MTMasterTool

CNC Feed and Speed Calculator

Calculate cnc feed and speed for a maker project.

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What this tool does

Calculate cnc feed and speed for a maker project. Manufacturer-selected cutting speed and chip load required; machine rigidity, material, engagement and tool limits must be checked.

How to use the CNC Feed and Speed Calculator

  1. Enter or select tool diameter (mm).
  2. Enter or select recommended cutting speed (m/min).
  3. Enter or select cutting flutes.
  4. Enter or select chip load (mm/tooth).
  5. Read the calculated result; change any measurement to compare alternatives.

Formula

RPM=1000×cuttingSpeed/(π×diameter); feed mm/min=RPM×flutes×chipLoad
diameter
Tool diameter (mm)
speed
Recommended cutting speed (m/min)
teeth
Cutting flutes
chip
Chip load (mm/tooth)

Manufacturer-selected cutting speed and chip load required; machine rigidity, material, engagement and tool limits must be checked.

Worked example

For cnc feed and speed calculator, the following measurements illustrate the exact method: Tool diameter (mm): 6; Recommended cutting speed (m/min): 150; Cutting flutes: 2; Chip load (mm/tooth): 0.03.

Inputs

  • Tool diameter (mm)6
  • Recommended cutting speed (m/min)150
  • Cutting flutes2
  • Chip load (mm/tooth)0.03

Result

  • Spindle speed (RPM)7,957.75
  • Feed (mm/min)477.46

Results explained

Spindle speed (RPM)
Spindle speed (RPM) from the formula above. Manufacturer-selected cutting speed and chip load required; machine rigidity, material, engagement and tool limits must be checked.
Feed (mm/min)
Feed (mm/min) from the formula above. Manufacturer-selected cutting speed and chip load required; machine rigidity, material, engagement and tool limits must be checked.

Frequently asked questions

RPM=1000×cuttingSpeed/(π×diameter); feed mm/min=RPM×flutes×chipLoad

Manufacturer-selected cutting speed and chip load required; machine rigidity, material, engagement and tool limits must be checked.

No. Verify against the machine, tool and material manufacturer's instructions, especially for CNC feeds and speeds.

Measure actual material properties and machine usage, rather than relying on nominal default values.

Yes; your project inputs are never transmitted or stored by MasterTool.