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File
Tip:
For
the bulk of filing hinges we use two files, both with safe edges.
We use a square bastard file (6 or 8 inches long) that has had one
side ground smooth. We use a fine flat file (6 inches long) that
has a safe edge or has one edge ground smooth. The safe edge is
used against the surface that is not to have material removed, generally
the barrel for the square file and the bevel for the flat.
Pins:
For
smaller hinges we use nails for pin stock, generally 16 penny box
or common. The
pins are cut to size (slightly longer than hinge barrel) after the
ends are chamfered (cut off the pointed nail end first).
We
use a hinge pin tool (made of a piece of bar stock) for heading
small pins that has a hole drilled slightly larger than the pin
diameter and just the right length for the hinge barrel. A pin that
has been heated (but still at a black heat for small pins) is placed
into the tool chamfered end first and headed with a ball peen hammer.
The pin is then knocked out of the tool.
There
are a number of other ways to head the pin (while hot in the hinge,
for example), and tools to hold pins while heading.
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