Ceramic Ball Bearings with high temperature resistance

Ceramic Ball Bearings with high temperature resistance, wear resistance, corrosion resistance, no mercy, electrical insulation, self-lubricating, high-speed and other features. Can be used in extremely harsh environments and special conditions, can be widely used in aviation, aerospace, marine, petroleum, chemical, automotive, electronics, metallurgy, electric power, textile, pumps, medical equipment, scientific research and national defense and military fields, is the application of new materials, high-tech products; Cylindrical roller bearing  nd rolling silicon nitride (SI3N4) or zirconia ceramic materials, maintaining PTFE, nylon 66, polyimide, stainless steel or special aviation aluminum, thus expanding the application of ceramic bearing surfaces. Such as: high-speed bearings, high temperature bearings, corrosion-resistant bearings, magnetic bearings, electrical insulation bearings. Is internationally recognized as the future of the mainstream products bearing, bearing market will occupy 40 to 60 percent share. Recent market of 10 billion, mainly used in high-speed machine tools, high-speed motor, cryogenic equipment, the current development and production of precision can be gradually replaced, the speed above all bearing in all applications.

For some high-precision bearings

You need higher speeds (ie, high-speed machining centers or internal grinding), you need to find a different bearing solutions.
For some high precision bearing, its clutch bearing  requirements is very high, today we have to introduce a configuration problem on precision bearings.
Precision bearings spindle traditional application areas, according to different processes, machine tool spindle have different requirements. In general, the lathe spindle is used at lower speeds and larger cutting metal cutting load. This type of spindle are usually transmitted through the pulley or gear drive torque. This means that the load on the drive end shaft is quite large.

Precision bearings Definition

Precision bearing Precision bearings according to ISO grading standards are divided into: P0, P6, P5, P4, P2. Successively higher level, where P0 is the general accuracy, other grades are precision level. Of course, different classification standards, different types of bearings, their classification method somewhat different, but the meaning is to the. The use of performance requirements of precision bearings rotating body with high runout accuracy, High speed Spindle and small changes in friction and friction.

Roundness error and there are four main methods.

roundness measurement error and there are four main methods.
① minimum zone method: the outline of an inclusive circle radius difference measured radius of the smallest difference of two concentric circles as roundness error.
② method of least squares the circle: circular contour corresponding to the measured points to the square of the distance and the circumference of the smallest circle center of a circle, made inclusive measured radius of two concentric circular contour difference is the roundness error.
③ Minimum circumcircle method: apply only to the outer. Inclusive test circle contour and a minimum radius of circumcircle center of a circle, a circle made inclusive measured two concentric contour radius difference is roundness error.
④ maximum inscribed circle method: apply only to the inner circle. Connected to the test within a radius of two concentric circular contour and circular contour difference between the measured radius of the largest inscribed circle center of a circle, simulation testing the roundness error is made inclusive.

double row and multi- sleeve bearing

Thrust needle roller bearings
Separated by a Precision bearing  raceway ring and needle roller and cage components , (WS) can be used with any combination punching thin raceway ring (W) or processing of thick -cut raceway ring . Non-separable bearings are precision stamping by a raceway ring and needle roller and cage assemblies maintain overall bearing constituted . This class can withstand axial load bearing . Small footprint , compact design in favor of mechanical , they use only the needle roller and cage assemblies , and the Bearing test machine mounting surface of the shaft and housing to use as a raceway .
The basic structure of the bearing inner ring with the NU -type cylindrical roller bearings the same , but because of the use of the needle , the volume can be reduced , and can withstand high radial load bearing without inner ring should have a suitable mounting surface accuracy and hardness of the shaft as raceway use .

insert ball bearing than other plain bearing is also characterized by double-sealed

insert ball bearing than other plain bearing is also characterized by double-sealed, because the use of environmental conditions are generally spherical ball bearings more demanding, especially agricultural machinery bearings even more, and double sealed to ensure that the dust is not easy to enter its channel interior the last two years, some companies have developed triple-lip seal of the spherical railway bearing dust will greatly enhance the ability to extend bearing life.

Bearing Accuracy Improvement Method

precision bearing After the bearing is installed in the host, as measured radially spindle runout, measured values can be found in each of its turn has some changes; continuous measurements can be found after after a certain number of revolutions, this change will be approximately repeated appears. This change in the index to measure the degree of circular rotation accuracy, approximately repeated changes in the number of revolutions required for precision rotation cycle on behalf of the "quasi-periodic", the magnitude of change in the quasi-periodic large amplitude, rotation accuracy is poor circulation .
If properly pre-load on the spindle, the speed gradually increased to close to the operating speed,Roller Bearings in order to implement "running" the role of bearing can improve the accuracy of the spindle rotation cycle.