M35 Cobalt Drill Bit Sets

M35 cobalt bits contain about 5% cobalt, offering good heat resistance and durability for general hard-metal drilling. M42 bits contain roughly 8% cobalt, providing greater hardness and heat tolerance for extremely tough materials like hardened steel and high-nickel alloys, though they can be slightly more brittle than M35 bits.

Buster's Industrial Supply offers M35 cobalt bits in fractional sizes, including step point sets ranging from 1/8" to 1/2" and jobber length bits available across standard fractional sizing, providing versatile options for a wide range of hole diameters in metalworking and fabrication tasks.

A 135-degree split point is a self-centering tip design that reduces bit walking on contact, allowing for faster, more accurate starts without a pilot hole. This point style is especially useful when drilling into hard or curved metal surfaces common in industrial fabrication.

Yes, M35 cobalt drill bits are specifically formulated to handle stainless steel and other hard, heat-generating materials. The cobalt content increases hardness and heat resistance, allowing the bit to maintain its cutting edge during high-speed drilling of stainless steel, cast iron, and titanium alloys.

A step point drill bit features a staged, stepped tip that allows a single bit to drill multiple hole diameters progressively. This design is useful for sheet metal and thin material applications where multiple hole sizes are needed without switching bits, improving efficiency in fabrication work.

M35 cobalt bits are more heat- and wear-resistant than standard HSS bits but still benefit from proper lubrication and cutting speeds during use. Avoid excessive heat buildup, use cutting fluid on tough metals, and store bits properly to prevent chipping and maintain sharp, precise edges over time.