Reduce Scrapping and Smelting, Promote Component Reuse > Complete Machines
> 1960 1980
> Cook County
> Coolant fed reamer drill 7.1MM 12.1MM countersink sharp
Coolant fed reamer drill 7.1MM 12.1MM countersink sharp
* MAIN BORE DIAMTER IS 7.1 MM
* COUNTERSINKS AT THE NEXT LEVEL TO 12.1 MM DIA
* HAS ANOTHER STEP ABOVE THAT TO REAM THE EDGES OF THE COUNTERSINK
* VERY NICE BIT COOLANT FED WITH 3 PORTS IN EACH OF THE 2 STRAIGHT FLUTES
* PORTS ARE LOCATED JUST ABOVE THE CUTTING TEETH
* NOT SURE OF THE MANUFACTURER BUT IT APPEARS TO BE EITHER A MAPAL OR STAR SU CUTTER