VALYRIANTOOL is a professional manufacturer and enterprise for all kinds of drill bits and cutting tools. After over 15 years development, our main products are expended to: Metal working drilling tools, Stone working drilling tools, Wood working drilling tools, Screwdriving tools, Threading tools, Packaging & Tool sets.
Cobalt drill bits are not made of pure cobalt, but rather a steel alloy with certain percent cobalt. The 5-percent alloy is known as M35 grade. The cobalt increases the strength of the steel and makes it more heat-resistant; this is an important factor in drilling hard materials because the friction of metal against metal can produce high temperatures that damage the material or the drill bit.
Cobalt bits are more expensive than ordinary HSS drill bits. But if you regularly drill metals, they are a good investment since they tend to last longer. With an extended life, you can lower cost per hole drilled.
Heavy-duty, fully ground body construction.
High flow spiral design for the fastest removal rate and for thick material.
Best for portable drills. Reduce drill walking, require less force than 118° point.
Self-centering split point allows you to drill directly to the size needed without any pre-drilling.
Cobalt drill bits used in: cast iron/zinc alloy/304 stainless steel/low carbon steel/aluminum/copper/plastic.
| Diameter | 1/8" | 3/16" | 1/4" | 5/16" | 1/16"-3/8" | 1/16"-1/2" |
|---|---|---|---|---|---|---|
| Quantity | 10PCS | 10PCS | 10PCS | 5PCS | 21PCS | 29PCS |