"Jim Wilkins" wrote in message My home made sawmill
uses L095 Lovejoy couplers to connect the engine
to the transmission, and their set screws loosen unless I
pull very hard on a long hex wrench. The cause may be the
large inertia of the bandsaw wheels, which are from a
motorcycle. When the vee-belt-tightening drive clutch is
loose the belt slips freely over the pulleys, but when
stopping the belt still grabs enough to spin the engine
after it's shut off. Thus the couplers see torque in both
directions.

This suggests that adding a second set screw to lock the
first does help.
https://www.hobby-machinist.com/thre...-screws.36903/

What's your experience?



When one set screw is used it is in contact with one
side of the thread groove and any motion will loosen
it. When a second screw is used the inner one will
be pushed to the other side of the v-groove and now
both screws are always in contact with the groove
but on opposite sides of it eliminating motion to
loosen them. Should work... phil