To facilitate their combination with needle roller and cage assemblies or the outer ring assembly of needle roller bearings, they have a lead-in at each side of the raceway.
为便于与滚针轴承的滚针和保持架组件或外圈组件结合，内圈在滚道两侧有引入槽。
2
The needle roller bearings without flanges are separable, i. E. The outer ring, the needle roller and cage assembly and the inner ring can all be mounted separately.
不带法兰的滚针轴承是可分离的，即外圈、滚针和保持架组件以及内圈都可分别安装。
3
Adopting are type run-out of tool during pressing the window shape of thin thickness type M needle roller cage, the product quality can be improved & the bearing life can be extended .