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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

Shifter Transmission Group Set Series How to adjust and calibrate the transmission?

Shifter Transmission Group Set Series Transmission adjustment and calibration is a critical process designed to ensure optimized transmission performance and smooth shifting. Here are the basic steps for performing a transmission adjustment and calibration:
1. Adjustment of gear shifting mechanism
Check the shift lever:
Make sure the shift lever operates flexibly and is not stuck or loose.
Check the tightness of the connection between the shift lever and the transmission to ensure there is no looseness.
Adjust the shift stroke:
Adjust the travel of the shift lever according to the vehicle manual or manufacturer's recommendations to ensure proper feel and moderate travel when shifting.
Check the shift synchronizer:
For manual transmissions, the status of the synchronizer directly affects the smoothness of shifting. Check the synchronizer for wear or damage and replace if necessary.
2. Sensor calibration
For automatic transmissions equipped with sensors, calibration of the sensors is critical to ensuring the accuracy and responsiveness of the shift logic.
Diagnostic device connection:
Use professional diagnostic equipment connected to the vehicle's diagnostic interface.
Read sensor data:
Read real-time data from transmission sensors through diagnostic equipment, including input shaft speed, output shaft speed, oil temperature, etc.
Sensor calibration operations:
Calibrate the sensor according to the diagnostic device's prompts or the manufacturer's calibration procedure. This often involves specific driving patterns and procedures to ensure the accuracy of the sensor data.
3. Software update and configuration
Check transmission software version:
Check the transmission's software version with a diagnostic device to make sure it's compatible with the vehicle's other systems.
Software update:
If a new software version is found to be available, follow the manufacturer's instructions for software updates. This helps fix potential issues, improve performance and optimize shift logic.
Configuration adjustments:
The configuration of the transmission is adjusted through diagnostic equipment based on actual vehicle usage and driver preference. For example, you can adjust the position of the shift point, change the response speed of the shift logic, etc.
4. Test run and verification
After completing the adjustment and calibration, perform a test run to verify the performance and shifting effect of the transmission. During the test drive, pay attention to check whether the gear shift is smooth, whether the response is rapid, and whether there are any abnormal sounds or vibrations.
Please note that it is important to follow the manufacturer's guidelines and recommendations when performing transmission adjustments and calibrations. If you are not sure how to perform these steps correctly, it is recommended to seek help from a professional technician. Incorrect adjustments can result in reduced transmission performance or failure.