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Turning Surface Finish Calculator

The Turning Finish Calculator in the Web Machinist Program can calculate the Surface Finish of Turned Parts in both RA and RMS formats.  (See below)

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The Web Machinist Turning Surface Finish Calculator is Included in the Web Machinist Program that you can Purchase Here

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You can calculate the turned surface finish based on the Tool Nose Radius and Feed Rate as seen below:

In the example above a Tool Nose Radius of .0156 and a Feed Rate of .005 Inches Per Revolution (RPM) is input and a Turning Surface Finish of 67Ra and 74RMS is Calculated as seen below:

In the Web Machinist Turning Surface Finish Calculator you can also calculate the Feed Rate needed to obtain the desired Turned Surface Finish in Ra format based on the Tool Nose Radius and the Desired Turned Surface Finish in Ra format as seen in the example below:

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The above Turning Surface Finish Calculation results in the the .0049 Feed Rate with a Tool Nose Radius of .032 to obtain a 32Ra Turned Surface Finish as seen below: