The distance between the terminal pulley and the adjacent fully troughed idler set at either the head or tail end of the conveyor is known as the transition distance. Transitions occur wherever a belt changes at a terminal pulley from a flat shape to a trough shape, or vice versa. It is important that these transition distances should be sufficient to prevent the belt edges, and the resultant pressure forcing the belt towards the idler roller intersections, becoming excessive. At the area of change, the transition must occur over sufficient conveyor length in order to avoid excessive tension in the belt edges at a terminal pulley where the belt operating tension is high. At a low tension terminal, excessive edge tension will rarely be encountered, but here sufficient transition distance must be provided to keep the belt tension at the bottom of the trough great enough to avoid buckling and subsequent problems. Minimum transition distances are affected by belt tension at the point of transition, trough angle and the level of terminal pulley in relation to the last full-troughing idler.

Neelkanth steel Cord Beltings will operate satisfactorily with a take-up travel as small as 0.25% of the conveyor center distance. To allow this absolute minimum, which will accommodate 0.05% permanent stretch plus 0.15% elastic elongation plus 0.05% thermal Expansion and contraction, careful attention must be given to belt slack during installation, take-up pulley positioning, and starting and stopping conditions. This minimum may allow no provisions for re-splicing, if the belt should be accidentally damaged. To avoid this possibility, we recommend these allowances: Take-ups should be automatic, either counter weighted or wench operated.
When the conveyor center distance is very long, the total take-up travel requirement may be split between two separate take-ups, one automatic and one static.
NOTE: Data provided in this website is indicative only & specifications may be changed by the company due to continuous and ongoing developments in our products.