About Drill Bits
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Drill Bit Decimal Size Equivalents
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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 | Pkg. | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Specifications Met | For Use On | Each | Pkg. Qty. | Pkg. | ||
Metric | |||||||||||||
Black-and-Gold Oxide High-Speed Steel | |||||||||||||
| 8.8 mm | 0.3465" | 124mm | 87.7mm | Round | 8.8mm | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 000000000 | 00000 | __ | 000000 | 00 |
| 8.9 mm | 0.3504" | 124mm | 87.7mm | Round | 8.9mm | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 000000000 | 0000 | __ | 000000 | 00 |
| 9.0 mm | 0.3543" | 124mm | 87.7mm | Round | 9mm | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 000000000 | 0000 | 5 | 000000000 | 000000 |
| 9.1 mm | 0.3583" | 124mm | 87.7mm | Round | 9.1mm | Split | NAS907 Type B | Steel, Iron, Stainless Steel | 000000000 | 0000 | __ | 000000 | 00 |
Uncoated High-Speed Steel | |||||||||||||
| 9.0 mm | 0.3543" | 124mm | 81mm | Round | 9mm | Standard | __ | Steel, Iron, Stainless Steel, Aluminum, Bronze, Plastic | 00000000 | 0000 | __ | 000000 | 00 |
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.
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 | Specifications Met | For Use On | Each | |
Metric—Parabolic Spiral Flute | ||||||||||
Uncoated Cobalt Steel | ||||||||||
| 9.0 mm | 0.3543" | 124mm | 81mm | Round | 9mm | Split | DIN 338 | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 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 | Split Point | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Type | Size | For Use On | Max. Drilling Dp. | Point Angle | Each | |
Metric | |||||||||
Uncoated Carbide-Tipped Steel | |||||||||
| 9.0 mm | 0.3543" | 124mm | Round | 9mm | Iron, Aluminum, Brass, Bronze, Plastic | 89mm | 135° | 00000000 | 000000 |
Cobalt Steel Left-Hand Drill Bits
With better heat and wear resistance than high-speed steel, cobalt steel bits can run up to 25% faster and have a longer tool life. Also known as reverse-flute bits, the flutes spiral in the opposite direction of other bits. Use in counterclockwise drilling applications such as removing broken screws. These bits are maintenance length, also known as mechanics’ length. They are shorter and more rigid than jobbers’ bits but longer than short-length bits. The split point keeps the bit centered without a pilot hole.
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 | For Use On | Specifications Met | Each | |
Metric | ||||||||||
Uncoated Cobalt Steel | ||||||||||
| 9.0 mm | 0.3543" | 124mm | 89mm | Round | 9mm | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | NAS907 Type J | 0000000 | 000000 |