Fully Ground HSS Co Twist Drill Bit

Technical Data

1. Material & Hardness: Made of HSS Co (M35/M42, 5-8% cobalt), hardness 65-69HRC, retains strength at 600-650°C.
2. Dimensions & Structure: Diameter 1-20mm, straight/reduced shank, 118°/135° split point, 2 spiral flutes, fully ground finish.
3. Standards: Complies with DIN 338/DIN 340, right-hand cutting, optional black oxide/amber coating.

Advantages

1. Cobalt enhances heat/wear resistance, outperforming ordinary HSS for hard metals.
2. Fully ground edges ensure precision drilling with clean holes and no burrs.
3. 135° split point self-centers, avoiding deviation; spiral flutes enable efficient chip evacuation.
4. High toughness, less prone to breaking during high-torque drilling.

Areas of Application

1. Hard metals: Stainless steel, hardened steel, alloy steel, titanium alloy.
2. General metals: Carbon steel, cast iron, aluminum, copper.
3. Industrial scenarios: CNC machining, machinery repair, auto parts production.
4. Versatile use: Also suitable for plastics/composites, fitting professional workshops and heavy-duty drilling tasks.