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1-
Identify the application's requirements for torque, misalignment,
and service factor.
2-
First select a coupling based on these requirements using
the Dimensions/Performance
Charts for Clamp Style
or the Dimensions/Performance
Charts for Bolted Style.
3-
Find the selected coupling's maximum rated torque and misalignment.
Compute the misalignment ratio by dividing the required
parallel misalignment by the maximum rated parallel misalignment.
4.
If either angular or axial misalignment are required, multiply
the existing misalignment ratio by 1.2. If both angular
and axial misalignment are required, multiply the misalignment
ratio by 1.4.
5-
Compute the torque ratio by dividing the required torque
including service factor by the maximum rated peak torque
of the selected coupling:
Torque
Ratio = (Required Torque x Service Factor)/Rated Peak Torque
The
actual running torque should never exceed the maximum continuous
rated torque. Occasional torque spikes in the system should
never exceed the maximum peak torque rating.
6-
Now that the torque and misalignment ratios are known, their
effect on the coupling can be compared to the couplings
operating envelope shown on the right.
If
the lines representing the two performance ratios meet to
the left of the shaded area, the selected coupling is appropriate
for the application. If the lines meet in the shaded area,
the selected coupling is not appropriate for the application,
and a larger coupling size must be selected.
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