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Fig. 7
Perpendicular
To Belt Line
Belt Travel
Over “Knocked” Idler
Adjustment
Fig. 8
2˚ Maximum
Direction of Travel
Top Idler Stand
Washer
Fig. 9
Tilting the troughing idler forward (not over two degrees) in the
direction of belt travel produces a self-aligning effect. The idlers
can be tilted in this manner by shimming the rear leg of the
idler stand. Here again, this method is not satisfactory where
belts may be reversing.
The tilted troughing idler is shown in
Fig. 8.
This method has an advantage over knocking idlers in that it
will correct for movement of the belt to either side of the idler;
hence, it is useful for training erratic belts. This method has
the disadvantage of encouraging accelerated pulley cover
wear due to increased friction on the troughing rolls. It should,
therefore, be used as sparingly as possible, especially on higher-
angle idlers.
Special, self-aligning troughing idlers are available to assist
in training the belt (Fig. 9).
For a more complete discussion of
these idlers, refer to the Continental ContiTech Handbook of
Conveyor and Elevator Belting.
Typical Self-Aligning Troughing Idler
9
Installation, Maintenance & Troubleshooting Guide
Installation