Date: 2013-08-20

INA bearing clearance and rotational flexibility test methods

INA bearing swivel flexibility generally in a horizontal position check, usually the inner ring fixed (or handheld inner), rotate the outer ring by hand to check whether there are abnormal bearing rotation noise and blocking phenomenon. In general, the duration of bearing rotation length, stop slow, flexibility like. Conversely, a short rotation time, stop suddenly, flexibility is good. Due to bearing structure type and different sizes, the flexibility of its rotation should have different requirements. Such as single row radial ball bearings, single row angular contact ball bearings, rings due to rolling contact between the body and the area is small, these bearings are rotated relatively light, while the double row radial spherical roller bearings and thrust bearings, due to rolling element and raceway contact area is large, while the outer ring has a smaller weight in check when its rotation flexibility, though with a certain load, but are not as brisk single row radial ball bearings. For large bearings, when it rotates, there should be no stuck phenomenon, but generally not the rotary sound check.
For tapered bore bearings supplementary examination following ways INA Bearing rotation flexibility, as follows:
The tapered bore bearings pressed into the mandrel until the plus certain radial preload, in this pre-load, when a ring is rotated to listen to a rolling body should be rotated. If the slide instead of rolling rotation, then the ferrule geometry defects or excessive rolling uneven size, INA Bearing rotation flexibility is also poor.

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