TOOLS FOR REAMING
You will have to make a few additional fixtures for the reaming operation now. This will not have to be
much of a job, as everything that you have done so far will work with the reaming operation. About the
only thing that will be needed is a reaming adapter for the chip box housing. When this adapter is done
it will fit in place where the chip box housing was.
The high-pressure oil line that was fitted to the drill driver on the Deep Hole Drill will now be fitted to the
reaming adapter. The reamer rod will have to be made. Cut it now to correct length. A drill driver will
need to be made to fit the reamer rod. This is the same size as the deep hole drill driver.
REAMING FEED
With this done and in place you will have to change the feed of your lathe to a faster feed, somewhere in
the range of .015 to .004 inch feed PER FLUTE PER REVOLUTION. The speed of the lathe will have to
be changed to the back gear for slow RPM. In reaming, the reamer is pulled through the barrel.
REAMER ADAPTER
Now for the construction of the reamer adapter. First, you will need a short bar of steel 1 1/2 inch in
diameter if you are using 1 1/8-inch steel for your barrel blanks. This piece when completed should be 7
to 8 inches long. The end that fits over the barrel blank should be a very close fit to the barrel, just a few
thousands larger. Next cut an "O" Ring groove to fit an "O" ring, this is used to seal the oil from leaking.
The bore (B) should be bored to .755 to fit the reamer guide (C). This guide should be made out of tool
steel. The fit over the reamer rod should be very close, as this is what seals the oil. I have in the past
tried to use "O" rings to seal the oil but they do not last long. Drill Rod size .750 works very well, as there
is no turning of the outside to fit the sleeve (A).
Another way to do this is to bore (D) to 1/2 inch and make a harden bushing to fit inside it, so the
bushing can be changed to the different size rods. When the bushing wears out, it can be easily
changed, without the expense of the higher priced 3/4 inch Tool Steel. The bushing bearing (E) is a very
close fit in the bushing.