About Drill Bits
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Drill Bit Decimal Size Equivalents
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Extended-Length Chip-Clearing Drill Bits
Access hard-to-reach spots and drill deep holes. Parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow. The split point keeps the bit centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||
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Drill Bit Size | Decimal Size Equivalent | Type | Size | Point Style | For Use On | Max. Drilling Dp. | Each | |
8" Overall Lg. | ||||||||
Inch—Parabolic Spiral Flute | ||||||||
Uncoated High-Speed Steel | ||||||||
1/8" | 0.125" | Round | 1/8" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.75" | 00000000 | 000000 |
9/64" | 0.1406" | Round | 9/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.71" | 00000000 | 00000 |
5/32" | 0.1563" | Round | 5/32" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.68" | 00000000 | 00000 |
11/64" | 0.1719" | Round | 11/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.65" | 00000000 | 00000 |
3/16" | 0.1875" | Round | 3/16" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.62" | 00000000 | 00000 |
13/64" | 0.2031" | Round | 13/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.59" | 00000000 | 00000 |
7/32" | 0.2188" | Round | 7/32" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.56" | 00000000 | 00000 |
15/64" | 0.2344" | Round | 15/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.53" | 00000000 | 00000 |
1/4" | 0.25" | Round | 1/4" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.5" | 00000000 | 00000 |
17/64" | 0.2656" | Round | 17/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.46" | 00000000 | 00000 |
9/32" | 0.2813" | Round | 9/32" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.43" | 00000000 | 00000 |
5/16" | 0.3125" | Round | 5/16" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.37" | 00000000 | 00000 |
21/64" | 0.3281" | Round | 21/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.34" | 00000000 | 00000 |
11/32" | 0.3438" | Round | 11/32" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.31" | 00000000 | 00000 |
3/8" | 0.375" | Round | 3/8" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.25" | 00000000 | 00000 |
25/64" | 0.3906" | Round | 25/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.21" | 00000000 | 00000 |
7/16" | 0.4375" | Round | 7/16" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5.12" | 00000000 | 00000 |
1/2" | 0.5" | Round | 1/2" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 5" | 00000000 | 00000 |
12" Overall Lg. | ||||||||
Inch—Parabolic Spiral Flute | ||||||||
Uncoated High-Speed Steel | ||||||||
1/8" | 0.125" | Round | 1/8" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.75" | 00000000 | 00000 |
5/32" | 0.1563" | Round | 5/32" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.68" | 00000000 | 00000 |
11/64" | 0.1719" | Round | 11/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.65" | 00000000 | 00000 |
3/16" | 0.1875" | Round | 3/16" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.62" | 00000000 | 00000 |
13/64" | 0.2031" | Round | 13/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.59" | 00000000 | 00000 |
7/32" | 0.2188" | Round | 7/32" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.56" | 00000000 | 00000 |
1/4" | 0.25" | Round | 1/4" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.5" | 00000000 | 00000 |
17/64" | 0.2656" | Round | 17/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.46" | 00000000 | 00000 |
9/32" | 0.2813" | Round | 9/32" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.43" | 00000000 | 00000 |
5/16" | 0.3125" | Round | 5/16" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.37" | 00000000 | 00000 |
21/64" | 0.3281" | Round | 21/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.34" | 00000000 | 00000 |
11/32" | 0.3438" | Round | 11/32" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.31" | 00000000 | 00000 |
23/64" | 0.3594" | Round | 23/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.28" | 00000000 | 00000 |
3/8" | 0.375" | Round | 3/8" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.25" | 00000000 | 00000 |
25/64" | 0.3906" | Round | 25/64" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.21" | 00000000 | 00000 |
13/32" | 0.4063" | Round | 13/32" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.18" | 00000000 | 00000 |
7/16" | 0.4375" | Round | 7/16" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8.12" | 00000000 | 00000 |
1/2" | 0.5" | Round | 1/2" | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 8" | 00000000 | 000000 |