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.
Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds than uncoated and oxide-coated drill bits.
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 | ||||||||||
| 15.0 mm | 0.5905" | 169mm | 84mm | Round | 15mm | Standard | DIN 338 | Steel, Iron, Stainless Steel | 00000000 | 000000 |
Titanium-Nitride (TiN) Coated High-Speed Steel | ||||||||||
| 15.0 mm | 0.5905" | 169mm | 84mm | Round | 15mm | Standard | DIN 338 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Aluminum, Brass, Bronze, Plastic | 0000000 | 00000 |
Extended-Length Drill Bits
Access hard-to-reach spots and drill deep holes.
Black-oxide drill bits produce less friction than uncoated drill bits.
Shank | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Specifications Met | Each | |
Metric | ||||||||||
Black-Oxide High-Speed Steel | ||||||||||
| 15.0 mm | 0.5906" | 220mm | 144mm | Round | 15mm | Standard | Steel, Iron | DIN 340 | 000000000 | 000000 |
Uncoated High-Speed Steel | ||||||||||
| 15.0 mm | 0.5905" | 220mm | 114.4mm | Round | 15mm | Standard | Steel, Iron, Aluminum, Brass, Bronze, Plastic | DIN 340 | 00000000 | 00000 |
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 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | ||||||||||
| 15.0 mm | 0.5906" | 169mm | 114mm | Round | 15mm | Split | Steel, Iron, Aluminum, Brass, Bronze, Plastic | DIN 338 | 0000000 | 000000 |
Carbide-Tipped Drill Bits
These jobbers'-length bits have the rigidity and length required for most applications. Made of carbide-tipped steel, which has better wear resistance than high-speed steel and cobalt steel, they maintain a sharper, harder edge at high temperatures for excellent performance on abrasive material, such as plastic. Because they aren’t as brittle as solid carbide bits, they can be used in less rigid setups, such as a hand-held drill.
Drill bits with a split point keep centered without a pilot hole.
Drill bits with 135° point angle produce smaller chips than 118° point to prevent clogging.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Type | Size | For Use On | Max. Drilling Dp. | Point Angle | Each | |
Standard Point | |||||||||
Metric | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
| 15.0 mm | 0.5905" | 181mm | Round | 15mm | Iron, Aluminum, Brass, Bronze, Plastic | 132mm | 118° | 00000000 | 0000000 |
Split Point | |||||||||
Metric | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
| 15.0 mm | 0.5905" | 181mm | Round | 15mm | Iron, Aluminum, Brass, Bronze, Plastic | 132mm | 135° | 00000000 | 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 Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | For Use On | Point Style | Each | |
Drill Bits | |||||||||
Metric | |||||||||
Black-Oxide High-Speed Steel | |||||||||
| 15.0 mm | 0.5905" | 152mm | 53.3mm | Reduced Round | 1/2" | Steel, Iron, Stainless Steel | Standard | 0000000 | 000000 |
Drill Bits with Flats on Shank | |||||||||
Metric | |||||||||
Black and Gold Oxide High-Speed Steel | |||||||||
| 15.0 mm | 0.5906" | 152mm | 63.5mm | Reduced Round | 1/2" | Steel, Iron, Stainless Steel | Split | 0000000 | 00000 |
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 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | |
Metric | |||||||||
Uncoated Cobalt Steel | |||||||||
| 15.0 mm | 0.5906" | 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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |||||||||||
| 15.0 mm | 0.5905" | 2 | 0.7" | 212mm | 83.9mm | Morse Taper | Standard | DIN 345 | Steel, Iron, Stainless Steel | 00000000 | 0000000 |
Drill Bits for Precise Holes in Wood
Three sharp points allow these bits to drill accurate straight and overlapping holes, even across the grain. The center guide point prevents the bit from wandering. Also known as brad-point bits.
High-speed steel drill bits are stronger and more wear resistant than steel drill bits.
For technical drawings and 3-D models, click on a part number.
Shank | ||||||||
|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Each | |
Metric | ||||||||
Uncoated High-Speed Steel | ||||||||
| 15.0 mm | 0.5906" | 140mm | 110mm | Round | 10mm | Brad | 00000000 | 000000 |
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 | ||||||||
|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Each | |
Metric | ||||||||
Uncoated High-Speed Steel | ||||||||
| 15 mm | 0.5906" | 169mm | 114mm | Round | 15mm | Standard | 000000000 | 000000 |
Metric Size Depth-Limiting Drill Bit Stop Collars
Ensure identical hole depths every time. Position the collar on your bit and tighten the set screw.
For technical drawings and 3-D models, click on a part number.
For Drill Bit | |||||||
|---|---|---|---|---|---|---|---|
| Size, mm | Size Decimal Equivalent | Overall Lg. | OD | Hex Key Size for Set Screw | Material | Each | |
| 15.0 | 0.5905" | 1" | 1" | 5/32" | Steel | 00000000 | 000000 |