Date: 2013-08-20

Full complement needle roller bearings with clearance to use and choose the direction should be considered

Full complement needle roller bearings to make precision parts, which requires the use of correspondingly cautious, not only changed using a high-performance bearings, if used improperly, they can not achieve the expected performance results, so use the following considerations bearing :
Keeping the bearing and its surroundings clean. Even smile invisible dust into the bearing, will increase the bearing wear, vibration and noise.
When using the installation carefully, do not allow a strong punch, does not allow a direct hit with a hammer bearing, not pass through the rolling pressure.
Use appropriate and accurate installation tools, make use of special tools, try to avoid using fabric and staple fibers and the like.
Prevent corrosion of bearings, bearing direct hand pick, to fully wash hands sweat, and coated with high-quality mineral oil before, during the rainy season and summer with particular attention to rust.
With choice
Full complement needle roller bearing inner diameter and outer diameter tolerances are manufactured in accordance with the standard, the bearing inner ring and the shaft, the outer ring and housing bore with the tightness of the journal can only be controlled housing bore tolerances and tolerances to be achieved. Bearing inner ring and the shaft hole basis with the use of the bearing outer ring and housing bore with the introduction of machine axis system.
With the correct choice, you must know the actual load bearing conditions, temperature and other requirements, and in fact it is very difficult. Therefore, in most cases is selected according refinements fit.
Load size
Between the ring and the shaft or housing over the load depends on the size of the win, the heavier the load using a larger amount over win, the lighter the load using a smaller amount over win.
Clearance is a full complement needle roller bearing can work as an important factor. Choose affordable move bearing clearance, you can move between the load distribution in the fair; able to limit the shaft (or housing) axial and radial displacement of the axis of rotation to ensure accuracy; bearings at the required temperature to work properly ; can reduce the bearing vibration and noise while working, etc. Thus, the bearing clearance on bearing life, temperature, vibration and noise have a great impact. In the choice of bearing clearance, in addition to the work should be considered bearing premise (such as load, speed, temperature, etc.) and the use of performance requirements of the bearing (eg friction torque, vibration and noise, rotation accuracy, etc.), should also be considered:
Maintaining full complement needle roller bearings and their environment clean even tiny invisible dust from entering the bearings move will increase the bearing wear, vibration and noise. Full complement needle roller bearings and their peripheral accessories should be kept clean, especially the dust and dirt, tools and working environment must be kept clean.
Really careful when using the installer did not promise a strong punch, does not agree with a hammer, a direct hit full complement needle roller bearings, does not allow the pressure to pass through the body move.
Use appropriate tools to make use of the correct installation of special tools, try to avoid using fabric and staple fibers and the like.
Full complement needle roller bearings to prevent corrosion of direct hands to take full complement needle roller bearings, to fully wash hands sweat, and coated with high-quality mineral oil and then manipulate the summer, especially during the rainy season, and pay attention to rust. However, the premise of a particular operation, the bearings can get a longer life of the conventional calculation, especially in the case of light load. These special manipulation premise is that when immobile surface (track and move items) is a lubricant film effectively separated and restrictions pollutants may lead to surface damage. In fact, under the premise of the ideal, the so-called permanent move bearing life is possible.

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