Threaded Drill Bit

 Threaded Drill Bit 
                        Bit skirt:normal and retrac
                        Bit diameter: 33mm to 203mm
                        Bit face: flat, concave, convex and drop-center

                        Bit type: cross type, X type and spherical / ballistic / parabolic button bit
                        Bit thread: R22/25/28/32/38, SR28/32/35, T38/45/51, GT60, ST58/68
                       Quality aircraft alloy steel and tungsten carbide, optimum design, state of
                        art manufacturing, multiple precise heat-treatment.
                       Highest penetration rate, maximum wear resistance, longest lifespan and
                       outstanding performance  in roughest working conditions.


  • Winner Industry Corporation Ltd
  • E-mail:
  • Tel: +86 731 8281 5126
  • Fax: +86 731 8281 5128
  • Add: No. 263 Shao Shan North Road,
  • Changsha, Hunan, China

  • Copyright 2015 Winner
  • Winner Industry Corporation Ltd