I have an old procunier tapping head that I got because someone forgot
to oil it. That was about twenty years ago. I repaired it and it ran
fine until about 10 years ago when the cork clutch lining broke loose
from the aluminum center piece. 5 minute epoxy worked to put it back
together. Today it broke loose again. The procunier web site sells a
new clutch assembly for 58 bucks. I just re-glued the cork back on the
center piece. Bet it lasts another 10 years.
ERS