"Joe AutoDrill" wrote:

Here is an inquiry I received this morning:

*** START ***

I am trying to find some sources to help us build a wood boring
machine that can drill from 4" up to 10" (rarely larger), mostly our
needs call for the 4" ~ 8" diameter range boring up the center of
the log lengthwise. Length of the pole is typically 8' to 12' long.
We are trying to find a source for the machine and drill bits.

National carbon used a "gun lathe" to machine 6" dia thru holes in 20
ft long graphite logs for the nuclear industry.

They found both the lathe and a milling machine at an old armory
auction as I remember it. (This was 1960 era).

Lew