Page 25 - ConveyorBeltMaintenanceManual2010

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TRANSITION DISTANCES
What is transition distance? Transition distance is the distance from the center of the head OR tail pulley to the first regular
carry side idler.
Two common types of transition distances:
1. Full Trough
Why is transition distance so important? Short transitions create:
• High Edge Tensions – Max = 115% of belt rated tension
• Low Center Tension – Min = 0 piw (avoid compression)
• Premature splice failure and idler junction failures
Confirm proper transition distance through Minuteman
®
.
2. Half Trough
23
INSTALLATION, MAINTENANCE & TROUBLESHOOTING GUIDE
i n s t a l l a t i o n
Belt edge has to travel entire idler length
Edge and center travel 1/2 as far
Half Trough – Pulley is raised 1/2 the idler height
Transition Distance
Transition Distance
Belt Edge
Belt Edge
Belt Center
Pulley Centered
Belt Center
35º
Transition Distance
Belt Edge
Belt Center
27º
20º
Pulley
Pulley
Pulley