Cliff wrote:

Perhaps a bit related ....

When the belt wants to wander no matter what
(happens a bit on some belt snders, as an example)
I found that you can build up a crown with a few turns
of "fiberglass" shipping tape.
It seems to last about forever but may need to be
removed for a new belt.

Might be easier to build up a "crown" (as needed) with something
(a polyurethane based tape might last forever) than to
try to machine it in the first place (& get it right).


The end user can probably get away with a stopgap solution like this,
but the fabricator can't. That one in a million chance that some idiot
gets caught in a "tape" that unravelled is too big a risk. All it takes
is for some maintenance guy to reverse a pulley and any tape-like
substance (glued well or not) will unwind over time. There are cases of
glued on urethane sheets that were pre-crowned while flat that have
worked though.

When you can get sued (and lose) because someone else was stupid/
removed guards/ ignored warning label with idiot symbols, etc., it's
best not to vary from industry standards of construction.

Koz