滚针轴承是一种滚子轴承， 尽管有时滚子尺寸稍微超出了JIS定义的滚针尺寸范围，但通常仍称其为滚针轴承。
Needle roller bearing is a kind of roller bearing. Although sometimes the roller size slightly exceeds the range of needle roller size defined by JIS, it is still commonly called needle roller bearing.
滚针轴承，根据承受载荷的方向，可分为向心轴承和推力轴承。 其中，向心轴承包括：各种系列的冲压外圈型、实体型，以及特殊用途的螺栓型和档圈型滚轮滚针轴承。
Needle roller bearings can be divided into centripetal bearings and thrust bearings according to the direction of load bearing. Among them, the centripetal bearing includes: various series of stamping outer ring type, solid type, as well as special purpose bolt type and gear ring type roller needle bearing