How Bearings Work

NINGBO SUNTHAI BEARING CO.,LTD SUNTHAI^® F&F^®
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Post by ffbing, 2010-7-19, Views:

Have you ever wondered how things like inline skate wheels and electric motors spin so smoothly and quietly? The answer can be found in a neat little machine called a bearing.

The bearing makes many of the machines we use every day possible. Without bearings, we would be constantly replacing parts that wore out from friction. In this article, we'll learn how bearings work, look at some different kinds of bearings and explain their common uses, and explore some other interesting uses of bearings.

The Basics

The concept behind a bearing is very simple: Things roll better than they slide. The wheels on your car are like big bearings. If you had something like skis instead of wheels, your car would be a lot more difficult to push down the road.

That is because when things slide, the friction between them causes a force that tends to slow them down. But if the two surfaces can roll over each other, the friction is greatly reduced.

Bearings reduce friction by providing smooth metal balls or rollers, and a smooth inner and outer metal surface for the balls to roll against. These balls or rollers "bear" the load, allowing the device to spin smoothly.

Bearing Loads

Bearings typically have to deal with two kinds of loading, radial and thrust. Depending on where the bearing is being used, it may see all radial loading, all thrust loading or a combination of both.

The bearings that support the shafts of motors and pulleys are subject to a radial load

The bearings in the electric motor and the pulley pictured above face only a radial load. In this case, most of the load comes from the tension in the belt connecting the two pulleys.

The bearings in this stool are subject to a thrust load

The bearing above is like the one in a barstool. It is loaded purely in thrust, and the entire load comes from the weight of the person sitting on the stool.

The bearings in a car wheel are subject to both thrust and radial loads

The bearing above is like the one in the hub of your car wheel. This bearing has to support both a radial load and a thrust load. The radial load comes from the weight of the car, the thrust load comes from the cornering forces when you go around a turn.

NINGBO SUNTHAI BEARING CO.,LTD

TEL:+86-0574-87222434 87220319 87220519(EXT)8008

FAX:+86-0574-87223781

ADD:NO.1730 LIYUAN NORTH ROAD, NINGBO, CHINA

E-MAIL:stb02@sunthaibearing.com

WEBSITE: www.sunthai.com.cn www.sunthaibearing.com SUNTHAI F&F BEARINGS

SUNTHAI NON STANDARD BEARING WEBSITE:www.fbearing.com

More products from SUNTHAI Series of Miniature Ball Bearing Series of Deep Groove Ball Bearing Plane Thust Bearings Series of Linear Bearing Center-Adjustable and Angular Contact Ball Bearing Needle Roller Bearing Cylindrical (Taper) Roller Bearings Centripetal Joint Bearing Non-Standard Ball Bearing

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