The advantages of rolling bearings:
1, small frictional resistance, small power consumption, high mechanical efficiency, easy to start.?
2, size standardization, interchangeability, easy to install and dismantle, easy maintenance.?
Disadvantages of rolling bearings:
1, the structure of the bearing housing is more complex.?
2, even if the bearings are well lubricated, correctly installed, dust and moisture tight, normal operation, and ultimately because of rolling contact surface fatigue and failure.
Linear bearing advantages:
1, linear bearing structure is compact, because of its material reason weight is also relatively light, axial size is very small.
2, high precision, high speed but low wear, so can be used for many years without worrying about damage.
Disadvantages of linear bearings:
1, noise. Linear bearings in use will produce a relatively large noise, so you need to stay away from the city to use.
2, the structure of the bearing housing is complex. This will affect the later maintenance and the use of easy failure.
Expanded Information:
One, the application of linear bearings
Linear bearings are more and more widely used in electronic equipment, food machinery, packaging machinery, medical machinery, printing machinery, textile machinery, machinery, instrumentation, robotics, tooling machinery, numerical control machine tools, automotive and digital three-dimensional coordinate measuring equipment and other precision equipment or special The machine industry.
Two, ball bearing performance
Keeper hardness compared to the ball and ring low, its material has metal (such as: carbon steel, aluminum alloy) or non-metallic (such as: teflon, PTEF, polymer materials). Rolling bearings (rolling bearing) than journal bearings (journal bearing) rotation friction resistance is small, so the same speed, due to friction generated by the temperature will be lower.
Ball bearings are generally used in low load mechanical transmission equipment. Because the ball bearing bearing area is small, in the case of high-speed operation is very easy to serious mechanical damage, so in the heavy load mechanical transmission often take needle roller bearings in order to increase the bearing surface, improve the mechanical transmission efficiency, while reducing mechanical damage.
Ball bearings change the bearing friction mode, the use of rolling friction, this way more effectively reduce the friction between the bearing surface phenomenon, enhance the service life of the fan bearings, but also so that the service life of the radiator will be extended. The disadvantage is that the process is more complex, the cost is increased, and also brings higher working noise.
Baidu Encyclopedia - Linear Bearing
Baidu Encyclopedia - Ball Bearing