RUKO Twist Drill DIN 338 Type N HSS-R 4.0mm

The RUKO 4.0mm twist drill bit is manufactured from heavy-duty high-speed steel and engineered to meet DIN 338 Type N specifications. Utilizing a split point design and a helical point normal ground tip with a 118-degree point angle, this fully ground drill bit ensures precise concentricity while requiring minimal pressure during operation. The right-hand cutting bit features a standard cylindrical shaft, a normal groove profile, and a spiral angle ranging between 25 and 30 degrees. It offers a total length of 75.0mm, a flute length of 43.0mm, and a maximum drilling depth of five times its diameter. Finished with a black surface coating and conforming to an h8 dimensional tolerance, it is optimized for drilling into materials including aluminum, plastics, and steel rated up to 900 N/mm.