Wednesday 28 May 2014

Ranges of Bearings - Characteristics and Applications

Bearings are used in mechanical machines which are used to avoid the friction and also without this we would be replacing the spare parts constantly. Bearings work as a roller, that if the two surfaces can roll over each other, the friction is greatly reduced. But if a thing slides, then there will be more force which cause a friction and may slow down. For example, if your cycle is designed based on slide movement, then it takes force to move and slow down, but if it is designed mechanically with bearings, it rolls over each other and the friction is avoided.

Bearings qualities are based on its efficiency, consistency, reliable and ability hold the load and force. These bearings are lubricated for high performance and enhance its efficiency, were it can be lubricated by grease or oil depending on the equipment and its user.

There are different types of bearings which are used in different products like automobiles, tools for construction, machines, DVD players, ceiling fans and refrigerators. Due to these bearings the devices are able to run, rotate. Based on the customer requirement the bearing manufacturers customize and produce the bearings.

Types of bearings are deep grove ball bearings, Needle bearings, Pillow block unit, Thrust ball bearings, Angular contact ball bearings, Self aligning ball bearings, Spherical roller bearings, cylindrical roller thrust bearings, Spherical roller thrust bearings.

* Ball bearings:
These bearings are used to reduce the rotational friction between two body parts. They are been used in various equipments, machineries, hardware and in some home based objects.

 * Needle bearings:
Needle bearings are bearings which are used to reduce the frictions of a rotating surface. It is also featured with greater rigidity, lower inertia forces that facilitate size and weight reductions in machinery. They perform well under severe conditions and interchange with sliding bearings. It is mostly used in farm and construction equipment, gear pumps, gasoline engines, and other engine components. It is lubricated with oil, which enhance the longevity and smoothness of the bearing.

 * Pillow block unit:
Pillow block unit is a mounted or roller bearings which are composed of insert bearing installed in a special housing. This bearings can easily adjust the machine alignment error or if needed its shaft to be bent in a certain angle. It is also convenient for assembling and dismantles the bearing. The most important thing is to lubricate the bearing, as there a certain kind of oil that is used to keep it working properly.

* Thrust ball bearings:
The Thrust ball bearings are mainly used to carry the axial load only, as when a load is properly applied to this bearing, the internal contact points get aligned on a plane parallel to the shaft. Also we supply two types of bearings: Single direction Thrust ball bearing and bi-directional Thrust ball bearing.
The single direction bearings can bear axial load in one direction and locate shaft axially in one direction, but the bi-directional bearings can support loads in both directions.

* Angular contact ball bearings:
Angular contact ball bearings are designed with a contact angle which can sustain with both axial loads in one direction together with radial loads in an oblique path. The larger the contact angle the higher the axial load support, but lower the radial load. This bearing is designed to use in high speed, high accuracy applications.

* Self aligning ball bearings:
Self-Aligning Ball Bearings which are used for the applications where extensive shaft deflections or misalignment are to be expected and a significantly longer service life. This bearing has two rows of balls and a common concave sphere raceway in the outer ring which allows angular misalignment of the shaft relative to the housing. It is featured with high productivity, extremely low friction, lower noise level, reduced vibration levels, user friendly and with lower maintenance.

 * Spherical roller bearings:
The spherical rollers bearings can self align by the spherically formed outer ring raceway and have higher friction than any other bearings. These bearings are suitable to hold high radial loads and also have capacity to carry lower axial load in two directions. Also they are mainly used in applications where extreme misalignment, shocks, vibrations, high speed or critical application stresses occur. 

* Cylindrical roller thrust bearings:
Cylindrical roller thrust bearings are individual components that can be mounted separately. They are single direction bearings and are used to accommodate high axial load in one direction with moderate speed. As this bearing is used in higher speed applications they require oil lubrication. This bearing is very rigid and requires little axial space.

* Spherical roller thrust bearings:
Spherical roller thrust bearings are used to transmit the load from one raceway to the other at an angle to the bearing axis. This bearing is separable and has self aligning capability. It is particularly suitable to accommodate radial loads in addition to acting axial loads in two directions simultaneously.

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