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1) The third force as possible through the bearing axis, which requires symmetric force point average and smooth, spherical or parallel to the axis through force.
2) the size of the force should be smooth average, not a shock, which requires the use of hydraulic or smooth tension or pressure can be applied to a tool, in fact, when you have to use the hammer, but also through other more soft and copper sleeve scrap metal does not fall to the buffer, the striking force as playful. Best to use brass or copper hammer for hammering.
3) drag force due to continue until the extent of, for example, when installing the bearing in the bearing exactly fitted to the exact position of repose force, ensuring rings (washers) abuts against the end face of the housing bore or shaft shoulder block face, neither packed too tight, they can not pretend not in place.
4) Avoid body force through move, which requires disassembly inner ring (shaft washer) through the inner force, detachable outer ring) through the outer force.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7921A5DB NSK | 105 | 145 | 20 |
| 7320BDB NSK | 100 | 215 | 47 |