2. When in use, the π ruler is wound around the workpiece once, and the average diameter of the measured workpiece can be directly read by the vernier reading method. 1, high accuracy: because the diameter of π ruler is measured by perimeter, the error of marking can be reduced by π times when making ruler, which is reflected in the measurement results. Therefore, its accuracy is higher than that of vernier caliper in the measurement of large diameter above φ500mm. This advantage is particularly prominent in the measurement of φ1000 mm.
2. When measuring steel parts with π ruler, it is not affected by the temperature of the workpiece. This is because the π ruler is very thin and will be isothermal with the measured part in a short time, and because their thermal expansion coefficients are very close, the influence of temperature is basically overcome.
3. In the measurement of large diameter and super-large diameter, it can be easily operated by one person through the accessory (patented magnetic bridge).
4, measuring thin-walled parts is not easy to cause workpiece deformation.
5, easy to carry and keep.
6. The price is low.
7. Disadvantages: unable to lock the reading; Geometric deviations, such as ovality, cannot be measured. According to scientific, rigorous and advanced management methods such as standardization, rationalization, standardization and humanization, the company has a set of perfect control and testing procedures in the production process, and strives to make the products perfect. Service is the source of survival, and quality is the root of survival. We will take "honesty as the foundation, reputation as the guarantee" and "quality first, customer first" as the purpose, and always care for and support the company's new and old customers with better quality, more advanced products and more thoughtful service returns.