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Square end milling cutters, also known as flat end mills, are currently used in the industrial sector. In this case, tungsten carbide is used to cut the circuit boards. Also, note that tungsten carbide works similarly for cutting other materials and metals. It is most productive to use tungsten carbide end mills. Their shape can be either general-purpose or high-performance ones in terms of their shape. Each endmill is extremely hard and robust while also being extremely sharp, which is helpful when cutting at the bottom of your PCB. It has a relatively long flute, about 8mm, which allows it to cut a lot of layers simultaneously. Although we are not used to bits of this length, they are still quite effective and are reasonable in price, so they are worth replacing if broken. A 40-degree helix angle is designed for high-performance profile milling on CNC machines, and the tools are manufactured from premium carbide, ensuring longer tool life and better performance. Carbon square end mills are excellent in their heat and wear resistance characteristics. An end mill made of high-speed steel, cobalt, or powdered metal, is more challenging than another mill made of any other material. A square end mill has a nose and is used to finish the inside corners of curved surfaces with 90° flat bottoms when the end mill is rotated against the stock. A titanium nitride coating is commonly applied to carbide end mills to enhance performance and prolong the tool’s life when milling heat-resistant alloys and other complex materials.