滚针轴承优点：滚针轴承装有细而长的滚子（滚子长度为直径的3~10倍，直

Advantages of needle roller bearings: needle roller bearings are equipped with thin and long rollers (the roller length is 3 to 10 times the diameter, and the diameter is generally not more than 5mm), so the radial structure is compact. <br><br>When the inner diameter size and load capacity are the same as other types of bearings, the outer diameter is the smallest, and it is especially suitable for the support structure with limited radial installation size. <br><br>Needle roller bearings should be combined with bearing rings and applications depending on the application occasions, machining accuracy and surface quality. The needle roller bearing is a bearing unit composed of a radial needle roller bearing and a thrust bearing component. <br><br>Comparison of needle roller bearings: <br>1. The friction coefficient of rolling bearings is smaller than that of sliding bearings, and the transmission efficiency is high. The friction coefficient of general sliding bearings is 0.08-0.12, while the friction coefficient of rolling bearings is only 0.001-0.005; <br><br>2. Rolling bearings have been standardized, serialized, and generalized, suitable for mass production and supply, and are very convenient for use and maintenance; <br><br>3 , Rolling bearing steel, and after heat treatment, therefore, only the rolling bearing having higher mechanical properties and longer service life, and can save manufacturing a plain bearing used in more expensive non-ferrous metals; <br><br>4, a small gap inside the rolling bearing The machining accuracy of each part is high, so the running accuracy is high. At the same time, the rigidity of the bearing can be increased by preloading. This is very important for precision machinery; <br><br>5. Some rolling bearings can bear radial load and axial load at the same time, therefore, the structure of the bearing support can be simplified; <br><br>6. Due to the high transmission efficiency of the rolling bearing and less heat generation, it can be Reducing the consumption of lubricating oil, the lubrication maintenance is relatively easy; <br><br>7. Rolling bearings can be easily applied to shafts in any orientation in space.

滚针轴承优点：滚针轴承装有细而长的滚子（滚子长度为直径的3~10倍，直径一般不大于5mm），因此径向结构紧凑。<br><br>其内径尺寸和载荷能力与其他类型轴承相同时，外径最小，特别适用于径向安装尺寸受限制的支承结构。<br><br>滚针轴承根据使用场合不同，加工精度和表面质量应与轴承套圈、用途组合。滚针轴承是由向心滚针轴承和推力轴承部件组合的轴承单元。<br><br>滚针轴承的对比：<br>1、滚动轴承的摩擦系数比滑动轴承小,传动效率高。一般滑动轴承的摩擦系数为0.08-0.12,而滚动轴承的摩擦系数仅为0.001-0.005；<br><br>2、滚动轴承已实现标准化、系列化、通用化,适于大批量生产和供应，使用和维修十分方便；<br><br>3、滚动轴承用轴承钢制造,并经过热处理,因此,滚动轴承不仅具有较高的机械性能和较长的使用寿命,而且可以节省制造滑动轴承所用的价格较为昂贵的有色金属；<br><br>4、滚动轴承内部间隙很小,各零件的加工精度较高,因此,运转精度较高。同时,可以通过预加负荷的方法使轴承的刚性增加。这对于精密机械是非常重要的；<br><br>5、某些滚动轴承可同时承受径向负荷和轴向负荷，因此，可以简化轴承支座的结构；<br><br>6、由于滚动轴承传动效率高,发热量少，因此，可以减少润滑油的消耗，润滑维护较为省事；<br><br>7、滚动轴承可以方便地应用于空间任何方位的轴上。

Advantages of needle bearing: needle bearing is equipped with thin and long rollers (roller length is 3-10 times of diameter, diameter is generally not more than 5mm), so the radial structure is compact.<br>Its inner diameter and load capacity are the same as other types of bearings, and its outer diameter is the smallest. It is especially suitable for supporting structures with limited radial installation size.<br>According to different applications, the machining accuracy and surface quality of needle bearing should be combined with the bearing rings and purposes. Needle roller bearing is a bearing unit composed of radial needle roller bearing and thrust bearing.<br>Comparison of needle bearing:<br>1. The friction coefficient of rolling bearing is smaller than that of sliding bearing, and the transmission efficiency is higher. The friction coefficient of general sliding bearing is 0.08-0.12, while that of rolling bearing is only 0.001-0.005;<br>2. Rolling bearing has realized standardization, serialization and generalization, which is suitable for mass production and supply, and is very convenient for use and maintenance;<br>3. The rolling bearing is made of bearing steel and heat treated. Therefore, the rolling bearing not only has high mechanical properties and long service life, but also can save the expensive non-ferrous metals used to make the sliding bearing;<br>4. The internal clearance of rolling bearing is very small, the machining accuracy of each part is high, so the running accuracy is high. At the same time, the rigidity of the bearing can be increased by preloading. This is very important for precision machinery;<br>5. Some rolling bearings can bear radial load and axial load at the same time, so the structure of bearing support can be simplified;<br>6. Because the rolling bearing has high transmission efficiency and less heat, the consumption of lubricating oil can be reduced and the lubrication maintenance is relatively easy;<br>7. The rolling bearing can be easily applied to any axis in space.