圆柱滚子轴承（Cylindrical roller bearings）
圆柱滚子轴承属于精密轴承，精密分选的滚子邮轴圈的挡边引导，由保持架、滚子和引导轴圈组成，可与另一个轴承套圈分离，属于可分离型轴承。此种轴承安装、拆卸比较方便，尤其是当要求内、外圈与轴、壳体都是过盈配合时更显示其优点。
Cylindrical roller bearings belong to precision bearings. Precision sorting roller postshaft rings are guided by the guard edge. They are composed of cages, rollers and guide rings. They can be separated from another bearing ring and belong to separable bearings. This kind of bearing is easy to install and disassemble, especially when the inner and outer rings are required to fit with the shafts and shells with interference.
此类轴承与滚道为线接触轴承。负荷能力大，主要承受径向负荷。只有内、外圈均带挡边的单列轴承可随较小的定常轴向载荷或较大的间歇轴向载荷；与外形尺寸相同的其他累承相比，此种轴承具有高载荷，底噪音和高转速的特性，并且滚动体与套圈挡边摩擦小，适于高速旋转。非常适用与各种精密机械和矿山轧机机械上。但对与此类轴承配合的轴，滚动体等相关零件需要精密加工而成。
The bearings and raceway are linear contact bearings. Heavy load capacity, mainly bear radial load. only single-row bearings with inner and outer rings with retaining edges can be subjected to smaller constant axial load or larger intermittent axial load; compared with other bearings with the same size, such bearings have the characteristics of high load, bottom noise and high speed, and the friction between the roller and the retaining edge of the ring is small, so they are suitable for high-speed rotation. Very suitable for all kinds of precision machinery and mine rolling mill machinery. However, the relevant parts such as shafts and rollers, which are suitable for such bearings, need precise machining.
根据套圈有无挡边，可以分有NU、NJ、NUP、N、NF等单列圆柱滚子轴承，及NNU、NN等双列圆柱滚子轴承。该轴承是内圈、外圈可分离的结构。
According to whether the rings have retaining edges or not, it can be divided into single row cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double row cylindrical roller bearings such as NNU, NN. The bearing is a separable structure of inner ring and outer ring.
内圈或外圈无挡边的圆柱滚子轴承，其内圈和外圈可以向轴向作相对移动，所以可以作为自由端轴承使用。在内圈和外圈的某一侧有双挡边，另一侧的套圈有单个挡边的圆柱滚子轴承，可以承受一定程度的一个方向轴向负荷。一般使用钢板冲压保持架，或铜合金车制实体保持架。但也有一部分使用聚酰胺成形保持架。
The inner ring and outer ring of cylindrical roller bearings without retaining edges can move relative to the axis, so they can be used as free end bearings. Cylindrical roller bearings with double retaining edges on one side of inner ring and outer ring and single retaining edge on the other side can bear a certain degree of axial load in one direction. Generally use solid stamping cage or copper alloy car to make solid cage. But some use polyamide forming cage.
滚针轴承（Needle bearing）
滚针轴承是带圆柱滚子的滚子轴承，相对其直径，滚子既细又长。这种滚子称为滚针。尽管具有较小的截面，轴承仍具有较高的负荷承受能力，滚针轴承装有细而长的滚子（滚子直径D≤5mm，L/D≥2.5，L为滚子长度），因此径向结构紧凑，其内径尺寸和载荷能力与其它类型轴承相同时，外径最小，特别适用于径向安装尺寸受限制的支承结构。
Roller bearings are roller bearings with cylindrical rollers, and their diameters are very thin and long. This roller is called needle roller. Despite its small cross section, bearings still have high load bearing capacity. Needle roller bearings are equipped with slender and long rollers (roller diameter D < 5mm, L/D < 2.5, L is roller length). Therefore, the radial structure is compact. When the inner diameter size and load capacity are the same as other types of bearings, the outer diameter is the smallest, which is especially suitable for radial safety. A supporting structure with limited dimensions.
所以滚针轴承主要应用于空间受限制的场合，所以在汽车，摩托车，纺机上应用广泛。而且滚针的内圈是选配的，说白了就是如果轴的硬度，粗糙度等符合要求的，可以不配内圈(空间本来就有限)，但是如果轴的加工程度比较低，或者比较软，则需要另配内圈作为滚道。
So needle roller bearings are mainly used in space constrained occasions, so they are widely used in automobiles, motorcycles and spinning machines. Moreover, the inner ring of the needle is optional. In other words, if the hardness and roughness of the shaft meet the requirements, it can not match the inner ring (the space is limited), but if the workability of the shaft is relatively low, or relatively soft, it needs to be matched with the inner ring as the raceway.
圆柱滚子轴承和滚针轴承的区别如下：
The difference between cylindrical roller bearings and needle roller bearings is as follows:
1、圆柱滚子轴承的滚动体是锥形滚轴；滚针轴承的滚动体是针状滚子；
1. The roller body of cylindrical roller bearing is a conical roller, and the roller body of needle roller bearing is needle roller.
2、圆柱滚子轴承的结构相对滚针轴承要大；
2, the structure of cylindrical roller bearing is larger than that of needle roller bearing.
3、圆柱滚子除了能承受径向力以外还能承受轴向力，而滚针滚针轴承只能承受径向力；
3. Cylindrical roller can bear not only radial force but also axial force, while needle roller bearing can only bear radial force.
4、圆柱滚子轴承分单列双列和多列，分别应用到不同的环境和场合；
4, cylindrical roller bearings are divided into single row, double row and multiple columns, which are applied to different environments and occasions.
5、圆柱滚子轴承相对于滚针轴承的工作转速要高；
5, cylindrical roller bearing relative to needle roller bearing high working speed.
6、圆柱滚子轴承一般都是选用优质的轴承钢以及专用钢材；而薄壁滚针轴承是选用钢板冲压而成的。
6. Cylindrical roller bearings are generally made of high quality bearing steel and special steel, while thin-walled needle roller bearings are stamped with steel plates.
适用场合（Application）
在机械设计中，一般先确定轴的尺寸，然后，根据轴的尺寸选择滚动轴承。但是，当轴承在机器的直径方向受到限制时，则选用滚针轴承、特轻和超轻系列的球或滚子轴承；当轴承在机器的轴向位置受到限制时，可选用窄的或特窄系列的球或滚子轴承。
In mechanical design, the size of the shaft is generally determined first, and then the rolling bearing is selected according to the size of the shaft. However, when the diameter direction of the bearing is limited, needle bearings, extra-light and ultra-light series ball or roller bearings are selected; when the axial position of the bearing is limited, narrow or ultra-narrow series ball or roller bearings are selected.
向心滚针与保持架组件、冲压外圈滚针轴承、实体套圈滚针轴承、推力滚针轴承广泛使用在汽车相关信息及工程机械的变速传动系统、转向系统、摩托车发动机连杆等处，适用空间小、承载能力大的场合。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，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果。
Centrifugal needle roller and cage components, stamped outer ring needle roller bearings, solid ring needle roller bearings, thrust needle roller bearings are widely used in automotive information and engineering machinery transmission systems, steering systems, motorcycle engine connecting rods and other places, suitable for small space, large load-carrying capacity occasions. Needle roller bearings are equipped with slender and long rollers (the length of the rollers is 3-10 times of the diameter, and the diameter is generally less than 5 mm), so the radial structure is compact. When the inner diameter size and load capacity of needle roller bearings are the same as other types of bearings, the outer diameter of needle roller bearings is the smallest, which is especially suitable for the bearing results with limited radial mounting size.
