The hardness tester is a suitable semi-automatic hardness measuring instruments, won the national quality silver medal in 1989. Used to determine ferrous metals, nonferrous metals, non-metallic materials and products, Rockwell hardness, widely used in factories and mines, scientific research institutes and universities laboratories. Spindle system uses a frictionless spindle structure, initial test force exerted by the electromagnetic brake control, to improve the accuracy of the initial test force; total test force to impose, maintain, removable automated, eliminating manual brought error; hardness value can be fully automated digital display reading to avoid operator error; random printing device can print out the hardness measurement and data processing results.