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Date: 2013-08-06

Mounting of thrust bearings

Mounting of thrust bearings
Angular contact ball bearings and deep groove ball bearings used as thrust bearings must not be loaded
radially. Therefore the chock bore is usually 0,6...1,5 mm larger than the bearing outside diameter.
This may produce a radial displacement of the outer ring so that only the upper balls carry
the thrust load. To prevent this,the fitter should bring the rolls,complete with chocks and radial
bearings, into working position.
In this position, the center lines of the radial bearing inner rings are offset radially in relation to the
outer ring centre line by half the radial clearance. The thrust bearings are then installed in this position.
To enable the outer ring to radially align under axial load, the cover bolts are tightened only slightly
and then locked in this position.
Spherical roller thrust bearings are axially preloaded by means of springs; they are used primarily in
work rolls. There must be sufficient radial and axial clearance between outer ring and housing .
The cups of double-row tapered roller bearings with a large contact angle are also axially adjusted by


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