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Thrust ball bearing assembly has two key points. A cage and the ball is laminated quality control, the other is the nominal bearing after assembly height T control. In addition, since the shaft ring, seat ring can be separated, bring a management issues. Is to prevent the import of bearing parts mixed. M-type stamping cage assembly using crimping die. After pressing the ball in the pocket hole required rotation flexibility, but can not fall from the pockets and technical procedures check balls in the pocket bore runout. Solid cage stamping presses too small will make the ball runout and embossed with raised portions connecting the cage is too small and not strong enough, prone to block out phenomenon, resulting cage scrapped. Small thrust ball bearing race ring and the shaft diameter size difference is small, there is no obvious difference between the two sets of groups. In order to prevent the emergence of the phenomenon of mixed units, namely a set of bearings fitted into a set of difficulties are occurring Tao seat or are shaft washer situation. This need to take certain measures. Usually set when combined with auxiliary tooling would draw ring, seat regiment distinguished, or sampling nominal height diameter plug before checking with diameter size, in order to check the diameter of convenience, put the following races, placed above the shaft ring. If the diameter of a clear seat Court oxidized color quenching or without grinding, inner diameter of the test is not necessary, can obviously be seen that axis and the seat ring due to the difference, easy to mix sets. Thrust ball bearing assembly to be right after the nominal height T measurements confirm a hundred qualified. When measured with a high degree of alignment blocks or standard difficult pieces, and be measured load bearing rotation if need ten times, be sure to meet the minimum height.
When the thrust ball bearing is operating at high speed, the ball and raceway contact angle of the radial plane will be affected by centrifugal force, thereby causing the ball slide relative to the raceway. This sliding adhesive wear caused by damage to bearings. To prevent such damage, must ensure that the minimum thrust ball bearings under load, as shown in Equation 1 or Equation 2, whichever is the greater of the calculated value. .
Equation 1: Famin = K · n * n
Equation 2: Famin = Coa/1000
Famin: minimum axial load (N)
K: Minimum axial load factor
n: Speed (per minute)
Coa: Basic static load rating (N)
Thrust ball bearings can only bear a load direction, if withstand the loads in both directions, you must use two-way thrust ball bearings. Thrust ball bearings must be applied minimum load or preload. When the axis perpendicular to the axis of weight usually exceeds the minimum load. At this time the opposite direction of the axial external load, which is possible to reduce the load acting.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NJ2218E NTN | 90 | 160 | 40 |
| NJ2218 NTN | 90 | 160 | 40 |