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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
 |
Jobbers' Length Round Shank |
 |
Jobbers' Length Morse Taper Shank |
 |
Short Length Round Shank |
 |
Extended Length Round Shank |
 |
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.
Short Length—The most rigid bits for drilling the straightest holes.
Extended Length—Drill through panels and thick workpieces with our longest bits. Their length is good for creating deep holes but makes them less rigid than other bits. As a result, they are more prone to wobbling or breaking, especially when drilling hard materials.
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.
Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.
Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | |||||||||||
Black Oxide | |||||||||||
| 39/64" | 0.6094" | 7 1/8" | 4.27" | Round | 39/64" | Standard | Chicago-Latrobe | 2931A51 | 000000 | ||
| 39/64" | 0.6094" | 8 3/4" | 3.96" | Morse Taper | Morse 2 | Standard | Chicago-Latrobe | 2929A382 | 00000 | ||
Titanium Nitride (TiN) Coated | |||||||||||
| 39/64" | 0.6094" | 7 1/8" | 4.27" | Round | 39/64" | Standard | Chicago-Latrobe | 3022A69 | 00000 | ||
Uncoated | |||||||||||
| 39/64" | 0.6094" | 7 1/8" | 4.27" | Round | 39/64" | Standard | Viking Norseman Drill | 8870A53 | 00000 | ||
Short Length | |||||||||||
Uncoated | |||||||||||
| 39/64" | 0.6094" | 4 1/4" | 1.83" | Round | 39/64" | Standard | Chicago-Latrobe | 8947A247 | 00000 | ||
Extended Length | |||||||||||
Black Oxide | |||||||||||
| 39/64" | 0.6094" | 8 3/4" | 3.96" | Round | 39/64" | Standard | Chicago-Latrobe | 29315A168 | 00000 | ||
| 39/64" | 0.6094" | 12" | 7.78" | Round | 39/64" | Standard | Dormer Pramet | 2939A45 | 00000 | ||
Reduced-Shank High-Speed Steel Drill Bits
 |
Jobbers' Length |
 |
Extended Length |
 | |
Split | Standard |
Cut large holes with drill presses and portable drills that have a standard-size chuck. The shank on these bits has a smaller diameter than the cutting tip. High-speed steel is good for general purpose drilling in most metals. Also known as Silver and Deming bits.
Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
Extended Length—Drill through panels and thick workpieces with our longest bits. Their length is good for creating deep holes but makes them less rigid than other bits. As a result, they are more prone to wobbling or breaking, especially when drilling hard materials.
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.
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | |||||||||||
Black Oxide | |||||||||||
| 39/64" | 0.6094" | 6" | 2.1" | Reduced Round | 1/2" | Standard | Chicago-Latrobe | 2933A54 | 000000 | ||
| 39/64" | 0.6094" | 6" | 2.1" | Reduced Round/3-Flat | 1/2" | Split | Viking Norseman Drill | 2905A17 | 00000 | ||
Extended Length | |||||||||||
Black Oxide | |||||||||||
| 39/64" | 0.6094" | 12" | 9" | Reduced Round | 1/2" | Standard | Republic Drill | 2464A15 | 00000 | ||
| 39/64" | 0.6094" | 18" | 12" | Reduced Round | 1/2" | Standard | Republic Drill | 2464A45 | 000000 | ||
Drill Bit Guides
 |  |
For Drill Bit Size | For Drill Bit Size Decimal Equiv. | Lg. | Wd. | Ht. | Material | Each | ||
|---|---|---|---|---|---|---|---|---|
| 37/64", 33/64", 17/32", 35/64", 9/16", 19/32", 39/64", 5/8" | 0.5156", 0.5313", 0.5469", 0.5625", 0.5781", 0.5938", 0.6094", 0.6250" | 5 1/2" | 1 1/8" | 1 1/8" | Steel | 9550T112 | 000000 |
Reduced-Shank Cobalt Steel Drill Bits
 |
Jobbers' Length |
|
Split |
More wear resistant than high-speed steel, these bits cut large holes with tools that have a standard-size chuck. The shank has a smaller diameter than the cutting tip and fits drill presses and portable drills. Cobalt steel bits last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without being damaged on hard materials such as nickel. Also known as Silver and Deming bits.
Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
Uncoated—Polished to eject chips, these are also known as bright finish bits.
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | |||||||||||
Uncoated | |||||||||||
| 39/64" | 0.6094" | 6" | 2.1" | Reduced Round | 1/2" | Split | Chicago-Latrobe | 8939A45 | 000000 | ||
Carbide-Tipped Drill Bits
 |
Extended Length Round Shank |
|
Standard |
Performance similar to solid carbide but at a lower price point. Like carbide bits, these are stronger than cobalt and high-speed steel and maintain their sharp edges when drilling abrasive material. However, when drilling tough metals like iron and hardened steel, upgrade to carbide for longer life.
Extended Length—Drill through panels and thick workpieces with our longest bits. Their length is good for creating deep holes but makes them less rigid than other bits. As a result, they are more prone to wobbling or breaking, especially when drilling hard materials.
Shank | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equiv. | Overall Lg. | Max. Drilling Dp. | Type | Size | Drill Bit Point Type | Mfr. | Each | |||
Extended Length | |||||||||||
Uncoated | |||||||||||
| 39/64" | 0.6094" | 8 3/4" | 3.96" | Round | 39/64" | Standard | ICS | 29465A45 | 000000 | ||
Cobalt Steel Drill Bits
 |
Jobbers' Length Round Shank |
|
Split |
Tough and wear resistant, cobalt steel bits last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without being damaged on hard materials, such as nickel.
Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.
Uncoated—Polished to eject chips, these are also known as bright finish bits.
