As with all mechanical devices, regular inspection
FOR wear and strict adherence to use instruction is necessary to
prevent misuse failure.
Regardless of the 5:1 safety factor on hoist
rings, NEVER EXCEED THE RATED CAPACITY. This safety margin
is needed in case of misuse, which could drastically lower load
capacity.
Make sure the hoist ring pivots and rotates
in all directions freely.
Tighten mounting screws to torque recommended.
Periodically check torque because screws could loosen in extended
service.
Do not apply shock loads. Always lift gradually.
Repeat magnaflux testing if shock loading ever occurs.
Tensile strength of parent material
should be above 80,000 PSI to achieve full load rating. For weaker
material, consider through-hole mounting with a nut and washer
on the other side.
Important: The load on each hoist ring is not simply
total weight divided by the number of hoist rings. The resultant
force can be significantly greater at shallow lift angles
and unevenly distributed loads. See the example.