The O-ring is only composed of a piece of elastic steel band, and its two ends are respectively engraved with the main ruler and the subsidiary ruler.So specification of o-rings accurately measure of O-ring specifications will be explained below.
The minimum graduation value of the main ruler is 0.5mm, and the minimum graduation value of the subsidiary ruler is 0.05mm.
The diameter of the O-ring is measured through the circumference, so the error of the engraved line during production is reduced by π times and reflected in the measurement result. The indication accuracy of the pie rule (π ruler) above φ500mm is higher than that of the same specification vernier calipers, and the larger the diameter, the higher the indication accuracy.
Sealing ring inner diameter measuring ruler, O-ring inner diameter measuring ruler is convenient for measurement:
O-ring inner diameter measurement: When measuring, place the measured part on a table or glass plate, roll the π ruler to be smaller than the inner diameter of the measured circle, and place it in the circle with the help of a measuring accessory magnetic column, and apply a certain amount of Thrust, when the π ruler is attached to the measured part, it adopts the vernier principle to read, and it can directly and accurately read the average inner diameter of the measured O-ring without conversion.
O-ring outer diameter measurement: When measuring, place the measured part on the table or glass plate, and roll the π ruler to be larger than the outer diameter of the measured ring. When the π ruler is attached to the measured part, the vernier principle is adopted for reading , Without conversion, you can directly and accurately read the average outer diameter of the tested O-ring (the reading value minus two feet thickness).
