Feed Speed Formula:
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Definition: This calculator determines the optimal feed speed (IPM) for milling operations based on spindle speed, feed per tooth, and number of cutting teeth.
Purpose: It helps machinists and CNC operators calculate the proper feed rate to achieve efficient material removal while maintaining tool life.
The calculator uses the formula:
Where:
Explanation: The spindle speed multiplied by feed per tooth gives feed per revolution, which is then multiplied by number of teeth to get total feed rate.
Details: Proper feed speed calculation ensures optimal material removal rates, prevents tool breakage, and maintains surface finish quality.
Tips: Enter the spindle RPM, feed per tooth (default 0.005 in/tooth), and number of teeth (default 4). All values must be > 0.
Q1: What happens if feed speed is too high?
A: Excessive feed rates can cause tool breakage, poor surface finish, and machine vibration.
Q2: What's a typical IPT value?
A: Common values range from 0.001 to 0.020 in/tooth depending on material and tool type.
Q3: How does material affect feed speed?
A: Harder materials require lower feed rates, while softer materials can handle higher rates.
Q4: Should I adjust for tool wear?
A: Yes, as tools wear, you may need to reduce feed rates to maintain quality.
Q5: How does this relate to chip load?
A: IPT is essentially the chip load - the thickness of material each tooth removes per revolution.