DRILL INTRODUCTION

DRILL PRODUCTION TECHNICS:

  1. ROLL FORGED

  2. ROOL&POLISHED

  3. FULLY GROUND

  4. MILLED


DRILL SURFACE FINISHING:

  1. BRIGT

  2. BLACK&GOLD

  3. BLACK&BRIGHT

  4. COFFEE COLOR

  5. RAINBOW COLOR

  6. TIN COATING

  7. BLACK FINISHING

  8. ZIRCONIUM COATING


DRILL CUTTING EDGE:

  1. FAST DRILL BITS

  2. 118°OR 135°SPLIT POINT

  3. 118°GENERAL ANGLE

  4. 130°GENERAL ANGLE


DRILL REDUCING SHANK

  1. 1/4 SHANK (6.5MM)

  2. 3/8 SHANK (9.5MM)

  3. 1/2 SHANK (13.0MM)