What is the Double Row Spherical Roller Bearings Radial Clearance?

Double row spherical roller bearings theory radial clearance is also called original radial clearance, is the radial clearance before bearing installation, for outer ring raceway contact diameter minus inner ring raceway contact diameter minus 2 times rolling body diameter. The standard given in the general are the original clearance value.

Double row spherical roller bearings installation clearance system bearing in the bearing after installation of radial clearance. Bearing installed to the shaft and bearing seat after due to interference fit, inner ring expansion, outer ring contraction, resulting in radial clearance reduced. Installation clearance for theoretical radial clearance minus the inner ring and shaft fit caused by the clearance reduction (approximate to take for its fit interference amount of 80%) and then minus the outer ring and bearing seat fit caused by the clearance reduction (approximate to take for its fit interference amount of 70%). Also consider the installation part surface roughness and shaft for hollow shaft when the original clearance influence.

Double row spherical roller bearings work radial clearance is bearing in the actual operating conditions of the clearance. Bearing in the work, due to the inner and outer ring temperature difference causes the installation clearance to reduce, and work the role of the load so that the rolling body and the ring to produce elastic deformation leads to the original clearance increases, work clearance for the installation clearance minus due to inside and outside the sleeve temperature difference caused by the clearance reduction and due to the inner ring high speed rotation caused by the clearance reduction amount and, plus due to the load caused by the clearance increment. Long-term use of experience shows that, in general, work clearance is always greater than the installation clearance, and must be less than the original clearance. For the bearing, the most important is the installation clearance.

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