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Calculation of axial clearance of tapered roller bearing

wallpapers Tech 2020-06-10
Tapered roller bearings mainly bear radial and axial combined loads. Carrying load capacity depends on the raceway angle of the outer ring, the higher the corner, the greater the load capacity. This type of bearing is a separate bearing. It is divided into single-row, double-row and four-row tapered roller bearings according to the number of rows of rolling elements in the bearing.
Tapered roller bearings

Single row tapered roller bearing clearance needs to be adjusted by the user during installation;
 
 The outer ring (or inner ring) of double row tapered roller bearings is a whole. The small end faces of the two inner circles (or outer rings) are similar, there is a spacer ring in the middle, and the thickness of the spacer ring adjusts the clearance;
 
 Four-row tapered roller bearings. The performance of this type of bearing is the same as that of double-row tapered roller bearings. Still, it has a higher radial load than double-row tapered roller bearings and slightly lower limit speed. It is mainly used for heavy machinery.
 
However, the technical samples of the primary bearing manufacturers only have the radial clearance table of the tapered bearing. Is the axial clearance of the tapered bearing not bulky? Of course not.
 
On the rolling mill, the axial clearance of the tapered bearing can determine the axial displacement of the roll. In rolling seamless steel tubes, the axial clearance of the tapered bearing is an important parameter to control the pass process.
 
Through the Pythagorean theorem, we use the known radial clearance (BC) and the measurable contact angle α of the outer ring raceway to calculate the axial clearance (AB) we need.
 
 Axial clearance = radial clearance ÷ TAN (α)
 
Example: A tapered bearing with a radial clearance of 0.24mm and an outer ring raceway angle of 12°. Apply the above formula to calculate:
 
        Axial clearance=0.24÷tan12
 
        The axial clearance is: 1.129mm

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