Date: 2013-08-22

INA bearing rotation flexibility

Measurement INA bearings rings and rolling elements and their contact elastic deformation, deformation is the cause of error factors, its contact with the measuring force, and rolling elements related to the location of the State.
INA bearing rotational flexibility in horizontal position checked, usually to fix the inner ring (or handheld) by hand, rotate the outer ring, check for abnormal noise bearing rotates and blocking. Generally speaking, bearing long to rotate, stop slow, flexibility is good. In contrast, rotation time is short, stop suddenly, flexibility is not good. Because of different bearing type and size, rotate it flexibility should also have different requirements. Like separate centripetal ball bearing, and separate centripetal thrust ball bearing, due to scroll body and rings Zhijian of contact area small, these INA bearing rotating Shi on comparison brisk, and double column centripetal spherical bearing and thrust roll child bearing, due to scroll body and roll road of contact area larger, patrons ring of weight and smaller, in check its rotating flexibility Shi, although plus must load, but its brisk degree still than separate centripetal ball bearing. For large bearings, when you rotate it should be is not stuck, and no check for General rotation sound.
Large machinery cannot be rotated manually, so no load starting immediately after cutting off power, machine idling, check whether there is no vibration, noise, and rotating parts in contact to confirm after no exception, according to the external temperature of the housing speculation. But the temperature measurement of bearing outer ring with holes directly is more accurate. Bearing temperature, work gradually began to rise, usually temperature-stable after 1-2 hours. If adverse bearing installation, temperature rises dramatically, unusual high temperatures. Its causes, such as excessive grease, the bearing clearance is too small, poor installation, excessive seal friction. High speed rotation, bearings, lubrication and a cause, such as selecting the wrong way.  

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