About Tool Steel
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Drill Bit Decimal Size Equivalents
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About Drill Bits
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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 | ||||||||||
11.8 mm | 0.4646" | 142mm | 70.4mm | Round | 11.8mm | Standard | DIN 338 | Steel, Iron, Stainless Steel | 00000000 | 000000 |
Black-and-Gold Oxide High-Speed Steel | ||||||||||
11.8 mm | 0.4646" | 146mm | 109.5mm | Round | 11.8mm | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 000000000 | 00000 |
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 | ||||||||||
11.8 mm | 0.4646" | 95mm | 47mm | Round | 11.8mm | Split | DIN 1897 | Steel, Iron, Stainless Steel | 000000000 | 000000 |
Cobalt Steel Drill Bits
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These jobbers'-length bits have the rigidity and length required for most applications. Made of cobalt steel, which has better heat and wear resistance than high-speed steel, they can run up to 25% faster and have a longer tool life.
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 | ||||||||||
Gold-Oxide Cobalt Steel | ||||||||||
11.8 mm | 0.4646" | 142mm | 70.4mm | Round | 11.8mm | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 000000000 | 000000 |
Chip-Clearing Cobalt Steel Drill Bits
![](/prerenderstable/mvPRE/contents/gfx/imagecache/299/29925a924-@halfx_636656239009726213.png?ver=imagenotfound)
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 | ||||||||||
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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—Parabolic Spiral Flute | ||||||||||
Uncoated Cobalt Steel | ||||||||||
11.8 mm | 0.4646" | 142mm | 94mm | Round | 11.8mm | Split | DIN 338 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 000000 |
Drill Bit Drawer Cabinets
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Store multiple bits of each size. These cabinets have drawers marked with the sizes and decimal equivalents. They can be stacked up to three high.
For technical drawings and 3-D models, click on a part number.
Number of | For Drill Bit | Overall | |||||||||
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Compartments | Drawers | Size | Lg. Class | Lg. | Wd. | Ht. | Includes | Material | Features | Each | |
For Metric Drill Bits | |||||||||||
138 | 4 | 0.35-2.5 mm (increments of 0.05 mm) 2.6-10.0 mm (increments of 0.1 mm) 10.2 mm 10.5 mm 10.8 mm 11.0 mm 11.2 mm 11.5 mm 11.8 mm 12.0 mm 12.2 mm 12.5 mm 13.0 mm | Jobbers' Length, Short Length | 26" | 12" | 12 1/2" | Two Keys | Steel | Built-In Lock, Undivided bottom drawer for general storage | 0000000 | 0000000 |
Hardened Undersized High-Speed M2 Tool Steel Rods
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- Yield Strength: Not Rated
- Hardness: Rockwell C60 (Very Hard)
These rods, also known as drill blanks, have an undersized diameter for machining your own jobbers'-length drill bits. They're hardened for increased abrasion and impact resistance. M2 tool steel offers a nice balance of wear resistance and machinability. It has a high molybdenum content, which allows it to maintain sharp cutting edges even at elevated temperatures.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Dia. | Dia. Tolerance | Drill Bit Size | Lg. | Mechanical Finish | Straightness Tolerance | Each | |
11.8mm | -0.0050mm to 0.0000mm | 11.8 mm | 5 3/4" | Precision Ground | 0.012" per ft. | 00000000 | 000000 |