Structural features: the outer diameter of the outer ring of the outer spherical bearing is spherical, which can realize the centering in the concave spherical surface of the bearing seat. The inner ring of some external spherical bearings is designed to be lengthened, which can reduce the inclination of the inner ring on the shaft and make the operation more stable. At the same time, the bearing is usually equipped with sealing devices on both sides, which can effectively prevent the dirt from invading, and the outer ring is generally equipped with two lubrication holes for lubrication.
Classification: according to the fitting mode with the shaft, it can be divided into three categories: spherical ball bearing with jack screw, spherical ball bearing with taper and spherical ball bearing with eccentric sleeve. Outer spherical ball bearing with jack screw is fixed on the shaft by jack screw. Common models include UC200 series and UC300 series; Tapered hole with taper outer spherical ball bearing with inner diameter of 1:12 taper shall be used in conjunction with the tightening sleeve, such as UK200 series and UK300 series; The outer spherical ball bearing with eccentric sleeve is fixed with the shaft through the eccentric sleeve, and the main models are UEL200 series, UEL300 series, etc.
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