Rotor unbalance can be defined as a condition that exists when the geometric center and the center of mass (also known as the center of gravity) do not coincide. Ninety percent or more of rotors are rigid. The critical speed is the speed at which resonance occurs by exciting its natural frequency. A good balancing process is essential for successful physical asset management.Ī rotor that operates at a rotational speed below 70 percent of its critical speed is considered to be a rigid rotor. The IOSR Journal of Mechanical and Civil Engineering states that rotor unbalance is the major cause of vibration problems. Smooth-running machines are required for producing products that meet customer specifications. Unbalance creates high vibration, which leads to other faults resulting in decreased machine life, wasted energy and reduced efficiency. Please note that the tool that you receive after placing an online order may be in a used but operable condition due to the nature of the Loan-A-Tool® program."If you want to find the secrets of the universe, think in terms of energy, frequency and vibration." ― Nikola TeslaĬould Tesla's secret be the energy wasted due to vibration at a frequency equal to shaft speed all caused by rotor unbalance?īalanced rotors are critical for achieving production and profit goals. Do not wear ties or loose clothing when working on your vehicle.įREE Loan-A-Tool® program requires returnable deposit. Should electrolyte get on your body or clothing, neutralize it immediately with a solution of baking soda and water. Always wear gloves and safety glasses and other personal protection equipment, and work in a well-ventilated area. Sulfuric acid is caustic and can burn clothing and skin or cause blindness. Use caution when working with automotive batteries. Always disconnect the negative battery cable before servicing an electrical application on the vehicle to protect its electrical circuits in the event that a wire is accidentally pierced or grounded. Always chock your wheels prior to lifting a vehicle. Refer to the service manual for specific diagnostic, repair and tool information for your particular vehicle. Information is accurate and true to the best of AutoZone’s knowledge, however, there may be omissions, errors or mistakes.īe sure to consult your owner’s manual, a repair guide, an AutoZoner at a store near you, or a licensed, professional mechanic for vehicle-specific repair information. If you continue to drive, you could notice symptoms of worn brake pads worsen when the material is at or below 2/32”.Īdvice, how-to guides, and car care information featured on and AutoZone Advice & How-To’s are presented as helpful resources for general maintenance and automotive repairs from a general perspective only and should be used at your own risk. When the remaining material is down to 3/32”, it’s time to replace your brake pads. Most brake pads are manufactured with between 8/32” and 12/32” of wear material, not including the backing plate. When the wheel has been removed, both the inner and outer brake pad thicknesses should be measured at each end to see who much material is remaining. The best way to determine if your brakes are worn out and need to be replaced is with a visual inspection. Regardless of what material your brake pads are made of, they’re eventually going to wear out.
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