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Many folder makers use domed pins on their knives. These are
easy to make and to fit.
Drill a hole the size of the wire used for pins through a
piece of 10mm thick steel. Cut lengths of annealed wire about 4mm longer
than the thickness of the plate and grind the ends flat using a 180 grit
belt, or flatten them on a disk grinder.
Place the plate with the wire on an anvil or on a steel
support. With a small ball peen hammer, peen the pin head with light blows,
work along the edge of the pin using lots of light taps. The pin head should
start to mushroom.
Place the plate with the pin on your drill press table, with a
head spinner in the chuck. The bottom end of the wire should protrude into a
hole on your drill press table.
With the drill set at high speed and with a drop of oil on the wire end, spin
the wire head until it is nicely rounded.
My head spinner is a piece of 4mm mild steel rod with a hollow
on one end. I made the hollow by grinding a small divot with a ball grinder,
then polishing it up with a ball shaped diamond burr held in my hand while the
spinner in the chuck.
The pin ready for fitting to the knife.
Mark the position of the pins on the covers and drill the
holes. Chamfer the edges of the holes on the liner side. Place the pins in
position and trim the excess wire on the liner side.
Use another head spinner, clamped in your vise, to support
the pin head when you peen the pin on the liner side. (This means that you
must make two spinners, use the one in your drill press, and the other as
support.)
This page last edited on
Friday, 16 September 2011
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