Maintenance
Created by EBCCW 00:06
15
5815EN-03
3.6.2 Checking the tension of conveyor chain
The chain is made of elastic material. The chain eventually stretches as the
material creeps. The extent of the stretch depends on the traction force in
the chain. The stretch shows itself as slack on the return side of the drive
unit.
The tension of the conveyor chain should be checked after 50, 250, 500
hours of operation and thereafter every 500 hours.
In operation there will be some slack in the conveyor chain. How much ac-
ceptable slack depends on the length of the conveyor chain. The most suit-
able places to check the slack in the chain are at intermediate or end drive
units.
3.6.3 Important
The chain should therefore be pre-
tensioned while the conveyor is
stationary, but must never be so tight
that there is no slack during operation.
There should be no appreciable slack
on the chain when the conveyor is
stationary. This can, however, vary
depending on the total length of the
chain. If there is too much slack, there
will be excessive wear on the chain
guides and the chain. This could be a
risk for injury.
If the slack on the conveyor chain is
unacceptably high, it must be
shortened by splitting the chain and
removing the necessary number of
links. See
Shortening conveyor chains
on page 16.
If the conveyor has a guided drive unit
with no chain slack outlet, the
elongation of the chain has to be
monitored even more carefully, to
ensure trouble free operation
The Conveyor chain must show some
slack during operation
The Conveyor chain does not need to
show any slack when the conveyor chain
is stationary
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