Drill Bit Decimal Size Equivalents
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About Drill Bits
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Short-Length Cobalt Steel Drill Bits
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.
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.
Shank | Each | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | For Use On | Each | |
Wire Gauge | |||||||||
Titanium-Nitride (TiN) Coated Cobalt Steel | |||||||||
| 52 ga. | 0.0635" | 1 11/16" | 0.25" | Round | 0.0635" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 00000 |
| 51 ga. | 0.067" | 1 11/16" | 0.26" | Round | 0.067" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 0000 |
| 50 ga. | 0.07" | 1 11/16" | 0.28" | Round | 0.07" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 0000 |
| 49 ga. | 0.073" | 1 11/16" | 0.29" | Round | 0.073" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 0000 |
| 48 ga. | 0.076" | 1 11/16" | 0.3" | Round | 0.076" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 0000 |
| 47 ga. | 0.0785" | 1 11/16" | 0.31" | Round | 0.0785" | Split | Steel, Hardened Steel, Tool Steel, Iron, Stainless Steel, Nickel, Titanium, Fiberglass | 000000000 | 0000 |
Drill Bits for Spot Welds
Three drill points allow these bits to separate spot-welded panels without damaging the bottom panel.
Drill bits with flat on shank are used in spot-weld drills, such as Spitznagel.
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 | Features | Specifications Met | For Use On | Each | |
Inch | |||||||||||
Uncoated High-Speed Steel | |||||||||||
| 5/16" | 0.3125" | 1 11/16" | 0.04" | Round | 5/16" | Brad | Flat on Shank | NAS907 Type J | Steel, Iron, Aluminum, Brass, Bronze, Plastic | 000000 | 000000 |
Microstix Bits
These bits have a 4 mm HIOS or half-moon shank. To fit in a 1/4" hex shank driver, use an adapter (sold separately).
For technical drawings and 3-D models, click on a part number.