1. What is Drill Feed Speed?

Drill feed speed refers to the rate at which a drill bit advances into the workpiece during drilling operations. It is a critical parameter that affects drilling efficiency, tool life, and hole quality.

2. How Does the Calculator Work?

The calculator uses the feed speed formula:

Where:

• \( RPM \) — Rotations per minute of the drill
• \( Feed\ Per\ Rev \) — Distance the drill advances per revolution (in/rev)

Explanation: The feed speed represents the linear travel rate of the drill bit into the material, measured in inches per minute.

3. Importance of Feed Speed Calculation

Details: Proper feed speed calculation is essential for optimizing drilling operations, preventing tool breakage, achieving desired surface finish, and maximizing tool life while maintaining efficient material removal rates.

4. Using the Calculator

Tips: Enter the spindle RPM and feed per revolution values. Both values must be positive numbers. The calculator will compute the feed speed in inches per minute.

5. Frequently Asked Questions (FAQ)

Q1: What factors affect feed per revolution?
A: Feed per revolution depends on drill diameter, material being drilled, drill material, and desired hole quality.

Q2: How does feed speed affect drilling?
A: Too high feed speed can cause tool breakage and poor surface finish, while too low feed speed reduces efficiency and may cause work hardening.

Q3: What are typical feed per revolution values?
A: Typical values range from 0.001-0.020 in/rev depending on drill size and material, with smaller drills using lower feed rates.

Q4: When should feed speed be adjusted?
A: Adjust feed speed when changing materials, drill sizes, or when experiencing tool wear, chatter, or poor hole quality.

Q5: How does feed speed relate to chip formation?
A: Proper feed speed ensures continuous chip formation, preventing built-up edge and ensuring efficient chip evacuation from the hole.