Drills with central coolant bore holes
 
With passage bores holes
With blind-end bore holes
With stepped bore holes
 
 
  Drill blanks with Y-shaped coolant outlets
 
Coolant output on the blades
Coolant outlet on the chip cavities
 
 
Drill blanks with prallel colling ducts
 
 
Any arc can be produced
Bore hole diameter can be freely selected
With blind-end bore holes and Y-shaped outlet
 
 
Drill blanks with spiralised cooling ducts
 
Bore hole diameter can be freely selected
Any arc can be produced