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  • Beyond Roughness (.pdf)
    Most discussions on the quality of surface finish revolve around the measure of roughness. Indeed, roughness is the most common measure of surface finish, and parameters such as average roughness (Ra) and mean roughness depth (Rz) are the most commonly specified. But the ways to measure a surface
  • Surface Analysis: Beyond Roughness
    Most discussions on the quality of surface finish revolve around the measure of roughness. Indeed, roughness is the most common measure of surface finish, and parameters such as average roughness (Ra) and mean roughness depth (Rz) are the most commonly specified. But the ways to measure a surface
  • Surface Roughness
    Many parameters can be used to describe surface finishes and these are explained in ISO 4287 and ISO 4288. Those in most common use in the fluid power industry include: Ra, which is defined as the arithmetical mean deviation of the assessed profile. The inch equivalent parameter is CLA (centre line
  • The ABC's of Rz
    depth-is the most commonly specified surface finish parameter in Germany and several other European countries, instead of the U.S. preferred choice, Ra. However, it turned out that the Rz specified was not the current ISO or U.S. standard version they were used to, but a much older Japanese domestic
  • Medical Device Link .
    CNC machine suited for producing microtitreplate moulds A CNC machining centre is capable of milling hardened steel and achieving an 0.1- um Ra surface roughness. The Evo machine from Kern Micro- und Feinwerktechnik (Murnau-Westried, Germany) can be fitted with a range of accessories and options

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