Filter by
Product Family
Drill Bit Size
Decimal Size Equivalent
For Use With
Length Class
Drill Bit Point Type
Manufacturer
U.S.–Mexico–Canada Agreement (USMCA) Qualifying
Sold As
Export Control Classification Number (ECCN)
Bit Style
Flute Direction
Shank Type
Finish
Specifications Met
Chip-Clearing Cobalt Steel Drill Bits
 |  |
Jobbers' Length Parabolic Flute Round Shank | Split |
Avoid clogs and dissipate heat with cobalt bits that last at least twice as long as high-speed steel. The flutes clear chips to improve coolant flow and prevent damage to the bit and the hole. They also speed up drilling since you don't have to stop to clear the bit manually.
Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.
Uncoated—Polished to eject chips, these are also known as bright finish bits.
Shank | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Drill Bit Size, mm | Decimal Size Equiv. | Overall Lg., mm | Max. Drilling Dp., mm | Flute Type | Type | Size, mm | Drill Bit Point Type | Mfr. | Each | |||
Jobbers' Length | ||||||||||||
Uncoated | ||||||||||||
| 4.25 | 0.1673" | 75 | 41 | Parabolic | Round | 4.25 | Split | Viking Norseman Drill | 2771N744 | 00000 | ||
Drill Bit Size Gauges
 |
For Metric |
Measure drill bit sizes with these gauges.
For System of Measurement | For Use With | For Drill Bit Size, mm | Wd. | Ht. | Thk. | Material | Color | Mounting Hole Dia. | Each | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Metric | Drills | 1.5, 2.0, 2.25, 2.5, 2.75, 3.0, 3.25, 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 5.25, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5 | 2 1/2" | 6 1/2" | 5/64" | Steel | Silver | 1/8" | 8986A64 | 000000 |
Undersized Hardened Multipurpose M2 High-Speed Tool Steel Rods
 |
These rods, also known as drill blanks, have an undersized diameter for machining your own 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.
%20--%3e%3cg%3e%3cg%20id='Layer_1'%3e%3cpath%20class='cls-1'%20d='M68,27.2c-14.6,0-26.4,11.7-26.4,26.3,0,7,2.8,13.7,7.7,18.7v44.8l18.8-16.1,18.7,16.1v-44.9c10.3-10.3,10.3-27,0-37.3-5-4.9-11.7-7.7-18.7-7.7h0ZM81.3,105l-13.2-11.4-13.2,11.4v-28.7c8.2,4.8,18.3,4.8,26.5,0v28.7ZM76.2,70.8c-5.2,2.5-11.2,2.5-16.4,0-9.5-4.5-13.5-15.9-9-25.4,4.5-9.5,15.9-13.5,25.4-9,9.5,4.5,13.5,15.9,9,25.4-1.9,4-5.1,7.1-9,9Z'/%3e%3cpath%20class='cls-2'%20d='M5.8,95.5c-1.2,0-2.1-1-2.1-2.1,0,0,0,0,0,0V29.4h20.9c2.1,0,3.8-1.7,3.8-3.8V3.7c.2,0,.4,0,.5,0h37.5c1.2,0,2.1,1,2.1,2.1v18.6c1.2,0,2.5.1,3.7.3V5.8C72.2,2.6,69.6,0,66.4,0H28.9c-1.5,0-3,.6-4.1,1.7h-.1c0,.1-23,23.2-23,23.2-1.1,1.1-1.7,2.6-1.7,4.1v64.3c0,3.2,2.6,5.8,5.8,5.8h41.7v-3.7H5.8ZM24.7,7.1v18.7H6L24.7,7.1Z'/%3e%3c/g%3e%3c/g%3e%3c/svg%3e)
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Dia., mm | Dia. Tolerance, mm | Drill Bit Size, mm | Lg. | Yield Strength | Hardness | Mechanical Finish | Each | ||
|---|---|---|---|---|---|---|---|---|---|
| 4.25 | -0.005 to 0 | 4.25 | 3 1/4" | Not Rated | Rockwell C60 (Extra Hard) | Precision Ground | 2900A284 | 00000 |
