Ream the hole gradually with a 2/0 taper pin
reamer until the taper pin
is centered when it is tapped in place.
Use either a drill or reamer of the correct size to match straight pins or a Number "0" taper pin
reamer if using tapered pins.
To make things easy for myself and other builders, I decided to turn my taper pin
gas block into a set screw block.
Otherwise, what I use are a 1/4" and 3/8" taper pin
available from your local hardware store; a 1/4-20 nylon machine screw; and a non-marring 1/4" punch and hammer.
On the other hand, applying too much force when hammering in the taper pin
can damage the leaking tubewall and tubesheet.
Once that first pin is out put some cutting oil on your taper pin
reamer (Brownells #080-000-674AK or Size #0 from MSC Industrial Supply.) The reamer needs to be inserted from the fat side of the hole on the right (ejection port) side.
To drive out the taper pin
you drive on the small end.
Florence was a bookkeeper for Worcester Taper Pin
Company for many years before retiring in 1974.
and Taper Pin
. He also joined the Hod Carriers-Labor Union Local 243, and worked his way to become President, then business manager for the next 30 years.