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About Drill Bits
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Compare material, finish, length class, and decimal size equivalents.
Reduced-Shank High-Speed Steel Drill Bits
 |
Jobbers' Length |
 |
Extended Length |
 |
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 | |||||||||||
| 49/64" | 0.7656" | 6" | 2.1" | Reduced Round | 1/2" | Standard | Chicago-Latrobe | 2933A59 | 000000 | ||
| 49/64" | 0.7656" | 6" | 2.1" | Reduced Round/3-Flat | 1/2" | Standard | Chicago-Latrobe | 29415A38 | 00000 | ||
Extended Length | |||||||||||
Black Oxide | |||||||||||
| 49/64" | 0.7656" | 12" | 9" | Reduced Round | 1/2" | Standard | Republic Drill | 2464A25 | 000000 | ||
| 49/64" | 0.7656" | 18" | 12" | Reduced Round | 1/2" | Standard | Republic Drill | 2464A55 | 000000 | ||
High-Speed Steel Drill Bits
 |
Jobbers' Length Morse Taper 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.
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 | |||||||||||
| 49/64" | 0.7656" | 9 7/8" | 4.85" | Morse Taper | Morse 2 | Standard | Chicago-Latrobe | 2929A412 | 000000 | ||
Extended Length | |||||||||||
Black Oxide | |||||||||||
| 49/64" | 0.7656" | 9 7/8" | 4.85" | Round | 49/64" | Standard | Chicago-Latrobe | 29315A186 | 00000 | ||
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 | |||||||||||
| 49/64" | 0.7656" | 6" | 2.1" | Reduced Round | 1/2" | Split | Chicago-Latrobe | 8939A51 | 000000 | ||
Helical Threaded Inserts with Installation Tools
 |
Drill Bit, Installation Tool and Through-Hole Tap |
Quickly restore stripped threads—these inserts come with through-hole taps and installation tools. The tough coils on these inserts expand once installed to anchor in a tapped hole.
Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Inserts Included | Includes | Each | |||
|---|---|---|---|---|---|---|---|---|---|
Pronged | |||||||||
18-8 Stainless Steel | |||||||||
| 3/4"-16 | 1.125" | 49/64" | 0.766" | 4 | Drill Bit Installation Tool Through-Hole Tap | 91732A339 | 0000000 | ||
