![]() ![]() Cobalt ensures the bit is heat resistant.Cobalt will do everything the M2 bit can do, and more.Will drill through hardened steel like stainless as well as mild steel.Used primarily for drilling Stainless Steel, these bits gain the property of endurance against the high temperature due to cobalt metal.This HSS material was developed to tackle drilling of tough materials like Stainless steel, Inconel, tool steels and titanium alloys. ![]() The key purpose of adding up the cobalt is to enhance the heat resistance capacity and durability of the bits, however, it is very important to note that M35 bits work best and last longest if run at slow working speeds with lubricant. M35 is similar to M2, but with 5% cobalt added – NOTE: M42 is almost the same but with 8% cobalt and is generally considered a very specialised bit and is more brittle than M35. Will not last as long as M35 cobalt bitsīUY Fully Ground, M2, 135 Degree Split Point Smith & ARROW Drill Bits Here.Can lose their sharpened edge quicker than cobalt bits. ![]()
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