It is common with industrial belt drive applications to
implement a tensioning idler. This can either be in situations where there are
multiple components being driven, space constraints, or if shaft locations are
at fixed positions. Either method is acceptable but there are situations where
one may be preferred over the other. When dealing with synchronous belt systems
it is typically unnecessary to use a spring tensioner. A spring tensioner in
certain situations can over-complicate the design and possibly cause more
issues. Once a synchronous drive is installed
and tensioned correctly the system will not need re-tensioned. For this reason a fixed idler bracket would be
more than acceptable.
On systems where V-belts have been installed or space
constraints are an issue then a spring tensioner may be the preferred option. The physical properties of a V-belt will cause
it to naturally stretch over time throughout its operating life. If the drive is
also located in an area where it’s difficult to re-tension the system manually
a spring tensioner could then be used. This will allow the system to continuously
operate at the correct tension as the V-belt stretches, leading to reduced intervals
for preventive maintenance.
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