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HOW IT WORKS Two factors determine the accuracy and repeatability of balancing results. Centering determines mainly static
accuracy. Torque determines mainly dynamic accuracy as well as
weight placement accuracy.
CENTERING The CenTor™ adaptor works in conjunction with a
centering cone or collet. The cone, or collet, pre-centers the wheel
and takes most of the weight of the wheel. The CenTor™ Studs locate
in the lug holes and as the Wing nut is tightened the CenTor™ Studs
complete the final centering of the wheel.
The accuracy of the small holes in the plate and the corresponding
nipple on the CenTor™ Stud is therefore directly proportional to the
balancing accuracy. Vibration Solutions uses a proprietary technology
to produce the holes to an average tolerance of just ± 1.75 μm
(.000069”). The CenTor™ Stud nipple has an average tolerance of ±
2μm (0.000078”). For comparison, a human hair has a thickness of
between 100 and 150μm (0.004” to 0.006”).
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TORQUE Wheels are made of thin steel or alloy, which flex as the lug
nuts are tighten down, when the wheel is mounted on the vehicle.
It is vital to replicate this on the wheel balancer. Not doing so, will
usually cause the balancer to call for the placement of the weight in
the wrong location. The accuracy of the balancer itself has nothing to
do with this issue as no balancer can accurately pre-determine
how the wheel is mounted onto the hub/shaft.
As much as 140º weight placement in-accuracy has been verified on
light trucks when using a cone by itself. This will cause a significant
dynamic vibration, and a shaking steering wheel, when driven at
70-100km/h (45-60mph). At double that speed the vibration will be
four times stronger.
Correct and even torque is directly proportional to the length tolerance
of the CenTor™ Stud as well as the flatness of the CenTor™
Plate. One look at the front face of the CenTor™ Plate gives away our
obsession with accuracy. And the CenTor™ Studs have an average
length tolerance of just ±6μm (0.000236”). |
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