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Chains and Rollers
The main designation of a feeder are the heavy duty chains
and rollers which are attached to the main frame. The chains
and rollers vary in size depending on the application and
stresses they will be put under. Chains and rollers are manufactured
by caterpillar and designated as D4, D7, D9 and D11 chain
and rollers, the higher the 'D' number the greater the intensity
of the work load. Subsequently a feeder is initially categorised
as D4, D7, D9 or D11 plate feeder. |
|  Plate
Width
The Apron Plates which are fixed to the chain are made from
especially rolled sections and are manufactured in various
widths, to cater for the maximum volume of material which
may need to be processed. Standard widths available are 1500,
2000, 3000 and 4000mm.
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 Feeder
Length
The feeder length is measured from the centre-line of the tail
sprocket to the centre-line of the head sprocket. This is a
distance of how far material needs to travel to reach the designated
point from the loading area. |
Drive
The drive located at the head sprocket is generally a variable
speed unit as it is often the main method of controlling the
throughput of the plant. There are two types of variable speed
drive available, electromechanical and hydraulic, depending
on the source of energy. |
 Fines
Retrieval System
An optional extra is the fines
retrieval system, which is positioned underneath the feeder
to prevent fine material from spilling underneath the feeder.
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