1 wheel balance theory balance - unbalance what does it mean?
Post on 14-Dec-2015
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Balance....by definition
The stability resulting from the equalization of opposing forces.
Equal Force
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What is Static Balance?
Static Balance is when the weight of the wheel and tire assembly is distributed equally around the axis of the wheel rotation.
If static Balance exists the wheel will have no tendency to rotate. If rotated it rotates with
Equal Force
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...and, if this wheel is in static balance?
If this wheel is in perfect balance at a speed of 40 mph, will it remain in balance at all
speeds?
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The answer: yes, BUT... can you Prove it?
At 20 mph .25 oz of imbalance generates .86 pounds of force
.86 lbs
.86 lbs
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At 70 mph the force is 10.53 pounds
It's still in perfect balance!
10.53 lbs
10.53NOTE: Speed rated Tires Utilize a Nylon Over-lay to prevent tire distortion at high speeds.
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One common problem:
Improper use of equipmentMounting Method
Clean Mounting Surface
Calibration
Careless Weight Placement
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Consider this...
1.12 oz. Imbalance
Most Computer Wheel Balancers Round off to the nearest .25 oz.
1 oz. Balance Weight
Is this a Problem?
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Tire & Wheel Frequency Change with Speed
Vehicle Speed Increasing
Tire imbalance frequency increasing
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...and, the complaint...
"...but, I balanced the tires in the FINE/NON-ROUND-OFF mode and...
...it still vibrates at 55 M.P.H.
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What's the Problem?
Mounting Error
Are wheels centered by the center hole?Hub-centric
Are wheels centered by the lug nuts... or...Lug-centric
Duplicate O.E.M. Mounting
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...also, Consider this
Are Tires and Wheels Perfectly Round?Tire High Spot
Wheel High Spot
Would this Mismatch cause a problem?
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