CNC Feed & Speed Charts

CNC feed and speed charts make common machining values easier to compare. Use every chart with its units and assumptions in view, then confirm the starting point against the tool manufacturer, material grade, machine limits and actual engagement.

Feed and speed charts

Use the charts as a reference around milling, turning, drilling, chip load, SFM and spindle speed calculations. A chart is a starting range, not a universal production setting.

Popular references

• Chip load calculator
• SFM calculator
• Spindle speed calculator
• Feed rate calculator
• Machining formulas

Using a chart correctly

Match the chart to the operation, cutter diameter, tool family and material. Keep metric and imperial units consistent. Adjust for tool overhang, coolant, workholding, machine rigidity, radial engagement and axial depth before using a value on a production job.