Gear machines and bevel machines are specialized machines used for the production of gears and bevels. These machines can use various processes such as planing, grinding, milling or slotting to produce gears and bevels with high precision. Measuring machines are used to make accurate measurements of components and workpieces. There are several types of measuring machines, including coordinate measuring machines (CMMs), optical measuring systems, and surface finish measuring devices. Measuring machines are often used in quality assurance to ensure that products meet specified tolerances. Testing machines are used to test the mechanical properties of materials and components. For example, testing machines can measure the tensile strength, flexural strength, or hardness of workpieces. Testing machines are used in materials research and development as well as in quality control to ensure that materials meet requirements and are suitable for their intended applications.