If you're designing PCBs in Eagle or KiCad and want to turn your designs into real PCBs, you'll need a CNC mill to cut out the copper traces. These end mills were first ordered for our Othermill, but they'll work well with many precision CNC machines. Unlike PCB drill bits that can only cut axially (up and down on the PCB), end mills can move in any direction, allowing for side - to - side and up - and - down drilling. The cutting part is made of tungsten carbide, suitable for cutting circuit boards, soft metals, and other materials. Each end mill has high hardness, wear resistance, and strength, and is extremely sharp, making PCB cutting a breeze. These mill bits have an 8mm flute. Although a bit longer than usual, they work great and are affordable to replace if broken. Keep in mind that carbide bits will dull after about 5 hours of cutting PCBs. This product comes with one 0.7mm carbide end mill in a protective plastic case.
Using this end mill is easy. First, make sure your CNC machine is properly set up and calibrated. Install the end mill in the machine following the manufacturer's instructions. When cutting PCBs or other materials, start at a slow speed and gradually increase it to the appropriate rate. Keep in mind that the end mill can move in any direction, so you have more flexibility in your cutting patterns. As for the notice, remember that the carbide bits will dull after about 5 hours of continuous use when cutting PCBs. Once you notice a decrease in cutting performance, it's time to replace the bit. Also, always handle the end mill with care as it is very sharp. For maintenance, after each use, clean the end mill with a soft brush to remove any debris. Store it in the provided protective plastic case to prevent damage and keep it in good condition for future use.
