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Concept
Chaser bin
Summary
A chaser bin, also called grain cart, bank out wagon or (grain) auger wagon, is a trailer towed by a tractor with a built-in auger conveyor system, usually with a large capacity (from several hundred to over 1000 bushels; around is average).
The typical setup of a chaser bin is a cross auger, which feeds the folding unload auger, which in turn empties the contents into waiting Grain hopper trailers or mother bins.
In the past bins ranged in size, from 12T to 38T in most cases. Single axle bins usually can only handle a maximum of 20T of grain. These days things have certainly progressed with a Western Australia Manufacturer (Grainking PTY LTD) building their range of Single Axle Chasers starting at 20T through to 32T, handlimg this with ease. Others may find the excess weight placing undue strain on the axle, potentially causing failure, especially on rough terrain. Bins above a capacity of 20T, tend to feature a "walking beam" chassis. This chassis design features an independent axle setup, allowing the bin to smoothly travel across ditches and divets, as well as more easily access fields where the road is higher than the field level. It also allows the load to be evenly distributed along the length of the chassis, further reducing the risk of axle failure when traveling over rough terrain, particularly with a full bin.
One Western Australia Company (Grainking PTY LTD) also manufactures Tandem Axle Chasers with Suspension and Brakes Standard ranging from 32T through to 42T, and in a Tri-Axle configuration starting at 47T through to 60T.
The design of the bins usually follows the same pattern regardless of capacity, with smooth flowing curves to allow the grain to easily unload via the cross auger. This also helps prevent the grain sticking to the walls of the bin, preventing corrosion.
The cross auger is smaller than the main unload auger, which allows the unload auger to expel the grain at a constant rate. The bins can also feature cross auger cut-offs, which allow the operator to choke the feed rate to the unload auger if it starts struggling.
Official source
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