What is the recommended procedure for milling a slot sized 0.375 ± 0.005 wide X 0.125 ± 0.005 deep?

What is the recommended procedure for milling a slot sized 0.375 ± 0.005 wide X 0.125 ± 0.005 deep?

• A. Use a 0.375 diameter end mill at full depth
• B. Use a 0.250 diameter end mill to a depth of 0.125 inches
• C. Use a 0.250 diameter end mill to a depth of 0.100 and then a 0.375 diameter end mill
• D. Use multiple passes with a 0.375 diameter end mill

Answer: (C)

The recommended procedure for milling a slot that requires precise dimensions is to first create a pilot cut using a smaller diameter end mill, in this case, a 0.250 diameter end mill. By milling to a depth of 0.100 inches first, you establish a clean slot that can help minimize the stress and ensure better surface quality when finishing with the larger end mill. Following this initial step with a full-width cut using a 0.375 diameter end mill helps achieve the final dimensions while maintaining stability, reducing the load on the tooling, and allowing for improved chip removal. Using a two-pass approach like this is beneficial in achieving the specified tolerances of 0.375 ± 0.005 wide and 0.125 ± 0.005 deep more effectively. This method combines precision and efficiency, taking advantage of the capabilities of each tool while reducing potential issues such as tool deflection and vibration that can occur when attempting to take a full-depth larger cut in one pass.

The recommended procedure for milling a slot that requires precise dimensions is to first create a pilot cut using a smaller diameter end mill, in this case, a 0.250 diameter end mill. By milling to a depth of 0.100 inches first, you establish a clean slot that can help minimize the stress and ensure better surface quality when finishing with the larger end mill.

Following this initial step with a full-width cut using a 0.375 diameter end mill helps achieve the final dimensions while maintaining stability, reducing the load on the tooling, and allowing for improved chip removal. Using a two-pass approach like this is beneficial in achieving the specified tolerances of 0.375 ± 0.005 wide and 0.125 ± 0.005 deep more effectively.

This method combines precision and efficiency, taking advantage of the capabilities of each tool while reducing potential issues such as tool deflection and vibration that can occur when attempting to take a full-depth larger cut in one pass.