System of Measurement System of Measurement |
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Decimal Size Equivalent Decimal Size Equivalent |
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Shank Type Shank Type |
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 | Reduced Round |
Length Class Length Class |
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| Reduced Shank Length |
Shank Size Shank Size |
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For Use On For Use On |
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Point Style Point Style |
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| Standard |
Point Angle Point Angle |
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Bit Style Bit Style |
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 | Spiral Flute |
Maximum Drilling Depth Maximum Drilling Depth |
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Flute Direction Flute Direction |
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| Right Hand |
Material Material |
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Finish Finish |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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Individual/Set Individual/Set |
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Drill Bit Decimal Size Equivalents
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About Drill Bits
More
1/4" Diameter Reduced-Shank Drill Bits
The shank has a smaller diameter than the tip, allowing you to drill large holes with machines that have small-capacity chucks.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||
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| Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | |
Inch | |||||||||
Black-Oxide High-Speed Steel | |||||||||
| 17/64" | 0.2656" | 3 1/2" | 1.88" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |
| 9/32" | 0.2813" | 3 5/8" | 1.97" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 0000 |
| 5/16" | 0.3125" | 3 7/8" | 2.19" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 0000 |
| 3/8" | 0.375" | 4 1/4" | 2.56" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 0000 |
| 25/64" | 0.3906" | 4 3/8" | 2.63" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 0000 |
| 13/32" | 0.4063" | 4 1/2" | 2.75" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 0000 |
| 27/64" | 0.4219" | 4 5/8" | 2.84" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 0000 |
| 7/16" | 0.4375" | 4 3/4" | 2.94" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 0000 |
| 29/64" | 0.4531" | 4 3/4" | 3.03" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |
| 15/32" | 0.4688" | 4 7/8" | 3.13" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |
| 31/64" | 0.4844" | 5" | 3.22" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |
| 1/2" | 0.5" | 5" | 3.22" | Reduced Round | 1/4" | Standard | Steel, Iron, Stainless Steel | 0000000 | 00000 |