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Complete set of rolling mill bearing outer ring radial runout of Kea outer ring at a different angle position, outer diameter between appearances with a fixed relative the inner ring of the difference between the maximum and minimum radial distance. In angular position or in the vicinity of the above points on either side to move bearing body shall in the inner and outer ring raceways or flanges on the inner ring back (tapered roller bearing) face contact that KOYO bearings in parts in the normal relative position.
The complete sets of bearing inner ring raceway beating Sia faced in different angular position, the inner ring, the radial distance from the inner ring axis that is half of the inner ring raceway contact diameter, relative to the outer ring and inner ring reference face of a fixed difference between the maximum and minimum axial distance between the points. Both internal and external Raceway should contact with every move.
Complete set of rolling mill bearing outer ring side face beat Sea to the outer ring road in a different corner locations, in radial distance from the axis of the outer ring line is half of outer ring raceway contact diameter, outer ring in the base end and related to a fixed difference between the maximum and minimum axial distance between points. Internal and external Raceway should all move with body contact.
Installation using brute force, direct percussion with a hammer bearing bearing injuries most; was the main cause deformation.
Installation is not in place, install the biased or not attached to the bearing, causing KOYO bearing clearance is too small. Inner and outer rings are not in uniform rotation of the Central, resulting in different hearts.
Recommendation: select the appropriate bearing installation tool or professional, installed using special instruments and detection.
According to the survey, poor lubrication is one of the major causes of premature damage of KOYO bearings. Major causes include: no lubrication or lubricant in a timely manner; lubricants or lubricant does not raise in place; lubricants or lubricant improper selection; lubrication method is inaccurate, and so on.
Recommendation: choose the exact lubricant or lubricant, lubrication filling way to use accurate.
Pollution can also cause premature damage of KOYO bearings, pollution is dust, scrap metal, such as entering the rolling mill bearings. Major causes include: open bearing prematurely before use packaging, pollution; working environment not to install clean, pollution; bearing's working environment is not clean, actuating medium pollution, and so on.
Recommendation: before using it is best not to open bearings packed; installation installation environment clean, to clean the bearings to be used; enhanced KOYO bearing sealing device.
Fatigue damage is a common way to damage the bearing. Common causes of fatigue damage might be: long-term overload operation of bearings; failure to timely maintenance; improper maintenance; aging equipment, and so on.
Complete set of rolling mill bearing inner ring radial runout when Kia inner ring on a different corner locations, the hole looks relative to the outer ring of a fixed point of the difference between the maximum and minimum radial distance. In all these points of angular position or in the vicinity on either side of the body move with the inner and outer ring raceways or flanges on the inner ring back (KOYO bearings) of the bearing parts in the normal face in contact with the relative position.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7309BDF NSK | 45 | 100 | 25 |
| 7309ADF NSK | 45 | 100 | 25 |