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Compare material, finish, length class, and decimal size equivalents.
Reduced-Shank High-Speed Steel Drill Bits
 |
Jobbers' 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.
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 | |||||||||||
| 1 15/32" | 1.4688" | 6" | 2.1" | Reduced Round | 1/2" | Standard | Chicago-Latrobe | 2933A89 | 0000000 | ||
| 1 15/32" | 1.4688" | 6" | 2.1" | Reduced Round/3-Flat | 1/2" | Standard | Chicago-Latrobe | 29415A79 | 000000 | ||
| 1 15/32" | 1.4688" | 6" | 2.1" | Reduced Round | 3/4" | Standard | Dormer Pramet | 8772A38 | 000000 | ||
