Abstract：Li Yang Hengdong Bearing Co., Ltd. is a new-type enterprise integrating R&D, production and sales in China's auto parts industry. Located in Shezhu Industrial Park, Li Yang City, Jiangsu Province—a millennium-old town south of the Yangtze River, the company enjoys beautiful surroundings and convenient transportation, with easy access to National Highway 104, Nanjing Lukou International Airport, Wushen Canal and Yangzhou-Liyang Expressway.

Abstract：In the Asian market, Japan is the largest market for Chinese bearing exports. Mainly because in recent years, its development focus has been on high value-added bearings, while ordinary bearings mainly rely on imports. The quality of Chinese ordinary bearing products is comparable to that of Japanese products, and the price is low.

Abstract：Solid ring needle roller bearings have a smaller volume and higher load-bearing capacity. Therefore, this type of bearing can meet the requirements of light weight, small space occupation, and high power transmission. Depending on the application, bearings with or without inner rings can be used. The outer ring has double retaining edges (or double locking rings) with cage needle bearings NA and NKI types.

Abstract：Sliding bearings do not distinguish between inner and outer rings or rolling elements, and are generally made of wear-resistant materials. Commonly used in low speed, heavy load, lubricating oil filling, and difficult to maintain mechanical rotating parts.

Abstract：The centripetal needle roller and cage assembly (needle bearing) is an independent rolling element, with a wide spacing between the two guide surfaces of the cage, which can accurately guide the needle and maintain the correct position of the needle. This type of bearing is suitable for situations where the shaft and seat hole can serve as a raceway. Simply machining the raceway of the shaft and bearing seat hole to the specified dimensional and geometric accuracy can ensure high rotational accu