ntn bearing performance and installation

1: ntn bearing performance:
1.ntn bearing stiffness
ntn bearing stiffness, is ntn bearing power generating units, the size of the required deformation. Rolling of elastic deformation is small, in most machines do not have to be considered, but in some machines, such as machine tool spindle, the bearing stiffness is an important factor, the general should be used cylindrical and tapered roller bearings. Because these two types of bearings and loaded, its rolling point contact with the raceway is, less rigid.
2.ntn aligning bearing performance
The quality of self-aligning bearing performance, and its axis to allow the different degree of the different axis scale value larger, better aligning performance. Ntn bearings allow different types of degrees shown in Table 1.
When the axis of the center line and bearing center line is different from a point of error, or pitch axis bearing two large and rigid shaft with less vulnerable to bending or tilt may make use of aligning performance with good tone ball or spherical roller bearings, ball bearings and the outside. Such bearings or bend in the axis is slightly tilted case, can keep working.
2: ntn bearing installation process:
1. Shaft and housing inspection
Cleaning bearings and housing, confirmed that no injuries or machining burrs left. Enclosure is absolutely prohibited abrasives (SiC, Al2O3, etc.) sand, chip and so on. Second test shaft and housing size, shape and finish quality is consistent with the drawings. Before installing bearings, shaft and qualified in the test case of the surface coated with machine oil.
2. Bearing preparations
As the bearings rust after treatment and be packaged, so do not open the package before installing Pro. In addition, the bearings on the coating of rust preventive oil with good lubricating performance, and for general use bearings or bearing grease filling can be used directly without cleaning. But Instrument bearing or bearings for high-speed rotation, application of clean oil clean oil will wash away the rust, then bearing easily rust, not a long time to place.
3. Bearing Installation
Bearings due to bearing types and installation methods vary with conditions. As a general multi-axis rotation, the inner ring and outer ring can be used separately with the interference fit and clearance, while the outer ring rotation, the outer ring with the interference fit.
Heat set to install the bearings in oil heated to expand and then installed in the shaft of the heat set method can avoid unnecessary external force bearing in a short time to complete the installation.
Pressed into general use to install onto the installation of the press, also can make use of bolts and nuts, when forced into the use of hand-loaded hammer.

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