Sealing ring inner diameter gaugeStructure: The sealing ring ruler is composed of only one elastic steel strip, with main and auxiliary rulers engraved on both ends. The main ruler has a division value of 0.5mm and the auxiliary ruler has a division value of 0.05mm.

Sealing ring inner diameter gaugeFeatures (compared to vernier calipers) and usage:

High precision: By measuring the diameter around the circumference, the engraving error during production is reduced by π times and reflected in the measurement results. The indication accuracy of the π ruler with a diameter of over 500mm is higher than that of the same specification vernier caliper, and the larger the diameter, the higher the indication accuracy.

Sealing ring inner diameter gaugeConvenient measurement:

Inner diameter measurement: When measuring, place the measured part flat on a table or glass plate, roll the "π ruler" into a smaller inner diameter than the measured circle, use the measuring auxiliary magnetic column to place it inside the circle, apply a certain thrust, and when the "π ruler" is in contact with the measured part, use the vernier principle to read the average inner diameter of the measured O-ring without conversion.

Outer diameter measurement: When measuring, place the test piece flat on a table or glass plate, roll the "π ruler" to a diameter larger than the outer diameter of the test ring, and when the "π ruler" is in contact with the test piece, use the vernier principle to read. Without conversion, the average outer diameter of the test O-ring can be accurately read directly (the reading value minus two feet thickness).

Measurement is not limited by the environment and is easy to carry and store.