"Bob La Londe" wrote in message On 6/11/2019 6:49 PM,
Jim Wilkins wrote:
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?




I remember something like that being done for an air
metering screw on a PCP air rifle. First set screw
obstructs the passage, and the second one backs it up and
locks it in place.

It takes two screws in the thread to obstruct passage. They
push against each other so both sides of the groove are
sealed. Plus, the screws lock each other in place even if
the inner one is not in contact with something. phil k.