" | 5 1/4" | 1.56" | Round | 25/64" | Notched | Rockwell C60 | 0000000 | 00000 |
| 13/32" | 0.4063" | 5 1/4" | 1.62" | Round | 13/32" | Notched | Rockwell C60 | 0000000 | 00000 |
| 27/64" | 0.4219" | 5 1/2" | 1.68" | Round | 27/64" | Notched | Rockwell C60 | 0000000 | 00000 |
| 7/16" | 0.4375" | 5 1/2" | 1.75" | Round | 7/16" | Notched | Rockwell C60 | 0000000 | 00000 |
| 15/32" | 0.4688" | 5 3/4" | 1.87" | Round | 15/32" | Notched | Rockwell C60 | 0000000 | 00000 |
| 1/2" | 0.5" | 6" | 2" | Round | 1/2" | Notched | Rockwell C60 | 0000000 | 00000 |
| 17/32" | 0.5313" | 6" | 2.12" | Round | 17/32" | Notched | Rockwell C60 | 0000000 | 00000 |
| 9/16" | 0.5625" | 6" | 2.25" | Round | 9/16" | Notched | Rockwell C60 | 0000000 | 00000 |
| 5/8" | 0.625" | 7" | 2.5" | Round | 5/8" | Notched | Rockwell C60 | 0000000 | 00000 |
| 3/4" | 0.75" | 8" | 3" | Round | 3/4" | Notched | Rockwell C60 | 0000000 | 000000 |
Metric | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
| 5.0 mm | 0.1968" | 95mm | 20mm | Round | 5mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 5.5 mm | 0.2165" | 95mm | 22mm | Round | 5.5mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 6.0 mm | 0.2362" | 102mm | 24mm | Round | 6mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 6.5 mm | 0.2559" | 108mm | 26mm | Round | 6.5mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 7.0 mm | 0.2756" | 108mm | 28mm | Round | 7mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 7.5 mm | 0.2953" | 114mm | 30mm | Round | 7.5mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 8.0 mm | 0.315" | 114mm | 32mm | Round | 8mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 8.5 mm | 0.3346" | 121mm | 34mm | Round | 8.5mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 9.0 mm | 0.3543" | 127mm | 36mm | Round | 9mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 9.5 mm | 0.374" | 127mm | 38mm | Round | 9.5mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 10.0 mm | 0.3937" | 133mm | 40mm | Round | 10mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 10.5 mm | 0.4134" | 140mm | 42mm | Round | 10.5mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 11.0 mm | 0.4331" | 140mm | 44mm | Round | 11mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 11.5 mm | 0.4528" | 146mm | 46mm | Round | 11.5mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 12.0 mm | 0.4724" | 146mm | 48mm | Round | 12mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 12.5 mm | 0.4921" | 152mm | 50mm | Round | 12.5mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 13.0 mm | 0.5118" | 152mm | 52mm | Round | 13mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 13.5 mm | 0.5315" | 152mm | 54mm | Round | 13.5mm | Notched | Rockwell C60 | 0000000 | 00000 |
| 14.0 mm | 0.5512" | 152mm | 56mm | Round | 14mm | Notched | Rockwell C60 | 0000000 | 00000 |