Micrometer, also known as measuring instrument, includes granite micrometer, marble micrometer, rock micrometer, and granite micrometer.
Purpose: Used for parallel and planar measurement of precision components. Dimensional inspection for relative measurement of parts or finished products using dial gauges, dial indicators, and electronic probes.
matters needing attention
① When measuring, stop using the knob when the micrometer screw is approaching the object being measured, and use the fine adjustment knob instead to avoid excessive pressure. This can ensure accurate measurement results and protect the micrometer.
② When reading, pay attention to whether the half millimeter mark on the fixed scale has been exposed.
③ When reading, there is an estimated reading number on the thousandth, which cannot be thrown away casually. Even if the zero point of the fixed scale is aligned with a certain scale line of the movable scale, it should still be read as "0" on the thousandth.
④ When the anvil and the micrometer screw are brought together, the zero point of the movable scale does not coincide with the zero point of the fixed scale, resulting in zero error. It should be corrected by removing the zero error value from the final length reading