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Needle Roller Bearings The Friction Coefficient Is Higher Than That Of The Sliding Bearing
- Sep 26, 2017 -

Needle roller bearings are cylindrical roller bearings, relative to its diameter, the rollers are thin and long. This roller is called a needle roller. Although the bearing has a small cross-section, the bearing still has a high load bearing capacity, needle roller bearings with thin and long roller (roller diameter D ≤ 5mm, L / D ≥ 2.5, L for the roller length), so Compact radial structure, its inner diameter and load capacity and other types of bearings the same, the smallest diameter, especially for radial installation of the size of the limited support results. According to the use of different occasions, can be used without the inner ring bearing or needle roller and cage components, then match the bearing surface and the surface of the casing hole directly as the bearing inner and outer rolling surface, in order to ensure the load capacity and operating performance With the same ring bearing, shaft or shell hole raceway surface hardness, machining accuracy and surface quality should be similar to the bearing ring raceway. Such bearings can only withstand radial loads. Drawn cup needle roller bearings for the thin stamping of the outer ring of the needle roller bearings.

In addition to the catalog listed, can be used for general engineering bearings, such as: open-type punching outer ring needle roller bearings (1), closed stamping outer ring needle roller bearings (2), with inner ring needle roller bearings (3) and not (4) SKF bearings (1) Needle roller bearings (1) Needle roller bearings (1) Needle roller bearings (1) Needle roller bearings (1) Needle roller bearings Cage assembly 2, non-ribbed needle roller bearings 3, self-aligning 4, the combination of needle / ball bearings 5, the combination of needle roller / thrust ball bearings 6, combined needle roller / cylindrical roller thrust bearings.

Compared 

1. The friction coefficient of the rolling bearing is smaller than that of the sliding bearing, and the transmission efficiency is high. General sliding bearing friction coefficient of 0.08-0.12, while the friction coefficient of rolling bearings is only 0.001-0.005;

2. Rolling bearings have been standardized, serialized, generalized, suitable for mass production and supply, use and maintenance is very convenient;

3. Rolling bearings are made of bearing steel and heat treated. Therefore, rolling bearings not only have high mechanical properties and long service life, but also can save the production of sliding bearings used in the more expensive non-ferrous metals;

4. Rolling bearing internal clearance is very small, the parts of the processing of high precision, therefore, the operation of high precision. At the same time, the rigidity of the bearing can be increased by preloading. This is very important for precision machinery;

5. Some rolling bearings can simultaneously bear radial load and axial load, therefore, can simplify the bearing bearing structure;

6. As the rolling bearing drive high efficiency, less heat, therefore, can reduce the consumption of lubricating oil, lubrication maintenance is more trouble;

7. Rolling bearings can be easily applied to any position on the uranium.