Wheel Conveyors

Wheel conveyor
Wheel conveyor

The most common wheel conveyors are basically similar to unpowered roller conveyors but incorporate wheels mounted on shafts rather than rollers. Wheels may be steel or plastic, with ball, roller or plain bearings.

As they can be set in a staggered pattern, wheels form a closer configuration than rollers, reducing the need for flat undersides on the goods transported. Wheel conveyors can thus be used for smaller and more irregular items than roller conveyors.

This type of wheel conveyor is suitably mainly for lightweight items (less than 50kg) such as card board boxes and bins of various kinds with fairly even bottoms. However, wheel conveyors cannot stand point loads as well as roller conveyors because rollers distribute loads more satisfactorily. Wheel conveyors are mostly un-powered and function as gravity lines, with the items weight determining travel speed.

Applications basically coincide with those described for un-powered roller conveyors, except that wheel conveyors are applicable for lightweight goods only.

Roller Conveyors

roller conveyor
Roller conveyor

Roller Conveyors are line restricted devices and consist of rollers mounted between two side members. Bearings are usually incorporated in the rollers to cut down on mechanical losses.

Roller conveyors are among the most commonly used forms of line restricted internal transport. They can be used for many different types of goods, from small cardboard boxes up to pallet loads and even larder items. Goods must have flat bases or be fitted with skids in the direction of the movement. Drums and tins with seamed bottoms can also be conveyed if the conveyor is equipped with guide rims. However, roller conveyors are less suitable for moving easily deformed goods.

As a rule, roller conveyors function best if the underside of the foods they transport is firm.

Belt Conveyors

Belt conveyor
Belt conveyor

A Belt conveyor consists of an endless belt passing over rollers and forming a continuous moving surface which supports goods.

Belt conveyors differ from roller and wheel conveyors in that the carrying surface (belt or slats) accompanies the goods. Thus, in most instances these conveyors exist as powered units only.

Belt conveyors mainly handle bulk goods and to a less extent, comparatively lightweight items. Capacity is comparatively high (high speeds are attainable) and many types of goods and packages (bags, small parcels, cardboard boxes, sacks, wooden boxes) can be handled. Belt conveyors handle goods gently and have the considerable advantage of being able to manage inclines of at least 15º-20º. Tread patterns and flights, which increase friction, permit inclines up to 40º.