GUNSMITHING AND TOOL MAKING BIBLE

(Tuis.) #1

REAMING DRILLED BARRELS


Change the feed on the lathe to the proper feed. Usually start a little slow and increase it to where you
are getting a good job and yet not plugging up. Sometimes if you have too fast a feed, you will have
trouble with the reamer plugging up.


Remove the starter bushing and the chip box. Install the reamer adapter to the barrel blank, and tighten
the setscrew. Connect the oil line to the fitting on the reamer adapter. On your reamer pull rod; unscrew
the driver from the end of the rod. Now slip the rod into the barrel, all the way through the barrel, and out
the bushing on the reamer adapter.


Screw the driver back on the rod and slip into the driver holder on the lathe carriage, and tighten
setscrews. Replace the shields on the end of the lathe. Be very sure it is on good as there will be a lot of
oil coming from the barrel in reaming. You should now be ready to start. The first reamer is the rough
reamer, its purpose is to remove the excess metal from the bore, and smooth and true up the bore.


The finish reamer doesn't remove much; it takes the bore to size, and gives the mirror finish to the bore.
Double check to see if the oil pressure valve is opened all the way. Double check the hoses to be sure
they are tight, and turn on the oil. Let it run for a few minutes and turn the pressure up to about 300 lbs.
The pounds of pressure are not important as the amount of oil coming from the end of the barrel.


It has to be shooting out under enough pressure to get rid of the chips so they won't plug up the reamer.
If it plugs up it could ruin the barrel, and probably break the reamer. Start up the lath in back gear. Make
sure that the pilot of the reamer is inside the barrel, and engage the feed lever. As the reamer is starting
to feed into the barrel, it may cut a little rough but it should straighten out soon.


It will, if sharpened right and start cutting smooth from the start, or after it is in the barrel about 1 inch.

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