Test procedure for Rockwell hardness tester

(1) Clean the top surface of the screw and the upper and lower end surfaces of the workbench, and place the workbench on the screw table.
(2) Wipe the supporting surface of the specimen and place it on the workbench. Rotate the handwheel to slowly raise the workbench and lift the pressure head until the small pointer points to the red dot and the large pointer rotates 3 turns vertically upward.
(3) Rotate the indicator housing so that the long engraved line between C and B is aligned with the big pointer.
(4) Pull the loading handle to apply the main test force, and the large pointer of the indicator rotates counterclockwise.
(5) When the indicator needle stops rotating, push the unloading handle back to remove the main test force.
(6) Read from the corresponding scale on the indicator.
(7) Turn the handwheel to lower the specimen, then move the specimen and conduct a new test according to the above steps (2)-(6).
(8) After the test, cover the machine with a dust cover.