I don’t know about ‘rebuild kits’ for Gorbet frames, which I think
are excellent. I know the newer ones have a steel knurled head to
tighten the screw.
I believe they can be purchased to replace the old plastic leaver
type. However here are two suggestions which I have had to use to
overcome blade slippage problems: 1. remove tightening screw and
clean out the blade hole.
- drill out a 1.5mm diagonal (downward pointing) hole through the
handle end aluminium holder to meet the blade hole so that metal
sawdust etc. does not fill it up.
ALSO make sure there are no bits of broken saw blade on the back
screw plate against which the blade is pinched by the screw.
While on the subject of the use of piercing saws. I have two, one
for normal saw piercing and the other with the blade inserted so the
teeth face forward so you cut on the push against the bench pin!!!
Sacrilege. It is excellent for cutting jumprings, chainmaking, also
ringsizing. Adjust the blade size to the wire diameter. Try it.