How to Distinguish the Quality of Bearing

Time：2020.07.31  Source：Roller Bearings Suppliers

Bearing is an essential thing in life. Bearing is used in many places in life. The quality of bearing directly affects the overall performance of the product.Today let us introduce how to Distinguish the Quality of Bearing

1.Look. Observe the micro bearing processing surface, poor quality micro bearing surface rough, chamfer uneven. The surface of high quality miniature bearing is smooth and smooth, and the chamfering is even.

2. Turn. One hand holds the inner ring of the micro bearing, and the other hand rotates the outer ring of the micro bearing. When the poor quality micro bearing rotates, it can feel the existence of foreign matters in the micro bearing groove, so the selection is not smooth. High quality miniature bearing can rotate smoothly and smoothly without obstruction.Need WSBC 21317 E,click here to learn more.

3. Listen. When the micro bearing is running, the low-quality micro bearing has the "scratch" noise, while the high-quality micro bearing does not have the choice of micro bearing configuration mode.

For fixed-side miniature bearings, select the miniature bearings that can be moved by the rolling surface in the axial direction (such as cylindrical roller miniature bearings) or by the assembling surface (such as centriped-ball miniature bearings).On shorter shafts, where there is little difference between the fixed side and the free side, miniature bearings (e.g., centripest-thrust ball miniature bearings) that move only in a fixed, unidirectional direction are used.

In the grinding process, the working surface of micro bearing is ground by high-speed rotating grinding wheel. Therefore, if the operation and adjustment of equipment are not carried out according to the operation instruction, various defects will appear on the working surface of micro bearing, which will affect the overall quality of micro bearing. In precision grinding of micro bearing, due to the high requirement of roughness, the grinding marks on the working surface can be observed by naked eyes. The main grinding marks are as follows. 

The cross helix trace appears, which is mainly due to the poor flatness of the generatrix of the grinding wheel and the concave convex phenomenon. During grinding, the grinding wheel and the workpiece are only partially contacted. When the workpiece or the grinding wheel moves back and forth for several times, the cross helix will be reappeared on the workpiece and can be observed by naked eyes. The pitch of these helixes is related to the speed of the worktable and the speed of the workpiece, and also to the non parallelism of the grinding wheel axis and the table guide rail.

Deep groove ball bearing: each ring has a continuous groove raceway with a cross section of about one third of the circumference of the ball. It is suitable for precision instruments, low noise motor, automobile, motorcycle and general machinery, etc. It is the most widely used type of bearing in the mechanical industry.Simple structure, easy to use and maintain.It is mainly used to bear radial load and also can bear certain axial load. When the radial clearance of the bearing increases, it has the performance of angular contact ball bearing and can bear larger axial load.Click here to learn more about WSBC 22211 E.

1. Whether there is a muddy oil stain on the surface

2. Whether the stenciled characters are clear

3. Whether the outer packing is clear

4. Is there any noise

The main inspection items are: material, main assembly dimensions (od, OD, height), bearing clearance, rotation accuracy, noise, appearance, etc.

Wuxi Spark Bearing Co.,Ltd has standard system to control our bearings' quality,we will offer you the high quality bearings,we are welcome you any time.