GLOSSARY 75
6. Glossary
Amplitude (Magnitude)
The amount of force or the intensity of the vibration.
AutoClamp
Pneumatically-powered automatic wheel clamping
device.
Back Coning
When the wheel requires the cone to center the wheel on
the balancer’s shaft from the backside, primarily due to
the chamfer of the wheel. Also referred to as Back-Cone
Mounting.
Backspacing
The distance measured from the mounting face to the
back edge of the wheel.
BDC
The abbreviation for bottom dead center also referred to
as 6 o’clock.
Bead seating
The process of seating the tire to the rim bead seats.
Bead seating preferably occurs just after the tire and
rim have been assembled, but may gradually change
and optimize over a longer period. If loaded with the
SmartWeight Touch® load roller or driven, the position
of the bead may optimize or always remain seated
improperly, unless the tire is demounted, lubricated, and
remounted. However, the load force and its’ relatively
short duration will not necessarily solve defective
mounting of the tire bead seat to the rim seat.
Blinding and Rounding
Blinding is a set amount if imbalance required before an
indication of imbalance is displayed. Rounding sets the
weight increments to specific amounts, such as tenths, or
quarters, etc.
Bolt Pattern Circle
The diameter of an imaginary circle drawn through the
center of each lughole, and virtually always on the same
centerline as the hub bore of the wheel.
CenteringCheck
Hunter feature that ensures the wheel is properly
centered when mounted on the balancer.
Couple Balance
A procedure that corrects the imbalance in radial
movement.
Dataset®
The inner and outer electronic arms on the SmartWeight
Touch® GSP9700. By positioning the Dataset arms and
entering data using the foot pedal, rim dimensions can be
recorded for balancing.
Dynamic Balance
A procedure that balances the wheel assembly by
applying correction weights in two planes so that up
and down imbalance and side-to-side imbalance are
eliminated.
eCal™
A method automatically adjusting balancer transducer
calibration.
Force Matching™
A method of aligning the high spot of the tire’s radial
force variation with the low spot of rim runout to decrease
rolling vibration in the wheel assembly.
Forced Vibration
Vibrates when energy is applied.
Free Vibration
Continues to vibrate after the outside energy stops.
Frequency
The number of disturbances that occur per unit of time.
Front Coning
When the wheel requires the cone to center the wheel
on the balancer’s shaft from the front. Also referred to as
Front-Cone Mounting.
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