Structure and performance characteristics of fag bearing
Structure and performance characteristics of fag bearing
2022年5月14日
Technical analysis of engine sliding Koyo bearing
Technical analysis of engine sliding Koyo bearing
2022年5月14日

Precautions during the use of INA Bearing

Keep the INA Bearing and its surrounding environment clean as much as possible.

  • In addition to excellent quality, INA Bearing is also a very precise part. It is both a high-performance ina bearing. If it is not used properly in the process of use, it will not only fail to achieve the expected performance effect, but also easily damage the INA Bearing. Everyone must have paid attention to the lubrication. In addition to lubrication, what other aspects should be paid attention to in the use of INA Bearing.Precautions during the use of INA Bearing
  • When using and installing, be careful and do not allow strong stamping. If the INA Bearing of the motor has bad phenomena, the solution is not allowed to directly knock the INA Bearing with a hammer, and it is not allowed to transfer pressure through the rolling element.Precautions during the use of INA Bearing
  • Sodium base grease is generally used for the INA Bearing of the motor. Even if the invisible smile dust enters the INA Bearing, it will increase the wear, vibration and noise of the INA Bearing.Precautions during the use of INA Bearing
  • To prevent the corrosion of INA Bearing, when taking ina bearing directly by hand, fully wash the sweat from your hands and apply high-quality mineral oil before operation. Pay special attention to rust prevention in rainy season and summer. 
  • Under some special operating conditions, ina bearing can obtain a longer life than traditional calculation, especially under light load. Analysis on the mechanism and influencing factors of labyrinth seal of INA Bearing Box these special operating conditions are that when the rolling surface (track and rolling parts) is effectively separated by a lubricating oil film and the surface damage caused by pollutants is limited.
  • In fact, under ideal conditions, the so-called permanent ina bearing life is possible.use of INA Bearing
  • In addition to excellent quality, NSK bearing is also a very precise part. It is both a high-performance NSK bearing. If it is not used properly in the process of use, it will not only fail to achieve the expected performance effect, but also easily damage the NSK bearing.  use of INA Bearing
  • Everyone must have paid attention to the lubrication. In addition to lubrication, what other aspects should be paid attention to during the use of NSK bearing!use of INA Bearing
  • The use and installation shall be careful, and strong stamping is not allowed. The NSK bearing of the motor has bad phenomena. The solution is not allowed to directly knock the NSK bearing with a hammer, and the pressure is not allowed to be transmitted through the rolling element.use of INA Bearing
  • Use proper and accurate installation tools, try to use special tools, and try to avoid using cloth and short fiber.
  • Try to keep NSK bearing and its surrounding environment clean. Sodium base grease is generally used for motor NSK bearing. Even if invisible smile dust enters NSK bearing, it will increase the wear, vibration and noise of NSK bearing.use of INA Bearing

Prevent corrosion of use of INA Bearing

  • When taking NSK Bearings directly by hand, fully wash the sweat from your hands and apply high-quality mineral oil before operation. Pay special attention to rust prevention in rainy season and summer. Under some special operating conditions. 
  • NSK bearing can obtain a longer life than traditional calculation, especially under light load. Analysis on the mechanism and influencing factors of labyrinth seal of NSK bearing box these special operating conditions are that when the rolling surface (track and rolling parts) is effectively separated by a lubricating oil film and the surface damage caused by pollutants is limited.use of INA Bearing
  • In fact, under ideal conditions, the so-called permanent NSK bearing life is possible.use of INA Bearing
Precautions during the use of INA Bearing

Use proper and accurate installation tools,use of INA Bearing

  • The hardness of the heat-treated workpiece shall be tested with a hardness tester. Phr series portable surface Rockwell hardness tester is very suitable for testing the hardness of surface heat-treated workpieces.Precautions during the use of INA Bearing
  •  It can test various surface heat-treated workpieces with an effective depth of more than 0.1mm. The utility model has the advantages of simple operation, convenient use and low price, and the hardness value can be read directly.Precautions during the use of INA Bearing
  • Surface heat treatment is divided into two categories: one is surface quenching and tempering heat treatment, which uses vibration absorption or vibration isolation devices to reduce fag bearing noise or isolate fag bearing noise; the other is chemical heat treatment, and its hardness test methods are as follows:Precautions during the use of INA Bearing
  • Chemical heat treatment is to infiltrate one or more atoms of chemical elements into the workpiece surface, so as to change the chemical composition, structure and properties of the workpiece surface. After quenching and low-temperature tempering, the surface of the workpiece has high hardness, wear resistance and contact fatigue strength, while the core of the workpiece has high strength and toughness.Precautions during the use of INA Bearing
  • The main technical parameters of chemical heat treatment workpiece are hardened layer depth and surface hardness. The depth of hardened layer shall be tested by Vickers hardness tester. Check the distance from the workpiece surface to the point where the hardness drops to 50HRC. This is the effective hardening depth
  • The surface hardness test of chemical heat treatment workpiece is similar to that of surface quenching heat treatment workpiece. One kind of rolling fag bearing noise is generated by fag bearing itself, which can be tested by Vickers hardness tester, surface Rockwell hardness tester or Rockwell hardness tester. Precautions during the use of INA Bearing
  • However, the thickness of nitriding thickness is relatively thin, generally no more than 0.7mm. At this time, Rockwell hardness tester can no longer be used.Precautions during the use of INA Bearing
  • If the local hardness requirements of parts are high, local quenching heat treatment can be carried out by means of induction heating. For such parts, the location of local quenching heat treatment and local hardness value shall be marked on the drawing.Precautions during the use of INA Bearing
  •  The hardness test of parts shall be carried out in the designated area. The hardness testing instrument can use Rockwell hardness tester to test the HRC hardness value. If the heat treatment hardened layer is shallow, the surface Rockwell hardness tester can be used to test the hrn hardness value.Precautions during the use of INA Bearing
  • Many customers may sometimes have such questions when using NTN bearings. High speed NTN bearings require the rotary system where NTN bearings are located to undergo precise dynamic balance. Why do some NTN bearings have cages and some NTN bearings have no cages.Precautions during the use of INA Bearing
  • NTN bearing is divided into two structures with cage and without cage. Among them, large NTN bearings are generally required to bear a large load, often without cage, but filled with rolling elements between the inner and outer raceways. Most small and medium-sized rolling NTN bearings have cages.Precautions during the use of INA Bearing
  • In the machining process of NTN bearing, the configuration of NTN bearing also has a great impact on the rigidity of NTN bearing. How do the outer ring, inner ring, rolling element and cage of NTN bearing fit together. To put it simply, first place the inner and outer rings of the NTN bearing, place the inner ring next to the side, then place the rolling element (put it aside), then adjust the position of the rolling element, and then place the cage.Precautions during the use of INA Bearing
  • Cage is also involved in the processing of NTN bearing, so what is the main function of NTN bearing cage?

The purpose of the cage is:Precautions during the use of INA Bearing

  • Single row centripetal ball NTN bearing and short cylindrical roller NTN bearing have low noise varieties for motor NTN bearing, and drive the rolling body to roll on the correct raceway;Precautions during the use of INA Bearing
  • The cage separates the rolling elements at an equal distance and evenly distributes them on the circumference of the raceway to prevent mutual collision and friction between the rolling elements during operation;
  • In the separated NTN bearing, the rolling element and a ferrule are combined to prevent the rolling element from falling off.Precautions during the use of INA Bearing
  • NTN bearing is called window, which is used to isolate and the rolling element. At low speed, the actual situation of the passing vibration of the steel ball in the ball NTN bearing is basically consistent with the theoretical calculation value. Precautions during the use of INA Bearing
  • The pocket clearance makes the cage have a certain amount of activity in the radial and axial directions. The total amount of activity in the radial direction is called the clearance of the cage. In roller cage, there are many structural types and complex shapes. Precautions during the use of INA Bearing
  • There are many pockets with equal distance on the cage. The pocket shape includes spherical, circular, elliptical, rectangular and tooth shape. Its size is larger than the size of the rolling body. The difference between the two is the pocket gap. Sometimes the connecting part between the windows of the rolling cage is called lintel, which plays the role of connecting and increasing the strength of the cage.Precautions during the use of INA Bearing

Precautions during the use of INA Bearing

  • The market requirements for various mechanical devices and instruments using rolling bearings are becoming more and more strict, and the conditions and performance required for Koyo bearings are becoming more and more diversified. In order to select a suitable Koyo bearing from a large number of structures and sizes, it needs to be studied from various angles. 
  • When selecting Koyo bearings, generally, the structure of Koyo bearings is roughly determined by considering the difficulty of arrangement, installation and disassembly of Koyo bearings as shaft system, the allowable space and size of Koyo bearings and the marketability of Koyo bearings. 
  • Secondly, the design life of various machines using Koyo bearings and various durability limits of Koyo bearings are compared and studied, and the size of Koyo bearings is determined. When selecting Koyo bearings, it is often inclined to only consider the fatigue life of Koyo bearings. 
  • The grease life, wear and noise caused by grease aging also need to be fully studied. In addition, according to different purposes, it is necessary to select Koyo bearings specially designed for accuracy, clearance, cage structure, grease and other requirements. Precautions during the use of INA Bearing
  • However, there is no certain sequence and rules for the selection of Koyo bearings. Priority should be given to the conditions, performance and related matters required by Koyo bearings, which is particularly practical. Identification of radial ball bearing
  • For centripetal ball bearings in normal technical condition, the inner and outer race raceways shall be free of spalling and serious wear marks, and shall be in a bright arc groove; All balls shall be kept round without spots, cracks and spalling on the surface; Precautions during the use of INA Bearing
  • The cage shall not be loose, broken or worn through. When using one hand to hold the inner ring and the other hand to quickly push the outer ring to rotate, it is required to rotate stably. Only the slight sound of the ball rolling on the raceway can be heard without vibration; Precautions during the use of INA Bearing
  • The speed shall be reduced gradually when stopping, and there shall be no reverse after stopping. For normal radial ball bearings, the clearance between the inner and outer rings and the rolling element is 0.005-0.010mm. When shaking the inner and outer rings along the radial direction, there shall be no clearance.Precautions during the use of INA Bearing
  •  The used NTN bearing can shake the inner ring several times along the axial direction by hand. When there is an obvious sound between the outer ring and the ball, it indicates that the matching clearance exceeds 0.03mm and should not be used again.Precautions during the use of INA Bearing

Identification of tapered  use of INA Bearing

  • After the NTN bearing is used, check whether the rolling element and the inner ring raceway are peeling off, whether the cage is too loose, whether the front and rear edges of the inner ring are complete, and whether the outer ring raceway is cracked. After the inner ring and roller assembly are installed into the outer ring, the roller shall fall into the middle of the raceway and move forward no more than 1.5mm. One of them is unqualified, that is, it cannot be used.
  • Identification of self-aligning roller bearings and short cylindrical roller bearings
  • The outer ring of this kind of NTN bearing is separable. Under normal conditions, the inner and outer race raceways and rollers shall be free of breakage, pitting and deep wear marks; The cage shall be free of deformation and can fold the roller on the inner ring; The fit clearance between inner and outer race raceways and rollers shall not exceed 0.06mm.
  • Thrust ball bearing qualification
  • Under normal conditions, the two raceways shall be free of peeling damage and serious wear, and the ball shall be free of breakage and pitting; The cage shall be free from deformation and collision with the two raceway washers, and the balls shall be firmly folded together
  • Cleaning: when removing IKO bearing for inspection, first make appearance records by photography and other methods. In addition, confirm the amount of remaining lubricant and sample the lubricant before cleaning IKO bearing. use of INA Bearing
  • The cleaning of IKO bearing is divided into rough cleaning and fine cleaning, and the metal grid can be placed at the bottom of the container. use of INA Bearing
  • During rough cleaning, use a brush to remove grease or adhesion in the oil. At this time, if the IKO bearing is rotated in oil, pay attention to the damage to the rolling surface due to foreign matters. use of INA Bearing

During fine cleaning, turn  use of INA Bearing

  • The commonly used cleaning agent is neutral water-free diesel oil or kerosene, and sometimes warm lye is used as needed. No matter what kind of cleaning agent you use, always filter it and keep it clean. After cleaning, coat IKO bearing with antirust oil or antirust grease immediately.
  • Inspection and judgment
  • In order to judge whether the removed IKO bearing can be reused, its dimensional accuracy, rotation accuracy, internal clearance, mating surface, raceway surface, cage and sealing ring should be emphatically checked.
  • The judgment criteria vary according to mechanical properties, importance and inspection cycle. IKO bearing shall not be reused and must be replaced in case of the following damage.
  • Fracture and defect of IKO bearing parts.

 use of INA Bearing surface of the raceway surface.

  • When the IKO bearing rotates, the raceway surfaces of the inner and outer rings of the IKO bearing are in rolling contact with the rolling element, so the running track is a dark surface. The running track attached to the raceway surface is not abnormal, so the load conditions can be known. Therefore, when disassembling the IKO bearing, please pay close attention to and observe the running track of the raceway surface.
  • If you carefully observe the running track, you will know that it only bears radial load, large axial load, moment load, or extreme uneven rigidity on IKO bearing housing. It can be checked whether the IKO bearing is added with unexpected load and installation error, and become a clue to investigate the cause of IKO bearing damage.
  • The preloading methods of rolling ina bearings are divided into radial preloading method and axial preloading method, which are briefly introduced as follows:

Radial preloading method  use of INA Bearing

  • The radial jacking method is mostly used in tapered bore ina bearings bearing radial load. A typical example is double row precision short cylindrical roller ina bearings. The axial position of this ina bearing relative to the tapered journal is adjusted by nuts to make the inner ring have appropriate expansion and obtain radial negative clearance. This method is mostly used in machine tool spindles and jet engines.
  • Axial preloading method
  • Axial preloading method can be divided into positioning preloading and constant pressure preloading.
  • In the positioning preload, the appropriate preload can be obtained by adjusting the size of bushing or gasket; The appropriate preload can also be adjusted by measuring or controlling the starting friction moment; The purpose of preloading can also be realized by directly using the paired duplex ina bearings with pre adjusted preload. At this time, it is generally not necessary for the user to adjust.  use of INA Bearing
  • In short, the relative position of ina bearings with axial preload will not change during use. Constant pressure preloading is a method to properly preload INA Bearing with coil spring, Belleville spring, etc. The rigidity of the preload spring is generally much smaller than that of the INA Bearing, so the relative position of the INA Bearing preloaded under constant pressure will change in use, but the preload is roughly the same. use of INA Bearing

The comparison between positioning preload and constant pressure preload is as follows: use of INA Bearing

  • When the preload is equal, the positioning preload has a greater effect on the increase of the rigidity of INA Bearing, and the influence of the rigidity change on the load of ina bearing is much smaller.Precautions during the use of INA Bearing
  • During the use of positioning preload, the axial length difference caused by the temperature difference between the shaft and ina bearing seat, the radial expansion caused by the temperature difference between the inner and outer rings and the displacement caused by load will change the preload; In the use of constant pressure preloading, the change of preloading can be ignored.