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Gravity Conveyor

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The gravity conveyor is one of the most inexpensive methods of conveying material. Requiring no powered drive source, they are designed to transfer materials by gravity, in straight or curved paths with little or no manual assistance. The major types of gravity conveyors are listed below:

Chute Conveyors are often used to link two powered conveyor lines, provide accumulation in shipping areas, and convey items between floors with a minimum amount of space required (spiral chute conveyor). Items are directly in contact with the steel or aluminum chute, and no wheels or rollers are necessary for motion. In general, a slope of 20 to 30 degrees is required to slide a package weighing 30 to 50 pounds down a straight chute less then 12 feet long. A greater slope may be needed in very humid environments, and special considerations are required for spiral chutes or chutes with curved sections. While chute conveyors are economical, it is also difficult to control the items being conveyed; packages may tend to shift and turn so that jams and blockages occur.

Roller Conveyors, when used without a power source, fall under the category of gravity conveyors. Motion is achieved by inclining the roller section, which in turn transports the items along the individual rollers.

Skate Wheel Conveyors, or wheel conveyors, are similar to the roller conveyor in design and function; a series of skate wheels are mounted on a shaft. Spacing of the wheels is dependent on the load being transported. Although wheel conveyors are generally more economical than the roller conveyor, they are limited to light-duty applications.
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