Grizzly G9972Z owner manual Spindle Speed, Calculating the Correct Spindle RPM

Spindle Speed

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Calculating the Correct Spindle RPM

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Note: Cutting speeds are expressed in sur- face feet per minute (SFM) that the cutter moves against the workpiece.

Recommended Cutting Speeds

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Note: These values are based on HSS cutting tools. For carbide cutting tools, double the aver- age speed. These values are a guideline only. Refer to the MACHINERY’S HANDBOOK for more detailed information.

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Note: For this step, you will need to aver- age out the diameters or work with the finish diameter.

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Cutting Speed (SFM) x 4

Spindle Speed =

Diameter of Cut

Example A

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Step 1:

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Step 2:

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Result:

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Example B

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Step 1:

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Step 2:

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Step 3:

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GEB

Result:

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