A good set of hardware tools, in addition to proper use, a lot of use, maintenance can not be ignored.
Maintenance of the micrometer, the following 8 points are essential:
1. Check if the zero line is accurate;
2. The workpiece should be wiped clean by the measuring surface during the measurement;
3. When the workpiece is large, it should be placed on a V-shaped iron or flat plate;
4. Wipe the measuring rod and the anvil clean before measuring;
5. A ratchet device is required to tighten the movable sleeve;
6. Do not loosen the back cover to avoid zero line change;
7. Do not add normal oil between the fixed sleeve and the movable sleeve. 8. Wipe off the oil after use, put it in a special box and put it in a dry place.
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Label: hardware tools: micrometer maintenance eight points
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