A bearing factory in Suzhou set strict requirements for dimensional accuracy, material uniformity, and delivery times for annular forgings when producing large bearings. The forgings supplied by the factory's original suppliers had issues such as large wall thickness deviations and loose internal structure, resulting in a high rate of scrap in subsequent machining and unstable delivery cycles, which affected the overall production plan. To address these pain points, Jianing Forging provided customized ring forging solutions, successfully meeting customers' demands for high precision and consistency through optimized forging processes and strict process control.

Customer pain points

The main challenges encountered by this bearing factory during production include:

• Insufficient dimensional accuracy: The tolerances for the outer diameter, inner diameter, and cross-section of the original forging are too large, making machining allowance difficult to control, which leads to more time and cost spent on the turning process.
• Uneven material structure: Internal circulation disorder, coarse grains, or localized looseness of the forgings affect the service life and reliability of finished bearings.
• Delivery cycle fluctuations: Supplier capacity is unstable, urgent order responses are slow, making it difficult for the plant to prepare materials and often requiring temporary adjustments to the production line.

Solutions and product advantages

To address these pain points, Jianing Forging offers the following solutions:

• Fine forging process: Uses multi-pass temperature-controlled ring rolling technology, combined with fine die design, keeping the dimensional tolerance of ring forgings within ±1mm (depending on specifications), effectively reducing machining allowance.
• Full-process material control: From ingot smelting to post-forging heat treatment, strict process specifications are followed, and ultrasonic testing, mechanical property testing, and other methods help ensure dense internal structure and rational flow distribution, meeting the technical requirements of bearing steels (such as GCr15, 42CrMo, etc.).
• Flexible production scheduling and rapid delivery: Equipped with multiple CNC ring rolling machines and supporting heat treatment equipment, enabling rapid small-batch trial production and stable large-scale supply, with routine order delivery times shortened by more than 15% compared to the industry average.

Through collaborative verification, after adopting Jianing's ring forgings, the bearing factory reduced the machining scrap rate by about 30%, significantly improved production continuity, and the stability of product quality was recognized by its end customers.