November 2013
CONSTRUCTION WORLD
45
JVT Vibrating Equipment’s managing director, Fanie
Swart warns users of the risks associated with
fitting non-OEMparts, particularly drives and drive
components to vibrating screens and feeders.
equipment
DISCUSSING THE SUPPLY
of drive and drive motors for vibrating
equipment, Swart points out that it is critically important to the efficient
operatingof screens and feeders that original equipmentmanufacturer
components are installed.
Vibrating Equipment is carefully and systematically designed to
perform to stringent specifications to ensure high efficiencies and
robustness are met, specific to the application they are required for.
“Screen drive beams are designed for a particular drive type and
model,”says Swart. “During design, consideration is given not only to
the centrifugal force exerted, but also more importantly to the loca-
tion where this centrifugal force will be transmitted into the beam.
Each manufacturer’s designs have different physical dimensions.
A non-OEM drive would typically require an adaptor plate to be fitted
in order for it to align correctly to the beam. However, these typically
have a different footprint to the original equipment”, he states. “The
result is that the centrifugal force will not transmit to the drive beam
as per original design”.
He goes on to point out that this in turn means that the bolts on
the adaptor andmotor fasteners will be unduly loadedwith additional
moment, resulting in excessive stress to the bolts and drive beam.
“Another consideration,” Swart says, “is that when the centrifu-
gal force is applied to a position different to that of the design, the
efficiency of transferring the centrifugal force may be compromised.
The position of the drive and the adaptor plate must be taken into
consideration, as well as the additional weight of the adaptor plate.
If not, it could result in more force required to achieve the desired
result, which in turn could induce higher stresses into the already
compromised drive beam design.
Further, one needs to keep in mind that original equipment
manufacturers have the back-up, support and design infrastructure
to ensure fast, efficient problem solving, whereas, non-OEM manu-
facturers should be held accountable for retrofit parts they supply
that ultimately affect the performance and efficiency of the vibrating
equipment they are being fitted to.
The benefits to end users in ensuring that they are dealingwith the
right supplier for the right equipment and parts goes beyond that of
service and supply. JVT Vibrating Technology is able to reassure users
of continued support and supply of OEMparts as it has access to state-
of-the-art facilities and inter-groupdesign&manufacturing experience
approaching one hundred years. Further JVT is the exclusive African
party that is licenced to supply Joest drive systems, exciters, unbal-
anced motors, dosing drives and many other components including
all OEM spares.
JÖST Germany and Joest
relationship ended early 2012.
Subsequently, the leading mul-
tinational original equipment
manufacturer has elected to
re-establish a stronger foot
holding within Southern Africa
through the establishment of
JVT Vibrating Equipment. JÖST
Germany is ISO accredited,
meeting all QCP and work stan-
dard requirements to interna-
tional requirements.
●
Non-OEM
vibrating motors
