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A detailed buying guide: how to choose a metal drill bit.
Metal drill bits drill steel, stainless steel, cast iron, aluminium, copper and plastic. This section has HSS, HSS-Co (cobalt) and HSS-TiN bits, step drills and centre drills.
HSS is universal for mild steel, while HSS-Co (M35, M42) is needed for stainless and hard steels.
TiN (gold) coating reduces friction and extends life.
Standard length is DIN 338, while long bits (DIN 340) are for deep holes. Read how to choose drill-bit diameter and length.
The larger the diameter, the lower the speed; drill steel with oil or coolant.
Clamp sheet metal in a vice so it does not spin when the bit breaks through. Read how to use a drill safely.
Sharpen dull bits to a 118-135° point or replace them.
At ToolsArmenia you can choose metal drill bits by steel grade, coating, diameter and length.
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