The diameter is determined by the principle of abutting the cylindrical object to be tested at three points. The first measuring ruler attached to the ruler body and the first measuring ruler attached to the ruler are placed on the cylindrical object to be tested, and the vernier scale on the moving ruler is moved so that the ruler of the second measuring ruler is also in contact with the measured object. The body directly reads the diameter of the circle.
With the new ruler, the first measuring ruler and the second measuring ruler are connected by a living hinge, which can be easily folded into a short portable ruler, which is very practical.
Item
Measuring Range
Reading Valve
Indicating Error
80-130 mm
±0.02
130-230 mm
±0.02
230-350 mm
±0.02
350-480 mm
±0.02
480-750 mm
±0.02
1. Keep the measuring instrument body clean and free of dirt. It is forbidden to contact with corrosive objects and apply anti-rust oil after using. 2, It should be handled with care, no strong impact.
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