FAG bearing equipment: fixed support with two ends

Source: China Bearing Network Time: 2014-02-17

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The fixed support of the two ends is usually composed of two symmetrically placed angular contact ball bearings or tapered roller bearings. The device axially regulates a ferrule of the bearing; until a suitable clearance or required preload is obtained. Bearings are uniquely suited for applications where high axial requirements are required; for example, machine tool spindle bearings with helically toothed bevel gear shaft bearings. In principle, these bearings can be either O-type or X-selective.
The cone pole S (ie, the middle of the load effect) formed by the extension line of the touch point connection of the O-type bearing is on the outside of the bearing set; and the S point of the X-type bearing is on the inside of the bearing set. The middle of the two load effects of the O-type bearing The interval between them is larger than the type; the skew caused by the gap is smaller than the X type.
It is necessary to consider thermal expansion when setting the axial clearance. The temperature gradient from the shaft to the housing in the X-type equipment always reduces the bearing clearance.
On the contrary; the O-type placement method has three different conditions. When the tumbling cone pole R; that is, the bearing outer ring raceway extension line coincides with the bearing intermediate line; the bearing clearance can be ensured under the above conditions. The effect of thermal expansion.
When the two bearings are close to each other; the roller cone poles R are intertwined; the axial clearance of the bearing will decrease with the addition of thermal expansion. When the two bearings are spaced apart; the roller cone poles R do not intersect; the axial clearance of the bearing will Increase with the addition of thermal expansion.

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