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Founded in 1991, Ningbo Sunrun Bicycle Co., ltd & Its branch company Ningbo Tongkin Technology Co., Ltd.

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OEM/ODM Shifter Transmission Group Set Series
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Ningbo Tongkin Technology Co., Ltd.
About SunRun

Ningbo Dongjin Technology Co., Ltd is China OEM Shifter Transmission Group Set Series Supplier and ODM Shifter Transmission Group Set Series company was founded in 1991, specializing in the production of bicycle transmission systems, braking systems and other components. The leading products include a series of derailleurs, variable speed flywheels, high-end cassette hubs, disc brakes, brake components, cranksets and more than 300 varieties in six categories.

In 2015, in response to Made in China 2025, the company established Ningbo Dongjin Technology Co., Ltd. to develop a new internal and external variable speed transmission system, entering the first echelon of the domestic industry. "Chicheng wheel industry, quality first" is the pursuit of quality by Richeng people. The company has introduced internationally advanced key technologies such as precision cold forging, CNC machining, heat treatment, and multi-station stamping to develop transmissions with Richeng characteristics. , transmission kit, sales volume leads domestic peers. The registered brands SUNRUN, TONGKEEN and HEMU enjoy high reputation in domestic and foreign markets. The company has independent export rights, and its products are exported to Europe, North America, Central and South America, Africa, Southeast Asia and other countries and regions. Xu Mingqiang, chairman of the company, sincerely invites domestic and foreign merchants to come for negotiation and guidance.

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Industry Knowledge Extension

How to ensure the cleanliness of the installation area to avoid affecting the installation quality and performance of the Shifter Transmission Group Set Series?

Ensuring the cleanliness of the installation area is critical to ensuring the installation quality and performance of the Shifter Transmission Group Set Series. Here are some suggestions to ensure the cleanliness of your installation area:
Pre-cleaning:
Before starting installation, conduct a thorough cleaning of the installation area, including removing impurities such as dust, oil, metal fragments, etc.
Clean using a vacuum cleaner, cleaning cloth or appropriate detergent to ensure the surface is free of residue.
Controlling who enters the installation area:
Limit the number of personnel entering the installation area and require them to wear clean work clothes and shoes.
Smoking, eating, or other activities that may produce pollution are prohibited in the installation area.
Use cleaning tools and equipment:
Use clean, dust-free tools and equipment for installation work and avoid using contaminated or worn tools.
Regularly clean and replace tools and equipment used to ensure they remain in good working order.
Maintain a clean environment:
During the installation process, keep the installation area closed to prevent external contaminants from entering.
Regularly clean up waste and excess materials generated during the installation process to keep the work area tidy.
Pay attention to the cleaning of installation parts:
Before installation, clean components to ensure they are free of oil, dust, or other contaminants.
Use a clean cloth or paper towel to wrap parts to avoid exposure to contaminants during installation.
Use clean lubricant:
If you need to use lubricant during installation, make sure the lubricant is clean and suitable for the relevant parts.
Avoid using contaminated or deteriorated lubricants.
Cleaning after installation:
After installation is complete, clean the installation area again to ensure that no waste or tools are left behind.
Clean the work area to ensure the installation environment is clean and hygienic.
Through the above measures, the cleanliness of the installation area can be ensured to the greatest extent, thereby improving the installation quality and performance of the Shifter Transmission Group Set Series. At the same time, it is also necessary to pay attention to following the requirements of the product manual and installation guide during the installation process to ensure that every step of the operation is correct.