👉 A microgroove is a type of groove that is defined as having a depth less than 0.125 mm, which is equivalent to about 0.004 inches or 0.008 cm. A microgroove is often used in the context of CNC (computer numerical control) machines and refers to a small, precise hole cut into the material being machined. These microgrooves are typically used for cutting holes in materials such as steel, aluminum,