OEM/ODM Manufacturer China HS5248 4 Function Electric Multifunctional Gynecological Obstetric Delivery Bed with Good Price
Short Description:
Thread refers to the spiral shaped continuous convex part with specific section made on the surface of cylindrical or conical parent body. Threads are divided into cylindrical threads and conical threads according to their parent shape; It can be divided into external thread and internal thread according to its position in the parent body, and can be divided into triangular thread, rectangular thread, trapezoidal thread, serrated thread and other special shape threads according to its section shape (tooth shape).
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We have been ready to share our knowledge of advertising worldwide and recommend you suitable products at most aggressive costs. So Profi Tools present you ideal price of money and we’ve been ready to create with each other with Birthing Bed, China Delivery Table, To achieve reciprocal advantages, our company is widely boosting our tactics of globalization in terms of communication with overseas customers, fast delivery, the best quality and long-term cooperation. Our company upholds the spirit of “innovation, harmony, team work and sharing, trails, pragmatic progress”. Give us a chance and we’ll prove our capability. With your kind help, we believe that we can create a bright future with you together.
Structural classification
thread
Threads are divided into triangular threads, rectangular threads, trapezoidal threads and serrated threads according to their section shape (tooth profile). Triangular threads are mainly used for connection (see thread connection), and rectangular, trapezoidal and serrated threads are mainly used for transmission. Threads distributed on the outer surface of the matrix are called external threads, and those on the inner surface of the matrix are called internal threads. The thread formed on the cylindrical matrix is called cylindrical thread, and the thread formed on the conical matrix is called conical thread. Threads are divided into left-hand and right-hand threads according to the helix direction. Generally, right-hand threads are used. Threads can be divided into single line and multi line, and most of the threads used for connection are single line; When used for transmission, it requires fast lifting or high efficiency. Double line or multi line is adopted, but generally no more than 4 lines.
Thread direction
Triangular threads are mainly used for connection, while rectangular, trapezoidal and serrated threads are mainly used for transmission; According to the helix direction, it is divided into left-hand thread and right-hand thread, generally right-hand thread; According to the number of helix, it can be divided into single thread, double thread and multi thread thread; The connection is mostly single wire, and the transmission is double wire or multi wire; According to the size of teeth, it can be divided into coarse thread and fine thread. According to different application occasions and functions, it can be divided into fastening thread, pipe thread, transmission thread, special thread, etc.
In cylindrical thread, triangular thread has good self-locking performance. It is divided into coarse teeth and fine teeth. Generally, coarse threads are used for connection. Fine teeth have small pitch, small rising angle and better self-locking performance. They are often used in small parts, thin-walled tubes, vibration or variable load connection and fine-tuning devices. Pipe thread is used for tight connection of pipe fittings. Rectangular thread has high efficiency, but it is often replaced by trapezoidal thread because it is not easy to grind and it is difficult to screw in and center the internal and external threads. The working edge of serrated thread is close to the rectangular straight edge, which is mostly used to bear unidirectional axial force.
The tooth form of conical thread is triangular, which mainly depends on the deformation of the tooth to ensure the tightness of the thread pair. It is mostly used for pipe fittings.
According to the tightness, it can be divided into sealed thread and non sealed thread.We have been ready to share our knowledge of advertising worldwide and recommend you suitable products at most aggressive costs. So Profi Tools present you ideal price of money and we’ve been ready to create with each other with OEM/ODM Manufacturer China HS5248 4 Function Electric Multifunctional Gynecological Obstetric Delivery Bed with Good Price, We sincerely welcome close friends to barter company and start cooperation with us. We hope to affix hands with mates in different industries to make a excellent future.
OEM/ODM Manufacturer China Delivery Table, Birthing Bed, To achieve reciprocal advantages, our company is widely boosting our tactics of globalization in terms of communication with overseas customers, fast delivery, the best quality and long-term cooperation. Our company upholds the spirit of “innovation, harmony, team work and sharing, trails, pragmatic progress”. Give us a chance and we’ll prove our capability. With your kind help, we believe that we can create a bright future with you together.
