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Materials Matter: The Gear Drawing Roughness Specification

To avoid uncertainty, the complete roughness specification for the tooth flank and description of the contact stylus profilometer setup should be placed on the gear drawing.

In the January Materials Matter column, “Roughness Measurement of Precision Gear Teeth,” the importance of accurate and repeatable roughness measurement of precision gear teeth flanks was explained. However, an accurate rough measurement cannot be repeatable if it is not explicitly specified by the…


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