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1. secondary objective to preload: preload secondary objective and representative cases of women able to cite some examples to permit clear out:
(1) is exactly the decision purpose of radial and axial purposes at the same time, raises the shaft runout.
(2) increase the stiffness of the bearing. From the axis of the machine tool bearings, INA bearings for differential mechanism pinion by bike.
(3) purpose of preventing axial vibration and resonance and formation of homonym. Small motor bearing.
(4) raise the rolling reverse sliding, orbital rotation and sliding the sliding. High-speed reverse radial spherical plain thrust bearing, thrust ball bearing.
(5) to pick up rings, accurate to link the rolling elements. Thrust ball bearings, thrust spherical roller bearing women, when by level-axis.
2. preload: position preload is on Germany INA bearing purposes, are using the preload will not change. There can for example stated:
(1) in order to implement the preload in advance had zero width difference hanging or axial gap combined bearings after fastening.
(2) using zero size pad, wedge, so as to take away the bearing preload.
(3) fasten to zero axial screw marked around the purpose of gap, nut after use. Is that in cases where, in order to obtain the right amount of preload, INA bearings to side starting frictional moment zero for determination.
The so-called pressure preload is the manipulation of helical springs, disc springs, ready to load of the bearing to take away the right of way. Are being used, a relative bearing, even if no change, preload. Is using, it would walk out, even if no change, load along the link.
Preload rear bearing preload pressure lines, take the stiffness of the bearing preload spring rigidity compared, all very small, so the spring deflection curve, about to get level axis is parallel to the fruit, the pressure imposed by the rigidity of the monomer bearing preload taken prior
Load weight roughly equal rigidity of the monomer bearing for axial loads. Locate the preload, the pressure after preload of bearings and bearing rigidity ratio of monomers.
Rigid as you preload force, locate the preload and the constant pressure of preload force are as follows.
(1) the environment equal to the amount of preload, locate the preload is invalid for add bearing rigidity, locate the preload for INA bearing load displacement of the lowest.
(2) locate the preload. Running outside, because the shaft to get the shell temperature difference of axial elongation resulting from poor, inner ring outer ring formed radial thermal expansion contraction temperature difference difference, and load deformation resulting from impact, to vary the amount of preload. Locating preload environment, formed because of the telescopic shaft sinking on the spring there are so few, does not take into account changes in preload. And was informed that the General position preload are used to improve rigidity of the target, the pressure load for high speed reverse, need to be axial vibration-proof, degree of axial thrust of INA bearing environment.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-32306CR NTN | 30 | 72 | 27 |
| 4T-32306C NTN | 30 | 72 | 27 |