Drill Bit Decimal Size Equivalents
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About Drill Bits
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Drill Bits for Glass and Ceramic
The spear-shaped point drills smoothly through glass and ceramic, reducing the chance of chipping and cracking. Coolant, such as water, is required when drilling with these bits.
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 | Each | |
Inch | ||||||||
Uncoated Carbide-Tipped Steel | ||||||||
| 1/8" | 0.125" | 2 1/4" | 1" | Round | 7/64" | Standard | 000000 | 00000 |
| 3/16" | 0.1875" | 2 1/4" | 1" | Round | 5/32" | Standard | 000000 | 0000 |
| 1/4" | 0.25" | 2 5/8" | 1" | Round | 11/64" | Standard | 000000 | 0000 |
| 5/16" | 0.3125" | 3" | 1" | Round | 7/32" | Standard | 000000 | 0000 |
| 3/8" | 0.375" | 3 5/8" | 1" | Round | 15/64" | Standard | 000000 | 00000 |
| 1/2" | 0.5" | 3 5/8" | 1" | Round | 5/16" | Standard | 000000 | 00000 |
| 5/8" | 0.625" | 3 3/4" | 0.25" | Round | 5/16" | Standard | 0000000 | 00000 |
| 3/4" | 0.75" | 4" | 0.25" | Round | 5/16" | Standard | 0000000 | 00000 |
| 7/8" | 0.875" | 4" | 0.25" | Round | 5/16" | Standard | 0000000 | 00000 |
| 1" | 1" | 4" | 0.25" | Round | 5/16" | Standard | 0000000 | 00000 |
Drill Bits for Stone, Granite, and Slate
Multiple cutting edges on the tip allow these bits to drill quickly through natural stone, granite, and other hard, abrasive material.
Drill bits with flats on shank have three flat sides to prevent the bit from slipping in the drill chuck.
Shank | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Features | Each | |
Inch | |||||||||
Titanium-Nitride (TiN) Coated Carbide-Tipped Steel | |||||||||
| 1/8" | 0.125" | 2" | 2" | Round | 1/8" | Standard | __ | 000000 | 00000 |
| 3/16" | 0.1875" | 2" | 2" | Round | 3/16" | Standard | __ | 000000 | 0000 |
| 1/4" | 0.25" | 2 1/4" | 2.25" | Round | 1/4" | Standard | __ | 000000 | 00000 |
| 5/16" | 0.3125" | 2" | 2" | Round | 1/4" | Standard | __ | 000000 | 00000 |
| 3/8" | 0.375" | 3 3/4" | 3.75" | Round | 3/8" | Standard | Flats on Shank | 000000 | 00000 |
| 1/2" | 0.5" | 3 3/4" | 3.75" | Round | 3/8" | Standard | Flats on Shank | 000000 | 00000 |