Irwin - 5/16" 135° Cobalt Jobber Drill - Bright Finish, Left Hand Cut, Spiral Flute, Straight Shank, 3-3/4" OAL, Split Point
Item #: 57822272
Brand: Irwin
Model #: 31520
Exact Tooling IR#: 04
Features and Benefits
Cobalt is harder than high speed steel and provides better wear resistance. It is commonly used on high tensile alloys.
Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.
Spiral flutes are constructed with a higher flute angle to remove chips more easily.
| Product Specifications | |
|---|---|
| Drill Bit Size (Inch) | 5/16 |
| Drill Bit Size (Decimal Inch) | 0.3125 |
| Drill Point Angle | 135 |
| Drill Bit Material | Cobalt |
| Drill Bit Finish/Coating | Bright |
| Flute Type | Spiral |
| Cutting Direction | Left Hand |
| Shank Type | Straight |
| Coolant Through | No |
| Flute Length (Inch) | 2-1/8 |
| Flute Length (Decimal Inch) | 2.1250 |
| Overall Length (Decimal Inch) | 3.7500 |
| Overall Length (Inch) | 3-3/4 |
| Point Type | Split Point |
| Spiral Type | Regular Spiral |
| Web Configuration | Tapered |
| Web Thinning | Web-Thinned |
| Material Grade | M42 |
| Series/List | 315 |
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