About Drill Bits
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Drill Bit Decimal Size Equivalents
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About Countersinks
Countersinks cut a cone-shaped opening to install screws and rivets flush with a surface or hold workpieces between centers on a lathe. They can also be used for chamfering and deburring.
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Cobalt Steel Drill Bit Sets
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.
Titanium-nitride (TiN) coated drill bits last longer and can drill at higher speeds 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.
| Number of Pieces | Drill Bit Sizes Included | Point Style | Specifications Met | For Use On | Each | |
Inch | ||||||
|---|---|---|---|---|---|---|
Uncoated Cobalt Steel | ||||||
| 13 | 1/16"-1/4" (increments of 1/64") | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
| 15 | 1/16"-1/2" (increments of 1/32") | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
| 21 | 1/16"-3/8" (increments of 1/64") | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
| 29 | 1/16"-1/2" (increments of 1/64") | Split | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Titanium-Nitride (TiN) Coated Cobalt Steel | ||||||
| 13 | 1/16"-1/4" (increments of 1/64") | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 00000 |
| 15 | 1/16"-1/2" (increments of 1/32") | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 000000 |
| 21 | 1/16"-3/8" (increments of 1/64") | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 000000 |
| 29 | 1/16"-1/2" (increments of 1/64") | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 00000000 | 000000 |
Wire Gauge | ||||||
Uncoated Cobalt Steel | ||||||
| 20 | 80-61 ga | Standard | NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 0000000 | 00000 |
| 60 | 60-53 ga 52-1 ga | Standard Split | NAS907 Type J NAS907 Type J | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Letter | ||||||
Uncoated Cobalt Steel | ||||||
| 26 | A-Z | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Metric | ||||||
Uncoated Cobalt Steel | ||||||
| 13 | 1.0 mm and 1.5mm, 2.0-7.0 mm (increments of 0.5 mm) | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 00000 |
| 19 | 1.0 mm and 1.5 mm, 2.0-10.0 mm (increments of 0.5 mm) | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 000000 |
| 25 | 1.0 mm and 1.5 mm, 2.0-13.0 mm (increments of 0.5 mm) | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 000000 |
| 41 | 6.0-10.0 mm (increments of 0.1 mm) | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 00000000 | 000000 |
Inch, Wire Gauge, Letter | ||||||
Uncoated Cobalt Steel | ||||||
| 115 | 1/16"-1/2" (increments of 1/64"), 52-1 ga, A-Z 60-53 ga | Split Standard | NAS907 Type J NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Inch, Wire Gauge, Metric | ||||||
Uncoated Cobalt Steel | ||||||
| 114 | 1/16"-1/2" (increments of 1/64") 60-1 ga 1.0-13.0 mm (increments of 0.5 mm) | Split | NAS907 Type J | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Short-Flute Cobalt Steel Drill Bit Sets
The short flutes on these jobbers'-length bits provide increased rigidity for drilling straighter holes. 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. A split point keeps the bit centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
| Number of Pieces | Drill Bit Sizes Included | Point Style | Specifications Met | For Use On | Each | |
Inch | ||||||
|---|---|---|---|---|---|---|
Black-Oxide Cobalt Steel | ||||||
| 29 | 1/16"-1/2" (increments of 1/64") | Split | NAS907 Type D | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium | 00000000 | 0000000 |
Short-Length Cobalt Steel Drill Bit Sets
Also known as screw-machine and stub-length bits, these provide maximum rigidity for drilling straighter holes than jobbers'-length drill bits. 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.
Drill bits with a split point keep centered without a pilot hole.
For technical drawings and 3-D models, click on a part number.
| Number of Pieces | Drill Bit Sizes Included | Point Style | For Use On | Each | |
Inch | |||||
|---|---|---|---|---|---|
Uncoated Cobalt Steel | |||||
| 15 | 1/16"-1/2" (increments of 1/32") | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 0000000 |
| 29 | 1/16"-1/2" (increments of 1/64") | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Wire Gauge | |||||
Uncoated Cobalt Steel | |||||
| 60 | 60-53 ga 52-1 ga | Standard Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Letter | |||||
Uncoated Cobalt Steel | |||||
| 26 | A-Z | Split | Steel, Hardened Steel, Iron, Stainless Steel, Nickel | 0000000 | 000000 |
Cobalt Steel 1/2" Diameter Reduced-Shank Drill Bit Sets
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.
For technical drawings and 3-D models, click on a part number.
| Number of Pieces | Drill Bit Sizes Included | Shank Size | Point Style | For Use On | Each | |
Inch | ||||||
|---|---|---|---|---|---|---|
Uncoated Cobalt Steel | ||||||
| 8 | 9/16"-1" (increments of 1/16") | 1/2" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel | 0000000 | 0000000 |
Cobalt Steel Drill-Point Countersink Sets for Lathe Centers
With more heat and abrasion resistance than high-speed steel, cobalt steel is often used on hard-to-machine materials. The countersinks in this set have a 60° countersink angles that’s compatible with the profile of centers on a lathe. They have a small drill point on the tip for drilling and countersinking holes with the same tool. The drill point creates a small gap that prevents damage to the points of live or dead centers. Turn the countersink around for a sharp cutting edge when one end dulls.
For technical drawings and 3-D models, click on a part number.
60° Countersink Angle | ||||||||
|---|---|---|---|---|---|---|---|---|
| Countersink Trade Size | Number of Pieces | Number of Flutes | Number of Countersinking Ends | Shank Type | For Use On | Container Type | Each | |
Uncoated Cobalt Steel | ||||||||
| 1, 2, 3, 4, 5 | 5 | 2 | 2 | Round | Aluminum, Brass, Bronze, Hardened Steel, Iron, Nickel, Plastic, Stainless Steel, Steel, Titanium | Plastic Case | 000000 | 000000 |
Tap and Drill Bit Sets
Drill and tap a variety of hole sizes. These taps and drill bits are for use on metal and plastic.
Cobalt steel taps and drill bits have higher strength and wear resistance than carbon steel and high-speed steel taps and drill bits.
Plug-chamfer taps are a versatile choice for most tapping applications. With 3-5 chamfered cutting threads, they require moderate torque and are often used for start-to-finish tapping of through holes and closed-end holes. However, they do not start threads as easily as taper chamfers. When using them to tap closed-end holes, be sure to leave sufficient space at the bottom for chips to accumulate.
For technical drawings and 3-D models, click on a part number.
| No. of Pieces | Chamfer Type | Tap Sizes Included | No. of Flutes | Drill Bit Sizes Included | Drill Bit Material | Container Type | Each | |
Uncoated Cobalt Steel Taps | ||||||||
|---|---|---|---|---|---|---|---|---|
| 18 | Plug | 1 each of sizes: 6-32 8-32 10-24 10-32 1/4"-20 5/16"-18 3/8"-16 7/16"-14 1/2"-13 | 2, 3 | 27/64" 5/16" 36 ga 29 ga. 25 ga. 21 ga. 7 ga. F U | Uncoated Cobalt Steel | Metal Case | 0000000 | 0000000 |