The common deep groove ball bearing series include series 617, series 637, series 618, series 619, series 60, series 62, series 63, series 64, series 160, etc., as shown in the chart. Different series of bearing mainly have differences in dimension, such as the width of series 637is greater than that of series 617 with the same inner diameter , and the diameter of series 618 is greater than that of series 617 with the same inner diameter. 

In the last video, we introduced the basic code of needle roller bearing, and then we will learn about the code of the tapered roller bearing, which is also special. The standard tapered roller bearing (in accordance with GB/T 273.1) has the code consisting of the basic code and the suffix code. The basic code consists of the bearing type code, the dimension series code, and the inner diameter code.

In the last videos, we learned about the code of rolling bearing. The code of needle roller bearing also consists of the basic code, the prefix code, and the suffix code.

In this video, let’s learn about the suffix code of bearing. The suffix code is represented by letters (or numbers), indicating the characteristics of bearing, which is ordered and grouped as follows: internal structure, sealing and dustproof and external shape, cage and its material, bearing part material, tolerance grade, clearance, arrangement, vibration and noise, and others.Let’s further understand it.

In last videos, we learned the basic code of bearings, which represent standard bearings. When there are changes in the structural shape, dimension, tolerance, technical requirements, etc. of the bearing, it is necessary to supplement the basic code with the prefix code and the suffix code.