What are the best practices for sharpening carbide end mills
Use the Right Equipment: Invest in a quality diamond wheel grinder specifically designed for carbide. These wheels are necessary because carbide is much harder than high-speed steel.
Grind with Coolant: Carbide can withstand high temperatures, but using coolant helps prevent overheating and maintains the integrity of the carbide. Coolant also helps to wash away swarf (metal filings) during grinding.
Maintain Proper Angles: Carbide end mills have specific angles for the cutting edges and the relief angles. Use a jig or fixture to maintain these angles consistently across all cutting edges.
Inspect and Measure: After sharpening, use a microscope or magnifying glass to inspect the cutting edges for consistency and sharpness. Measure dimensions to ensure they match manufacturer specifications.
Regrind Before Wear Becomes Excessive: It's easier to sharpen carbide end mills when only a small amount of material needs to be removed. Waiting too long can make the process more difficult and affect the end mill's performance.
Practice Regular Maintenance: Implement a schedule for inspecting and sharpening end mills based on their usage. Regular maintenance prolongs their lifespan and ensures consistent cutting performance.
By following these best practices, you can effectively sharpen carbide end mills and maintain their performance over time.
