About Drill Bits
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Drill Bit Decimal Size Equivalents
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Drill Bits
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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.
Drill bits with a split point keep centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
Shank | Each | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
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 | ||||||||||
7.2 mm | 0.2835" | 109mm | 54.6mm | Round | 7.2mm | Standard | DIN 338 | Steel, Iron, Stainless Steel | 00000000 | 00000 |
Black-and-Gold Oxide High-Speed Steel | ||||||||||
7.2 mm | 0.2835" | 108mm | 71.4mm | Round | 7.2mm | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 000000000 | 0000 |
Short-Length Drill Bits
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Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'- and maintenance-length drill bits.
Black-oxide drill bits produce less friction than uncoated drill bits.
Drill bits with a split point keep centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
Shank | Each | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
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 | ||||||||||
7.2 mm | 0.2835" | 74mm | 34mm | Round | 7.2mm | Split | DIN 1897 | Steel, Iron, Stainless Steel | 000000000 | 00000 |
Chip-Clearing Cobalt Steel Drill Bits
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The parabolic spiral flutes lift chips out of the hole, reducing clogging and improving coolant flow. 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. All are jobbers’ length so they have the rigidity and length required for most applications. A split point keeps the bit centered without a pilot hole.
Shank | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | |
Metric—Parabolic Spiral Flute | ||||||||||
Uncoated Cobalt Steel | ||||||||||
7.2 mm | 0.2835" | 109mm | 69mm | Round | 7.2mm | Split | DIN 338 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |