Needle bearings equipped with fine and long roller (roller diameter of the length is 3 ~ 10 times the diameter, generally not more than 5 mm), so compact structure, the radial diameter and load capacity and other kinds of bearings, at the same time, the minimum diameter, especially suitable for radial installation size restricted supporting the results. According to use different occasions, can choose no inner circle of bearing or needle and keep a component, at this time and match the shaft neck bearing surface and the shell hole surface directly as the rolling bearing, within the surface, to ensure that the load capacity and operating performance and the bearings equipped, same shaft or housing holes on the surface of the groove hardness, processing precision and surface quality shall be the collar and bearings rolling similar way. These bearings can only bear radial load.