Regular Spools float
on a lineshaft (line shaft) and function as clutches that will slip
when boxes jam or accumulate, thus preventing belts from abrading.
They also provide a safer working environment, allowing rollers
to stop if hair or hands get caught in rollers. Spools come in two sizes:
How to prevent c-clips from slipping: If spools are allowed to "float" on the shaft, they will screw themselves downstream as soon as the shaft starts turning. This will cause the belts to stretch and rub against the outside edges of the spool flanges. Since the edges are moving faster than the belts, the belts will abrade. To prevent such belt wear, the center of the spool must be held directly under the center of the roller groove. Normally, a single c-clip on each side of the spool will hold it in position. However, under certain circumstances, c-clips may slip, allowing spools to screw down the shaft and cause premature belt wear. This may happen when:
You can prevent c-clips from slipping by placing two c-clips on each side of the spools. Actually, if the conveyor always moves in the same direction, c-clips are not needed on the upstream side because spools do not screw upstream.
Or select a drawing below to view it
Under certain circumstances
For the best in lineshaft spools, split spools, line shaft collars, snap-rings and c-clips, insist on Dura-Belt.