Rolling and Sliding Contact Bearings

Introduction

Bearing is a mechanical tool that is generally used to reduce the friction in between rotating parts and allow a relative motion in there. Two types of bearing such as rolling contact and sliding contact all act as moderate or low-speed applications. A good and well-structured bearing always expects some basic functions that ensure a free rotation and the minimum friction has been there. Moreover, it provides support for all the rotating parts to move in the right position and transmit a mechanical force so that the machine is running smoothly and all parts of the machine can act in a general way. 

Sliding contact bearing: Overview

There are various types of bearings and in between these depending on its friction type it can be classified into two contact bearings. Sliding and Rolling contact bearing.

Sliding contact bearing is also well-known as journal bearings, sleeve bearing, and plain bearing. This type of bearing is generally used for shaft slides which have been applied over the bush surface and result in friction or wear. To reduce this friction the rotating surface has been separated through a lubricating oil. The bush is also made with a special metal such as white metal and bronze. Sliding bearings also have two types and it is based on lubrication which has been applied in sliding bearings. These two are Hydrodynamic-lubrication bearings and Hydrostatic-lubrication bearings. Hydrodynamic bearing is generally working that relies upon a film of oil which develops the space for a good rotation of the spindle which it is running. Basic hydrodynamic bearing is generally journal bearing. Whereas, Hydrostatic bearing works on the principle of the sliding surface where pressurized fluid such as oil and any other kinds of lubricant or air has been used to create a gap in between two surfaces and for that both rotating parts can easily move.

Rolling contact bearing: Overview

Rolling contact bearing or anti-friction bearings are always used as a rolling element to reduce the friction and both parts can be rotated easily as well as there a little amount of friction has been generated. For that reason, it is well-known as simple ball bearings. This type of bearing has been classified into different classes. These all basically depend on their mechanical work and using purposes such as cylindrical roller bearing, self-aligning bearing, spherical or roller bearing, cylindrical roller bearing, deep groove bearing, Taper, and Thrust ball bearing. To replace the heavy load roller bearing is the best example for which a low amount of friction has been created and the object can easily transfer from one place to another. Shaft-self-aligning, medium load, and in high-speed application Rolling bear is most important to complete the process. 

Application and examples of sliding and rolling contact bearing

Use of Sliding bearings with examples

Rope conveyors, concrete mixtures, and marine installation in these all kinds of sectors Sliding bearing is the best example to carry on the process to reduce the friction level. Also, gas turbines and steam, huge sizes of electric motors, centrifugal pumps, and crankshaft bearings that are contained in diesel and petrol engines in these all applications Sliding bearing has been used to continue the workflow smoothly. Sledding, pushing any objects across the surface, opening a window in these all cases sliding bearing has been used.

Application of roller bearings with examples

Cane hooks, rope shaves, and hoisting dump in these all sectors using Rolling bearings are the best example. Moreover, in the small size of electric motors, gearboxes, rare and front axle of automobiles as well as in spindle machine tools, Roller ball bearings have been used to reduce the friction to rotate the machine smoothly. Also, to replace the heavy load from one place to another Roller bearings have been used for which with a minimum workload those objects can easily transfer. Skateboards, bicycles, blenders, DVD players in these all sector rolling bearings have been used.

Conclusion

Ball-bearing is a useful tool that reduces the friction rate in a machine and it also provides a relative motion for which the machine is running smoothly and can rotate all parts without any disturbing. This ball bearing can get in two different types of structure yet their working approach is the same by reducing friction and continuing running the machine. Sliding bearings and Roller bearings are normally seen in many sectors to fix the friction in the machinery parts. Sliding bearings are applied in the sliding surface to replace heavy load whereas rolling bearings have been used in round surfaces such as DVD players and bicycle motors.