The bushing has a groove turned on the O.D. and 4, 1/8 holes drilled to let the oil be pumped inside (B).
The sleeve (E) has a fitting tapped into the outside so the high-pressure hose can be screwed on.
There is also a retaining sleeve (F) to hold (E) in place. The sleeve (E) is free to rotate when the lathe is
turning.
All of the parts when completed are heat treated and drawn at 500 degrees. This will just about
complete the setup for drilling and reaming.
Except for one other item, you will want to mount a high-pressure oil gauge in the line to the Drill and
Reamer fittings. Have this handy so you will be able to see it always. Oil pressure will tell you quite a bit
what is going on inside a barrel. If a Drill or Reamer is plugging up the pressure will go up. For
information on carbide tips, write the Metallurgical Products Dept, General Electric Co, Detroit,
Michigan.