long holes Italy

... Our drill bits for tire mold cleaning are high speed steel cobalt (Hss/Co) and have undergone a special heating process that makes them specifically suitable for the drilling and cleaning of vent holes in both steel and aluminium tire molds. Diameter range: 0.4 mm – 3.0 mm (for side walls drilling and agro tire molds); Helix range: 10 mm – 350 mm (tire mold deep drilling); Length range: 40 mm – 400 mm (extra long drills); Standard or Parabolic helix geometry. ...

... diffusion method. Draw a line parallel to the outside kerb or to the internal floor, at about 10-15 cm from the same. Prepare drilling points at 12 cm distance from one another on the line. The inclination of the holes should be about 20° down. The depth of the holes should be approximately 4/5 the thickness of the wall to inject. The tip of the drill should be slightly greater than 26 mm. Once the...