Rolling NTN bearings including ball bearings, tapered roller bearings, spherical roller bearings and cylindrical roller bearings and thrust ball bearings and other bearings. That the identification of various types of rolling bearings NTN what is it?
NTN identification of radial ball bearings
Normal technical status of NTN radial ball bearings, the inner and outer raceway should be no spalling and severe wear scar, and was polished to a circular arc groove; all balls should be kept round the surface without spots, cracks andpeeling off; cage is not loose, not broken, not worn out.
When to use a handheld bearing inner ring, the other hand, quickly nudge the outer ring rotates, requiring rotating stable, only to hear the slight sound of the ball rolling in the raceway, no vibration; stop should gradually slow down, stop after retrogressionphenomenon, because the normal NTN ball bearing, the clearance between the outer ring and rolling element is 0.005-0.010mm, when shaking along the radial inner and outer rings, you should feel no gap.
Used NTN radial ball bearings, hand shaking holding the inner ring along the axial few obvious sound when the outer ring and ball, with the gap exceeds 0.03mm, should no longer continue to use.
NTN tapered roller bearing identification
NTN Bearing should check the rolling element and the inner ring raceway spalling, cage too Songkuang, is complete around the edge of the inner ring, outer ring raceway for cracks. After the inner ring and roller combination into the outer roller should fall into the middle of the raceway, and forward does not exceed 1.5mm. A failure, that can not be used.
NTN thrust ball bearing identification
NTN thrust ball bearing raceway in the normal state, there should be no the spalling injury and severe wear, the ball should be no crushing and pitting; cage should be no distortion, does not collide with two roller washers, and ball firmlyShoulong together.
Identification of the NTN-aligning roller bearings and cylindrical roller bearings
Such NTN Bearing outer ring is separable. Normal state, the outer ring raceway and the roller should be no fragmentation, pitting and deep wear scar; cage should be no deformation and can roller Shoulong in the inner ring; within the outer ring raceway and roller son with the gap should not exceed 0.06mm.



Other News:
How to identify scroll NTN Bearing
How to choose the sliding NTN Bearing grease
Maintenance and installation of industrial bearings
Plain bearings - Bearing materials and structures
the non-contact seal form of bearings
Bearing maintenance
the common sense of bearing sealing device
Solving the bearing nature of noise is important to the bearing life