What precautions should be taken when routinely maintaining a Rockwell hardness tester?

Rockwell hardness testers have been widely applied in industrial production, becoming a primary means of inspecting product quality and determining reasonable processing techniques. They can test various ferrous and non-ferrous metals, and the hardness of quenched steel, tempered steel, annealed steel, surface-hardened steel, sheets of various thicknesses, cemented carbide materials, powder metallurgy materials, and thermal spray coatings. Therefore, the daily maintenance of the Rockwell hardness tester requires attention to the following:
1. When the hardness tester is not in use for a long time, the machine should be covered with a dust cover.
2. Periodically inject a small amount of machine oil into the contact surface between the lead screw and the handwheel.
3. Before using the hardness tester, the top surface of the lead screw and the upper end surface of the worktable should be wiped clean.

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