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Sheave Size

Sunday, March 28th, 2010 | Energy | No Comments

Sheave Size

Needle Roller Bearing

As we can see, with the quick development of the economy, there are more and more cars and other transportation vehicles on the streets. But have you ever wondered that how these machines run? It is no wonder that these machines are composed of many different kinds of mechanical parts, among which the bearings are very important.

Of course, there are also numerous types of bearings. And needle bearing is one important kind. It is also called needle roller bearing. How does this kind of bearing get its name? The needle roller bearing derives its name because of the presence of thin, long cylinders which are comparable to the needles that we use in sewing. It is a bearing which uses small cylindrical rollers. They are used to reduce friction of a rotating surface.

When compared to the ball bearings, the needle roller bearings have a larger surface area that is in contact with the bearing outer surfaces. Besides, they are much more compact than the ball bearings. Needle roller bearings are very skinny cylinder roller bearings and have less rolling mass and materials to change size so that they can be a more precision bearing.

As a significant bearing category, the needle roller bearing has many typical features. It has a low cross section which has a high load carrying capacity, That is to say, this kind of bearings has lower height of cross section and higher carrying capacity. Besides, it embodied with the features of rather high capacity of lubrication, gently weight and high rigidity. Moreover, in many special situations such as high rotation speed, high impacting load, it can still be used to meet the high requirement.

Needle roller bearings can be applied in numerous places. They can be widely used in the machinery such as the agricultural machinery, industrial sewing machine, the construction tools and the material handling equipment. Additionally, they are also commonly applied in the transportation vehicles such as the cars, buses, electric bicycle and the aircrafts. The needle roller bearings are also very helpful in some other places which we are not very familiar with. For example, Hydraulic pumps, sheave blocks and hoist drum shaft.

According to the above content, we can get a main idea of the needle roller bearing. It is indeed a very important kind of bearing. And it has very extensive usage. Having a basic idea about it will help you a lot in this field.

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