Vickers method is based on an optical measurement system, it specifies a range of light loads using a diamond indenter to make an indentation which is measured and converted to a hardness value. It is very useful for testing on a wide type of materials, but test samples must be polished to enable measuring the size of the impressions. A square base pyramid shaped diamond is used for testing in the Vickers scale. Typically loads are very light, ranging from 5gf to 2Kgf, although "Macro" Vickers loads can range up to 50 Kg or more. Micro Vickers hardness methods are used to test on metals, ceramics, and composites - almost any type of material. Since the test indentation is very small in a Vickers test, it is useful for a variety of applications: testing very thin materials like foils or measuring the surface of a part, small parts or small areas, measuring individual microstructures, or measuring the depth of case hardening by sectioning a part and making a series of indentations to describe a profile of the

PC-25 low-speed precision cutter is applicable to accurate cutting of hard materials, especially to high-value fragile artificial crystal. There are four kinds of fixtures, so the processed workpiece can be cut at the optimal angle. The machine, with a limit switch, can work without a watchman. The spindle has high accuracy of operation, the horizontal feed position of the processed workpiece can slightly be adjusted, and the machine can be power-off automatically after cutting is finished.