Cummins Bus Generator

Our cooperation with Cummins is a profound complementary advantage and industrial synergy in the field of new energy commercial vehicles.

 Cummins, our partner, is a leading global provider of power solutions, with profound technological accumulation and market prestige in the fields of diesel and natural gas engines, hybrid and electric powertrain systems. Their business runs through the entire power industry chain, especially in the research and development of cutting-edge technologies to promote the transition of commercial vehicles to new energy, and they have always been in a leading position in the industry.

 In this collaboration, Hehua Machinery Technology (Kunshan) Co., Ltd. played a crucial role as precision manufacturing experts. We have undertaken the precision machining and manufacturing tasks of the key component - the bus generator - for Cummins' new energy bus project with our core expertise in mechanical processing. The specific component manufactured for this project is a Rotor Hub, which is used in public transportation applications.

Specifically, the core of our work is to transform its sophisticated design drawings into high-performance, high reliability physical products. This involves high-precision machining, heat treatment, and overall assembly of the core components of the generator, such as the housing, shafts, and end caps. We ensure that this bus generator has excellent performance consistency, structural stability, and long service life through advanced processing technology, strict quality control system, and rich manufacturing experience, thus perfectly meeting Cummins' top standards for efficiency, reliability, and safety of its new energy bus power system.

For this project, the Rotor Hub has a part size of Φ246 × 345 mm and a part weight of approximately 37 kg. The component is manufactured from Q355D material. Before machining, the part undergoes a black oxide coating treatment in accordance with GB/T 15519 (ISO 11408), providing the required surface treatment before subsequent machining operations.

The manufacturing process includes turning, heat treatment, CNC machining, chamfering and deburring, and turning. Each manufacturing stage is carefully controlled to ensure dimensional accuracy, surface quality, and machining consistency, meeting the requirements of Cummins' precision components.

After machining, the Rotor Hub undergoes dynamic balance testing with weight removal. The balancing radius is 110.5 mm. This process helps ensure stable rotational performance and reliable operation of the finished component in its public transportation application.

This successful cooperation not only reflects our outstanding vertical integration and precision manufacturing capabilities as a supply chain enterprise, but also demonstrates our ability as a trusted partner to deeply support the innovation and development of top global enterprises in the new energy era.