Order
The number of disturbances per cycle (rotation). For example, a 1st order vibration
occurs once per cycle, and a 2nd order vibration occurs twice per cycle.
P, P/SUV, LT
“P Tires” refers to passenger tires, “LT Tires” refers to light truck tires, and “P/SUV Tires”
refers to P-Rated sport utility vehicle tires.
Phase
The position of a vibration cycle relative to another vibration cycle in the same time
reference.
Phasing
The cycle pattern of two or more vibrations that overlap and combine to increase the
overall magnitude.
Pressure Ring
The accessory used to prevent the wing nut from contacting the wheel when on the
balancer shaft.
Quick-Thread
®
Motor assisted threading of the wing nut for quick installation and removal.
Radial Force Variation (RFV)
A term describing a measurement of the tire uniformity, under load, measuring the
variation of the load acting toward the tire center.
Radial Runout
A condition where the tire and wheel assembly is slightly out of round forcing the spindle
to move up and down as the vehicle rolls along a smooth surface.
Reed Tachometer
A mechanical device that uses reeds to indicate the frequency and magnitude of the
vibration.
Resonance
The point where a vibrating component’s frequency matches the natural frequency of
another component.
Responding Component
The noticeable component that is vibrating.
Road Force
A change in the force between the wheel and the axle while rotating under a load.
Discrepancy in road force can cause a vibration although the tire and rim may be
perfectly round and the tire is balanced.
Road Force
Measurement
A measurement of the wheel assembly as would be found from an actual road test of a
vehicle. The GSP9200 is equipped with a load roller to take the Road Force¥
Measurement. The load roller places up to 1400 pounds of force on the spinning tire, and
automatically measures the effects of loaded runout and tire stiffness to emulate
tire/wheel assembly force variation.
GSP9200 Series Wheel Balancer Operation Instructions 7. Glossary
73
To Next Page
Loading...