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Timing Pulley

‌Synchronous pulley ‌is a mechanical transmission element, also known as synchronous pulley or synchronous belt pulley, mainly used to transfer torque and movement to maintain the synchronous performance of the transmission device. ‌Synchronous pulley is usually made of metal or plastic.

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    Ladder type straight tooth tooth size(unit:mm)

     


    Type

    Involute tooth profile

    Tooth angle

    Bottom width of cogging

    ht(tooth height)

    Fillet

    Tip
    节距Pb 2y° bw hg 半径rb 半径rt
    MXL 2.032 (56)40 (0.61)0.67 0.69 0.30 0.23
    XXL 3.175 50 0.41 0.84 0.35 0.30
    XL 5.080 1.27 1.65 0.41 0.64
    L 9.525 40 3.10 2.67 1.19 1.17
    H 12.700 4.24 3.05 1.60 1.42
    XH 22.225 7.59 7.14 1.98 2.39
    XXH 31.750 11.61 10.31 3.41 3.18

     

     

     

    T gear tooth size(unit:mm)

     


    Type

    pitch

    Tooth angle

    Top tooth width

    ht(tooth height)

    Fillet

    Tip
    Pb 2y° brSE brN hg SE hg N 半径rb 半径rt
    T2.5 2.50 50 1.75 1.83 0.75 1.00 0.20 0.30
    T5 5.00 2.41 3.32 1.25 1.95 0.40 0.60
    T10 10.00 6.02 6.57 2.60 3.40 0.60 0.80
    T20 20.00 11.65 12.60 5.20 6.00 0.80 1.20

     

     

     

    AT type gear tooth size (unit:mm)

     


    Type

    pitch

    Tooth angle

    Bottom width of cogging

    ht(tooth height)

    Fillet

    Tip
    Pb 2y。 S hg 半径rb 半径rt
    AT3 3.00 50 1.50 1.00 0.20 0.30
    AT5 5.00 2.70 1.10 0.40 0.70
    AT10 10.00 5.40 2.35 0.50 1.20
    AT20 20.00 10.00 5.00 1.75 2.50

     

     

     

    HTD circular arc tooth profile size (unit:mm)

     


    Type

    pitch

    Groove width

    Tooth height

    Clearance circle

    Tip
    Pb s hg 半径R 半径rt
    3M 3.00 1.90 1.28 0.91 0.26-0.35
    5M 5.00 3.25 2.16 1.56 0.48-0.52
    8M 8.00 5.35 3.54 2.57 0.78-0.84
    14M 14.00 9.80 6.20 4.65 1.36-1.50
    20M 20.00 14.80 8.60 6.84 1.95-2.25

     

     

     

    STPD/STS type gear tooth size (unit:mm)

     


    Type

    pitch

    Groove width

    Tooth height

    Clearance circle

    Tip
    Pb s hg 半径R 半径rt
    3M 3.00 1.90 1.28 0.91 0.26-0.35
    5M 5.00 3.25 2.16 1.56 0.48-0.52
    8M 8.00 5.35 3.54 2.57 0.78-0.84
    14M 14.00 9.80 6.20 4.65 1.36-1.50
    20M 20.00 14.80 8.60 6.84 1.95-2.25

     

     

     

     

     

    Picth tolerance

     

    outside diameter pitch Distance between too coIse gears within 90 tolerance
    <25.40-0 0.03 0.05
    >25.40-50.80 0.03 0.08
    >50.80-101.60 0.03 0.10
    >101.60-177.80 0.03 0.13
    >177.80-304.80 0.03 0.15
    >304.80-508.00 0.03 0.18
    >508.00 0.03 0.20

     

     

    Tolerance of outside diameter of pulley

     

    outside diameter pitch Tolerance
    <25.40 +0.050
    >25.40-50.80 +0.080
    >50.80-101.60 +0.100
    >101.60-177.80 +0.130
    >177.80-304.80 +0.150
    >304.80-508.00 +0.180
    >508.00 +0.200

     

     

    Allowable bounce of pulley end

     

    outside diameter pitch Allowable bounce
    <101.60 0.10
    >101.60-254.00 轮外径x0.001
    >254.00 0.25+【(轮外径x254.00)x0.0005】

     

     

    Allowable bounce of pulley warp direction

     

    outside diameter pitch Tolerance
    <203.20 0.13
    >203.20 0.13+【(轮外径x203.20)x0.0005】
ABOUT US
As China Synchronous Pulley Manufacturers and Timing Pulley Suppliers, Ningbo Slongwang Synchronous Belt Co,.Ltd. specializes in the production of "Slongwang" brand synchronous belts and pulleys that meet international standard tooth profiles, as well as poly-V belts and pulleys, and other belt transmission products. Our product range includes rubber circular synchronous belts, rubber open-end synchronous belts, polyurethane PU circular synchronous belts, polyurethane PU open-end synchronous belts, polyurethane PU spliced synchronous belts, double-sided tooth synchronous belts, arc tooth synchronous belts, trapezoidal tooth synchronous belts, flat belts, V-belts, tooth bars, tooth plates, tensioners, and matching pulley wheels. With over 30 models and more than 3,000 specifications available, we are comprehensive manufacturers of synchronous belt products in China.
Located by the affluent and beautiful Hangzhou Bay, our company enjoys a scenic location with mountains and water, and a talented workforce. The old factory is situated along the 329 National Road in Longshan Town, while the new factory is conveniently located in the Longshan Industrial Park by the sea. In the past twenty years, through the hard work and innovation of our dedicated employees, we have established strong cooperative relationships with nearly a thousand clients in China and are expanding into international markets. Our company is equipped with advanced machinery, standardized manufacturing processes, comprehensive testing equipment, and strict enterprise management. Our technical management team, which includes some of the earliest developers of synchronous belt transmission products in China, boasts a wealth of professional experience. We have obtained ISO 9001:2000 certification, ensuring the quality of our products, which are widely used and recognized by clients in various industries both domestically and internationally, earning a good reputation for the "Slongwang" brand.
Our products are extensively used in various industries, including machine tools, textiles, printing, food packaging, home appliances, engraving, wire and cable, instruments, petrochemicals, tobacco, and communications, for the transmission of new mechanical drives.
Adhering to the traditional virtues of "sincerity, honesty, and earnestness," Slongwang advocates for high-quality and affordable products to achieve a win-win situation. We strive to lead the market with reliable products, more favorable prices, and faster delivery times, aiming to attract a broader range of partners. With a vision to establish a strong and large enterprise that stands the test of time, we are committed to creating a century-old business. We are eager to work with visionaries worldwide to forge a brilliant future.
Synchronous pulley consists of a circular belt with evenly spaced teeth on its inner circumference and a correspondingly engaging pulley. It combines the advantages of belt drives, chain drives, and gear drives. During transmission, power is transferred through the meshing of the belt teeth with the pulley's tooth grooves.
Synchronous pulley offers precise transmission ratios, no slippage, and constant speed ratios, ensuring smooth operation, vibration absorption, low noise, a wide range of transmission ratios (up to 1:10), and allowable linear speeds of up to 50 m/s. It can transmit power from a few watts to hundreds of kilowatts. With high transmission efficiency, generally reaching 98%, it is compact, suitable for multi-shaft transmission, and requires no lubrication, making it pollution-free and ideal for environments where contamination is not allowed or where working conditions are harsh.
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Synchronous Wheel Industry knowledge

The transmission advantages of timing pulley and synchronous belt

Timing pulleys are widely used in many mechanical equipment to transmit torque and motion, thereby ensuring the synchronization and precision of the transmission system. It is often used in conjunction with synchronous belts (such as polyurethane synchronous belts, rubber synchronous belts, etc.) to play an important role. Ningbo Slongwang Synchronous Belt Co., Ltd. is a leading manufacturer and supplier of double-sided toothed synchronous belts in China, dedicated to producing high-quality synchronous belts and pulleys. The company offers a wide range of products, including synchronous pulleys, multi-ribbed belts and pulleys, tensioners, etc., suitable for various industrial fields.
Synchronous pulleys are usually made of metal, plastic or other high-performance materials to ensure that they perform well in high-load, long-term operation environments. Unlike traditional gears and belts, the design of timing pulleys makes the tooth shape and pitch accurately match the tooth shape of the synchronous belt, thereby ensuring that no slip occurs during the transmission process and maintaining efficient and stable transmission effects. This feature makes timing pulleys important in occasions where precision motion control is required, especially in automation equipment, automobile engines and precision instruments.
The main function of the timing pulley is to transmit power to the synchronous belt to maintain the synchronization of the transmission system. It ensures the stability of the belt drive system at high speeds and high loads by precisely meshing with the teeth on the synchronous belt. In the fields of automotive engines, conveyor belt systems, CNC machine tools and industrial robots, the accuracy and stability of timing pulleys are crucial to the normal operation of the equipment. Driven by the timing pulley, the equipment can run at accurate speed and synchronization, reducing failures and losses caused by inaccurate power transmission.
Ningbo Slongwang Synchronous Belt Co., Ltd.'s synchronous pulleys use advanced manufacturing processes to ensure that the products have excellent wear resistance and long service life. The material selection of synchronous pulleys is crucial. Metal materials are often used in applications with higher loads, while plastics and composite materials are suitable for applications with lighter weight and lower noise requirements. Depending on different working environments and customer needs, the design of timing pulleys can be customized to meet various specific needs.
The design and manufacturing requirements of timing pulleys are very high, especially in terms of tooth shape, material and structure. Since the tooth shape of the synchronous belt and the tooth shape of the pulley need to match accurately, the production of timing pulleys usually adopts precision machining technology. In this process, manufacturers need to consider multiple factors, including the size of the pulley, the number of teeth, pitch, material, and processing technology, to ensure that the final product can maintain good meshing with the synchronous belt during use to avoid slippage or gear shedding.
Ningbo Slongwang Synchronous Belt Co., Ltd. has accumulated rich experience in the production of synchronous belts and pulleys. The company provides a full range of synchronous pulleys, covering various tooth shapes, specifications and materials, which can meet the needs of different industries and customers. The company's products are manufactured in accordance with international standards, with reliable quality, and can provide customized services according to the specific needs of customers. Whether in the automotive, machinery, electronics or other industries, Slongwang's synchronous belts and synchronous pulleys can provide customers with efficient and stable power transmission solutions.

High-performance timing pulley: Improve equipment transmission accuracy

In modern industry, the accuracy and stability of the equipment transmission system are one of the key factors to ensure production efficiency and long-term reliable operation of the equipment. Synchronous belts and timing pulleys, as important components of mechanical transmission systems, are widely used in various precision transmission occasions, such as CNC machine tools, robots, food packaging, etc. Ningbo Slongwang Synchronous Belt Co,.Ltd. is a manufacturer specializing in the production of synchronous belts and timing pulleys. Its products are characterized by high precision and high durability, which can effectively improve the transmission accuracy and work efficiency of the equipment.
The combination of high-performance timing pulleys and synchronous belts enables the mechanical transmission system to achieve precise synchronous motion, thereby avoiding slip and error accumulation in traditional transmission methods, and ensuring the stability and accuracy of the machine. Especially in application environments that require high load, high precision and low noise, the advantages of high-performance timing pulleys are particularly prominent.
High-performance timing pulleys are usually made of high-strength metal or engineering plastics. These materials have excellent wear resistance, corrosion resistance and high temperature resistance, and can withstand long-term high-load operation without deformation or wear. The timing pulleys provided by Ningbo Slongwang Synchronous Belt Co., Ltd. are precision-processed and strictly quality-controlled to ensure that each product can operate stably in harsh industrial environments.
In practical applications, equipment such as CNC machine tools, automated production lines, and precision instruments often require very high transmission accuracy and stability. These devices usually work in a high-load, high-speed environment. Once the transmission system deviates, it may cause equipment downtime or production line failure. Therefore, the application of high-performance timing pulleys can effectively reduce these risks and ensure that the equipment can operate efficiently and stably for a long time.
High-performance timing pulleys also have the characteristics of low noise and low vibration. This is because the meshing accuracy between the synchronous belt and the pulley is high, which avoids the friction and irregular noise common in traditional transmission methods. In precision machinery or environments with high noise requirements, the use of high-performance timing pulleys can not only improve transmission accuracy, but also improve the comfort of the working environment.
The timing pulley and synchronous belt combination provided by Ningbo Slongwang Synchronous Belt Co., Ltd. is widely used in various high-precision and high-load industries, including CNC machine tools, automation equipment, robots, medical equipment, food packaging, etc. The company ensures the high precision and high stability of its products through strict R&D and manufacturing processes, and can meet customers' high standards for transmission system accuracy and efficiency.

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