Drill Bit Decimal Size Equivalents
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About Drill Bits
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About Tool Steel
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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.
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
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
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
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 | ||||||||||
| 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
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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
- 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 |