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About Drill Bits
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Compare material, finish, length class, and decimal size equivalents.
High-Speed Steel Drill Bits
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Jobbers' Length Round Shank |
 |
Split |
 |
Standard |
Our basic drill bits are also the most versatile. Cut holes in a variety of metals, from the softest aluminum to the hardest steel.
Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.
Black/Gold Oxide—Like black oxide, this finish adds wear resistance and reduces friction for improved chip flow. Because it’s less prone to flaking off, it offers better rust protection when bits aren't in use.
Undersized Hardened Multipurpose M2 High-Speed Tool Steel Rods
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These rods, also known as drill blanks, have an undersized diameter for machining your own drill bits. They're hardened for increased abrasion and impact resistance. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.
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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Dia., mm | Dia. Tolerance, mm | Drill Bit Size, mm | Lg. | Yield Strength | Hardness | Mechanical Finish | Each | ||
|---|---|---|---|---|---|---|---|---|---|
| 9.9 | -0.005 to 0 | 9.9 | 5 1/8" | Not Rated | Rockwell C60 (Extra Hard) | Precision Ground | 2900A379 | 000000 |
