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A “Vee thread” refers to any screw thread that features a triangular profile. This type of thread is characterized by its V-shaped grooves and crests.
Characteristics:
- Triangular Profile: The Vee thread has a triangular cross-sectional profile, with angled grooves and crests forming the thread.
- Angle: The angle of the V-shaped grooves typically varies depending on the specific thread standard or application. Common angles include 60 degrees and 55 degrees.
Evolution and Standardization:
- Unified Screw Threads: In 1958, the triangular profile of the Unified screw threads was adopted as the basis for a new international system of screw threads.
- ISO Screw Threads: This new system, known as ISO screw threads, standardized screw threads internationally. It comprises several metric series and inch series, superseding previous thread standards such as Whitworth threads and Unified screw threads.
- Metric and Inch Series: The ISO system includes metric series for metric-based applications and inch series for applications still using imperial measurements. These series provide standardized thread specifications for various industries and applications.
Advantages:
- Interchangeability: Standardizing screw threads based on the Vee profile allows for greater interchangeability of threaded components across different manufacturers and industries.
- Ease of Measurement and Manufacturing: The simple geometric shape of the Vee thread facilitates easier measurement and manufacturing compared to more complex thread profiles.
- Widespread Adoption: The adoption of ISO screw threads has led to widespread use of Vee threads in industries worldwide, contributing to uniformity and compatibility in threaded connections.
In summary, a Vee thread is characterized by its triangular profile and is widely used in various industries for threaded connections. The adoption of ISO screw threads based on the Vee profile has facilitated international standardization and improved interchangeability of threaded components.
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