Optibelt ZRP - Page 48

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5 Design Hints, Dimensions and Tolerances
5.3 Operating, safety and maintenance hints, installation
Figure 5.4: Correct and incorrect installation
Correct tension
Vertical angular deviation of shaft axes
Timing belts as sets
Timing belts which run in pairs or side-by-side MUST be ordered as
a set. This ensures that all the timing belts are cut side-by-side from
the same production sleeve and that their lengths are identical.
Timing belts which run side-by-side on one pulley should be
protected from lateral overrun by a dividing ring.
Maintenance and inspection
Drive systems fitted with Optibelt ZRM/ZRP/ZRL timing belts are
maintenance-free. Nevertheless, visual inspection of the timing
belts, the pulleys and any idlers used, should be carried out
regularly for early detection and rectification of possible mal-
functions (see Table 5.14, page 52).
Belt fitted with the use of force
Kinked belt
Horizontal angular deviation of shaft axes
Axial misalignment of pulleys
Aligned pulleys on axially parallel shafts
Insufficient belt tension
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