Measuring Tire Uniformity 650522

Tire uniformity measurements may be interpreted with some reservations to provide information regarding automobile ride disturbances at frequencies less than 60 cps (tire shake and roughness) and one type of handling disturbance (tire pull).
A list of precautions and recommendations based on present or potential tire specifications is given in the first part of this paper, along with some machine and tire variables influencing numerical force variation values. In the second part, the waveforms of four uniformity measurements, radial force-variation, lateral force-variation, loaded radial runout, and free radial runout, are compared with the sites of splices in tires and substantial agreement is shown. Are-port on the capabilities and limitation of present day radial and lateral force-variance measuring as shown by the statistical analysis of a series of repeat measurements on two typical lots of passenger tires is given in the third part.


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