DIN1897 HSS Twist Drill Bits for Metal Applications

Manufactured from high-speed steel grades HSS4341, M2, and M35, they deliver a consistent hardness of HRC 62–65. The M35 variant incorporates 5% cobalt, significantly elevating red hardness and wear resistance, while the M2 grade offers an optimal balance of cost and cutting performance. A comprehensive heat treatment—quenching followed by multiple tempering—ensures uniform hardness across the entire tool, merging sharpness with toughness.   Precision Geometry for Clean Cutting: Each bit features a standard 118° point angle (with an optional 135° split point for harder materials), complemented by a 30° helix angle and an 8° relief angle. The cutting edges are precision-ground and honed to minimize cutting forces, ensuring burr-free holes and preventing walking during start. The web is thinned to reduce axial thrust and enhance centering accuracy.   Extended Sharpness & Red Hardness: On common materials such as mild steel, aluminum, copper, plastics, and wood, these bits sustain…

Bi-metal Hole Saw