Ask a 250 question! I m making needle roller bearings, and I deserve it

22 What can't be, I'm 18 years old, and I'm working hard.

Hello, it is a pleasure to serve you and give you the following answer: The number of needle rollers in a needle roller bearing depends on the size and load of the bearing. In general, the higher the number of needle rollers in a bearing, the greater the load capacity of the bearing.

If it is found that the number of needle rollers in the needle roller bearing is insufficient, the following measures can be taken to solve it:1Check the size of the needle roller bearing to determine whether the number of needle rollers in the needle roller bearing meets the requirements.

2.If the number of needle rollers in the needle roller bearing is insufficient, it can be replaced with a larger size needle roller bearing to meet the load requirements. 3.

If the number of needle rollers in the needle roller bearing is excessive, the smaller size needle roller shaft can be replaced to reduce the load. Personal tip: When selecting needle roller bearings, you should choose the appropriate needle roller bearing size according to the load requirements to ensure that the number of needle rollers in the needle roller bearing meets the requirements.

1. The friction coefficient of rolling bearings is smaller than that of sliding bearings, and the transmission efficiency is high. Generally, the friction coefficient of plain bearings is, while the friction coefficient of rolling bearings is only;

2. Rolling bearings have been standardized, serialized and generalized, suitable for mass production and high-quality, and are very convenient to use and maintain;

3. Rolling bearings are made of bearing steel and subjected to heat treatment, so rolling bearings not only have high mechanical properties and long service life, but also can save the most expensive non-ferrous metals used in the manufacture of sliding bearings;

4. The internal clearance of the rolling bearing is very small, and 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;

5. Some rolling bearings can bear both radial and axial loads, so the structure of the bearing support can be simplified;

6. Due to the high transmission efficiency and low heat generation of rolling bearings, the consumption of lubricating oil can be reduced, and lubrication and maintenance are more convenient;

7 Rolling bearings can be easily applied to shafts in any orientation of space.

In general, some needle roller bearings are damaged due to fatigue, while others are damaged due to poor lubrication, contaminants entering the bearings or improper disposal of the equipment.

Fine dust cleans the bearing and the surrounding environment, and the invisible fine dust is a powerful killer of the bearing, which can increase the wear, vibration and noise of the bearing.

Stamping is a powerful punch formed when the equipment is used, which is very likely to cause damage to the needle roller bearing, or use a hammer to directly hit the bearing, and transmit pressure through the tumbling body.

The impact of non-professional tool installation.

With the right and accurate equipment, you can avoid using things like cloth and staple fibers. Whether in the laboratory test or in the actual application, it can be clearly seen that the actual life of the needle roller bearing with the same appearance under the same operating conditions is very different.

Needle bearings are roller bearings with cylindrical rollers that are both thin and long relative to their diameter. Such rollers are called needle rollers. Despite the small cross-section, the bearings have a high load bearing capacity, and the needle roller bearings are equipped with slender and long rollers (roller diameter d 5mm, l state trillion d, l is the roller length), so the radial structure is compact, and its inner diameter and load capacity are the same as other types of bearings, and the outer diameter is the smallest, which is particularly suitable for support results where the radial installation size is limited.

According to different occasions of use, the bearing without inner ring or needle roller and cage assembly can be selected, at this time, the journal surface and the shell hole surface matched with the bearing are directly used as the inner and outer rolling surface of the bearing, in order to ensure that the load capacity and running performance are the same as the bearing with the ring, the hardness, machining accuracy and surface quality of the raceway surface of the shaft or shell hole should be similar to the raceway of the bearing ring. This type of bearing can only withstand radial loads.

I really want to have a manufacturer in Changzhou.

Needle roller bearings (NK, NKS, RN49, RN48, NKL, NKLS, NA49, NA48, RN69, NA69, RN49...)rs、rna49..2rs、na49..

rs、na49..2rs、rnao、nao）

The structure is compact, the radial size is small, the load capacity is large, and it can bear large radial load. This kind of bearing has a variety of structures and size series, the assembled G2 grade needle roller, the diameter change of the grouping batch is within 2um, in addition to the full needle roller bearing, all adopt high-performance cages, which can correctly guide the parallel axis of the needle roller.

The full needle roller bearings provided by the company adopt the dimensions and tolerances specified in the JB T3588-94 standard, which have a large bearing capacity and low cost, especially in some low-speed and swing load situations.

-Changzhou Enke Bearing Co., Ltd.