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The following charts and tables convert surface finish or roughness between selected industry standard units. Where: Cut-Off Length = Length required for sample. Conversion math at bottom -- μ=0.000001m=0.001mm. μin=0.000001 in=0.0254 μ. Conversions (math): Example: Surface Roughness Value Equivalents.
3 ημέρες πριν · Ra = Roughness Average in micrometers or microinches. RMS = Root Mean Square in microinches. CLA = Center Line Average in microinches. N = New ISO (grade) scale numbers. Cut-off Length = Length required for sample.
Can you convert the R z callout to R a? The answer is not straightforward. Learn why, or head directly to the Ra-Rz converter calculator. What is the difference between R a & R z ? Ra – The arithmetic average of the absolute values of the profile height deviations from the centerline.
The same logic is applied when converting Ra to Rz (or Rz to Ra). Based on statistics, we can forecast the Rz range for a specific Ra with reasonable probability. Use the below calculator and charts, or get a deeper explanation here.
Ra = Roughness Average in micrometers or microinches. RMS = Root Mean Square in microinches. CLA = Center Line Average in microinches. N = New ISO (grade) scale numbers. Cut-off Length = Length required for sample.
1.6 63 63 8 6.3 6.3 fF N7 f2 3.2 125 125 16 12.5 12.5 fO N8 f1 6.3 250 250 25 25 25 fO N9 f 12.5 500 500 50 50 50 fR N10 25 1000 1000 100 100 100 fT N11 50 2000 200 200 N12 100 4000 400 400 N13 200 8000 N14 SYMBOLS & FINISHING GRADE Ra μm AA – CLA μinch Conventional symbols Surface description 0.025 0.05 1 2 Superfinishing Burnishing ...
SPI Finish Guide is known as SPI Mold Finish Guide or SPE-SPI Mold Finish Guide. The complete SPI finish standard covers 12 grades from SPI A1 to D3. At below SPI finish chart, we use surface roughness Ra (μm), finishing methods, recommended steels as references to show each grade’s finish.
