2/Pack Solid Carbide Drill Bit for Hardened Steel Hard Ness HRa 91.3 Aerospace Standard K20 Tungsten Carbide Jobber Length Twist Drill for Metal 118 Degree Four Facet Point Fractional Size (3/16")
- ...mooth finish on the bits increases chip flow. Spiral flutes are constructed with a higher flute angle to remove chips more easily..
- ★【Specs】 Flute Length: 1-5/8 inch, Overall Length: 2-3/4 inch, Drill Size: 3/16 inch // Tungsten Carbide Grade (ISO): K20 // Binder: %8 Cobalt // Hardness: 91.3 HRa // Uncoated.
- Tungsten carbide is a composite material, although it looks like a metal, it is a composite of Tungsten carbide powder mixed with cobalt as a binder metal, the resulting material is more like a ceramic than a metal. It is a very hard material being a 9 on the Mohs scale where diamond is a 10 and hard steel around 5. It will chew down into most anything but the hardness makes them brittle with virtually no plasticity. Unstable drilling can result in a broken bit. These drills like a.