Views: 255 Author: Site Editor Publish Time: 2025-09-17 Origin: Site
In the production and quality control of disc springs (also known as leaf springs), dimensional accuracy is the key factor determining product performance and reliability. As a professional manufacturer strictly adhering to China's national standard GB/T 1972 for disc springs, Jiangsu Sunzo Spring Elasticity fully understands the critical importance of precise measurement in ensuring each spring's quality. This article will delve into professional inspection methods and standards for measuring disc spring thickness, inner diameter, and outer circumference dimensions.
Many users have a misconception that the thickness can be measured with a common external micrometer. This is not the case, and it is a key technical distinction.
After undergoing processes such as pressing, heat treatment, and high-pressure forming, the disc spring's upper and lower conical surfaces undergo subtle deformation, which may result in convex or concave configurations. At this stage, the conical surfaces are no longer ideal parallel straight lines. When using conventional external cylindrical micrometers for measurement, the flat probe will incorporate the spring's curved surface into its measurement range. This leads to measured values exceeding the actual thickness, significantly compromising precision assessments.
The correct leaf spring measurement technique employs a specialized thickness micrometer (also known as a disk micrometer). Featuring a pointed probe design, this instrument precisely avoids surface interference to directly measure the actual thinnest points at both ends of the spring material, ensuring accurate and reliable data. This rigorous standard is precisely what Sunzo Spring Elastic maintains in its production and quality control processes.
For the inner hole and outer circle size of the leaf spring, conventional testing uses a vernier caliper with an accuracy of 0.02mm.
Outer diameter measurement: the maximum value measured is taken as the standard.
Inner diameter measurement: take the measured minimum value as the standard.
For the mass production of disc springs, in order to improve efficiency and ensure consistency, it is generally used to quickly test the pass/fail gauge. This method can quickly determine whether the product size is within the tolerance band, which is an important means of efficient quality control.
Jiangsu Sunzo Spring Elastic inspection of all products are based on strict specifications:
Finished product inspection: according to customer's product pattern and disc spring national standard GB/T 1972.
Incomplete product inspection: follow the requirements of internal process card (process card).
Standard parts: comply with national or industrial technical standards.
Our process standards are often more stringent than the general national standard, which stems from our deep understanding of disc spring design and manufacturing processes, aiming to provide customers with high performance, high consistency products beyond expectations.
Choose the crowd, choose the professional and accurate
Jiangsu Sunzo Spring Elastic not only offers a full range of premium disc springs but is committed to becoming your trusted technical partner. With decades of expertise in disc spring technology, we meticulously control every step from material selection and precision manufacturing to rigorous quality inspection. This commitment ensures that every delivered spring meets exact dimensional specifications and delivers exceptional performance.
If you are looking for a reliable disc spring supplier, or have questions about disc spring design, selection and application, please contact our technical expert team to provide you with one-stop solution.
SUNZO has it’s own researching and development team and test center, has participate in rule-making of the latest national industry standards and the international ISO standards for disc springs.
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