DORMER - 20mm 135° Spiral Flute Cobalt Screw Machine Drill Bit
Item #: 64220478
Brand: DORMER
Model #: 0017081
Features and Benefits
Cobalt is harder than high speed steel and provides better wear resistance. It is commonly used on high tensile alloys.
Oxide prevents chip building, galling and welding on the workpiece. It is commonly used on low carbons, stainless steel and iron based ferrous metals.
Spiral flutes are constructed of a higher flute angle to remove chips easier.
| Product Specifications | |
|---|---|
| Drill Bit Size (Decimal Inch) | 0.7874 |
| Drill Bit Size (mm) | 20.00 |
| Drill Point Angle | 135 |
| Drill Bit Material | Cobalt |
| Drill Bit Finish/Coating | Oxide |
| Flute Type | Spiral |
| Cutting Direction | Right Hand |
| Shank Type | Straight |
| Flute Length (mm) | 66.00 |
| Flute Length (Decimal Inch) | 2.6004 |
| Overall Length (mm) | 131.00 |
| Overall Length (Decimal Inch) | 5.1614 |
| Flute Length x Diameter Ratio | 2.5xD |
| Point Type | Split Point |
| Shank Diameter (mm) | 20.00 |
| Shank Diameter (Decimal Inch) | 0.7874 |
| Specification Designation | DIN |
| Spiral Type | Regular Spiral |
| Threaded Shank | No |
| Number of Flutes | 2 |
| Web Configuration | Tapered |
| Drill Bit Diameter Tolerance (mm) | 0.000 to -0.033 |
| Specification Number | DIN 1897 |
| Web Thinning | Web-Thinned |
| Series/List | A120 |
| Length Type | Stub |
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