COOLANT VISCOSITY
Coolant viscosity for drill sizes 1/4 to 3/8 inch should be 80/125 Saybolt Seconds at 100 degrees.
COOLANT VOLUME REQUIREMENTS.
If you have an Army and Navy Store, there you might be able to pick up a pump there, along with other
valves, etc. Farm stores carry stock pumps that will work for some operations.
If you have 3-phase electric power, it would be wise to use a 3-phase motor of at least five horses for
the coolant pump. The pump doesn't have to be a big one as the 500 lbs. of pressure is held through a
.062 hole, and as the drill size increases, the pressure goes down.
After you have completed the plumbing, connected the electrical switch, which should be very close and
handy to where you will be standing, and all electrical connections done. You will then be ready to make
the chip box starter bushing.