What is Chip Load?

Chip load, also known as feed per tooth or chip per tooth, is a crucial parameter in CNC milling operations. It represents the thickness of material removed by each cutting edge of a tool during one revolution. Proper chip load is essential for optimizing cutting performance, tool life, and surface finish quality. Chip load is typically measured in inches per tooth (IPT) or millimeters per tooth (mm/tooth).

How to Use the Chip Load Calculator

Step 1: Enter the Feed Rate

Input the feed rate of your CNC machine in inches per minute (IPM). This value represents how fast the tool moves relative to the workpiece.

Step 2: Input the Spindle Speed

Enter the spindle speed in revolutions per minute (RPM). This is how fast the cutting tool rotates during the operation.

Step 3: Specify the Number of Flutes

Input the number of flutes (cutting edges) on your tool. Common end mills typically have 2, 3, or 4 flutes.

Step 4: Enter the Tool Diameter

Input the diameter of your cutting tool in inches. This helps calculate the chip load per inch of tool diameter.

Step 5: Select the Material

Choose the material you’re machining from the dropdown menu. This helps provide context for the calculated chip load.

Step 6: Calculate and Interpret Results

Click the “Calculate Chip Load” button. The calculator will display the chip load in inches per tooth and the chip load per inch of tool diameter. It will also indicate whether the calculated chip load is within the recommended range for the selected material.

By following these steps, you can quickly determine the optimal chip load for your CNC milling operation, helping to improve tool life, surface finish, and overall machining efficiency.