System of Measurement System of Measurement |
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Drill Bit Size Drill Bit Size | Show |
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Drill Bit Size Drill Bit Size | Hide |
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Decimal Size Equivalent Decimal Size Equivalent |
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For Use On For Use On |
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Shank Type Shank Type |
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| Round | Reduced Round |
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| Morse Taper |
Length Class Length Class |
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| Jobbers' Length |
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| Reduced Shank Length |
Material Material |
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Flute Direction Flute Direction |
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| Right Hand |
Bit Style Bit Style |
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 | Spiral Flute |
 | Parabolic Spiral Flute |
Finish Finish |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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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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Individual/Set Individual/Set |
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Morse Taper Number Morse Taper Number |
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Morse Taper Diameter Morse Taper Diameter |
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Drill Bit Decimal Size Equivalents
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About Drill Bits
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Drill Bits
These jobbers'-length bits have the rigidity and length required for most applications.
Black-oxide and black-and-gold-oxide drill bits produce less friction than uncoated drill bits.
For technical drawings and 3-D models, click on a part number.
Shank | Each | |||||||||
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| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | |
Metric | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
| 17.5 mm | 0.689" | 191mm | 95mm | Round | 17.5mm | Standard | DIN 338 | Steel, Iron, Stainless Steel | 00000000 | 000000 |
Chip-Clearing Drill Bits
These jobbers'-length bits have the rigidity and length required for most applications. The flutes are designed to lift chips out of the hole, reducing clogging and improving coolant flow.
Parabolic spiral flute drill bits have wider flutes for more efficient chip evacuation than spiral-flute bits.
Drill bits with a split point keep centered without a pilot hole.
Shank | ||||||||||
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| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Specifications Met | Each | |
Metric—Parabolic Spiral Flute | ||||||||||
Uncoated High-Speed Steel | ||||||||||
| 17.5 mm | 0.689" | 191mm | 130mm | Round | 17.5mm | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | DIN 338 | 0000000 | 000000 |
1/2" 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. Also known as Silver and Deming bits, they have a 1/2” diameter shank.
Drill bits with flats on shank have three flat sides to prevent the bit from slipping in the drill chuck.
Drill bits with a split point keep centered without a pilot hole.
Shank | Drill Bits with Flats on Shank | ||||||||
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| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | For Use On | Point Style | Each | |
Metric | |||||||||
Black and Gold Oxide High-Speed Steel | |||||||||
| 17.5 mm | 0.689" | 152mm | 63.5mm | Reduced Round | 1/2" | Steel, Iron, Stainless Steel | Split | 0000000 | 000000 |
Cobalt Steel 1/2" Diameter Reduced-Shank Drill Bits
With better heat and wear resistance than high-speed steel, these cobalt steel bits can run up to 25% faster and have a longer tool life. The shank has a smaller diameter than the tip, allowing you to drill large holes with machines that have small-capacity chucks. A split point keeps the bit centered without a pilot hole. Also known as Silver and Deming bits, they have a 1/2” diameter shank.
Shank | |||||||||
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| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | |
Metric | |||||||||
Uncoated Cobalt Steel | |||||||||
| 17.5 mm | 0.689" | 152mm | 58mm | Reduced Round | 1/2" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 000000 |
High-Speed Steel Morse Taper-Shank Drill Bits
Install the Morse taper shank directly into the tapered spindle on machines such as drill presses and lathes.
For technical drawings and 3-D models, click on a part number.
Morse Taper | |||||||||||
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| Drill Bit Size | Decimal Size Equivalent | No. | Dia. | Overall Lg. | Max. Drilling Dp. | Shank Type | Point Style | Specifications Met | For Use On | Each | |
Metric | |||||||||||
Black-Oxide High-Speed Steel | |||||||||||
| 17.5 mm | 0.689" | 2 | 0.7" | 228mm | 94.9mm | Morse Taper | Standard | DIN 345 | Steel, Iron, Stainless Steel | 00000000 | 0000000 |
Drill Bits for Plastic
The sharp point allows for gradual penetration to reduce friction and eliminate cracking and chipping when drilling in plastic. These bits are jobbers' length and have the rigidity and length required for most applications.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||
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| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Each | |
Metric | ||||||||
Uncoated High-Speed Steel | ||||||||
| 17.5 mm | 0.689" | 191mm | 130mm | Round | 17.5mm | Standard | 000000000 | 000000 |