There are two key points of the thrust ball bearing assembly. To maintain a nip quality control of the frame and the ball, and the other bearing assembly after the nominal control of the height T. In addition, due to the shaft washer, the seat can be separated, bring a management problem. Is to prevent the imported bearing parts mixed.
M-type stamping cage crimping assembly mold. The ball in the pocket hole rotation is flexible, but can not fall off from the pocket hole, and technical procedures of checking the ball in the pocket hole run out after lamination. The solid cage imprint weight is too deep to make the ball run out, and the embossed raised portion Cage too few connections and lack of strength, prone to out block phenomenon, resulting in the cage scrapped.
The small thrust ball bearing race and the shaft washer diameter size difference is small, there is no obvious difference between the two sets of groups. In order to prevent mixed set of phenomena that is loaded into a set of bearings occurred the pottery two sets of seat or are trapped are shaft ring. Usually sets together with the auxiliary tooling would draw circles, Block Mission distinguish or sampling the public before the nominal height diameter plug gauge check the diameter size, easy to check the inner diameter of the seat is put the following axis circle put above. If the inner diameter of the seat COURT quenching oxidation of color or not after grinding, are not necessary to test the inner diameter dimension apparent shaft due seat distinction difficult to mix sets.
Need thrust ball bearing assembly to the nominal height of T measurements confirm a hundred qualified? Measurement, with a high degree of Block or difficult pieces calibration and measured load bearing be rotated ten times, be sure to reach a minimum height.
In accordance with the standards, fag axis Chengzong Gong said deviation of height T minus direction or negative, so the size specified tolerance minus direction. If the parts meet the requirements to enter the assembly together sets of high T is not ultra-poor. Otherwise, it is necessary to take advantage of the ball diameter size (increase or decrease) matching. But the use of too large or too small steel balls will not only affect the quality of the nip of the steel ball and the holder, but also will change the state of contact of the ball and raceway, and affect bearing life. Only Grinding in strict accordance with the size deviation processing, assembly work record before turn Lee and co sets without sorting ditch before the height of the base surface size deviation, we can achieve the purpose of supporting any.
Thrust bearings and shaft with generally with the transition the seat bearing hole with generally loose fit (see here, you must agree with me). Central axis of the circle of the bi-directional thrust bearing should be fixed on the shaft relative to the shaft to prevent rotation. Thrust bearing installation method, under normal circumstances, the axis of rotation of the majority, and therefore for the inner ring and shaft with win with the bearing outer ring of the bearing chamber with clearance fit.
Thrust bearing installed, you should test the verticality of the shaft washer and shaft centerline. The dial gauge fixed on the end face of the tank shell, and touch the top of the head of the table bearing shaft washer raceway upper rotating bearing, while observing dial gauge pointer, if the pointer deflection, shaft washer and shaft centerline is not perpendicular. Tank shell hole deeper, it can also be used to lengthen the dial gauge head test. Thrust bearing is installed correctly, the seat can automatically adapt to the rolling of the rolling body, and to ensure that the rolling body is located in the upper and lower raceway. If installed backwards, not only bearing is not normal, and the mating surface would be subjected to severe wear. Shaft ring and seat and the difference is not obvious, the assembly should be extra careful not to mistake. In addition, the seat thrust bearing and the bearing hole should leave a gap of 0.2-0.5mm, to compensate for part machining, installation the imprecision caused the error, when the bearing ring center offset operation, this gap ensure its automatic adjustment, and avoid touching the friction and its normal operation. Otherwise, it will cause intense damage of the bearing.
Thrust bearing installed, you should test the verticality of the shaft washer and shaft centerline. The dial gauge fixed on the end face of the tank shell, and touch the top of the head of the table bearing shaft washer raceway upper rotating bearing, while observing dial gauge pointer, if the pointer deflection, shaft washer and shaft centerline is not perpendicular. The box shell hole deeper inspection, can also be used to lengthen the dial gauge head
Thrust bearing is installed correctly, the seat can automatically adapt to the rolling of the rolling body, and to ensure that the rolling body is located in the upper and lower raceway. If installed backwards, not only bearing is not normal, and the mating surface would be subjected to severe wear. Shaft ring and seat and the difference is not obvious, the assembly should be extra careful not to mistake. In addition, the seat thrust bearing and the bearing hole should leave a gap of 0.2-0.5mm, to compensate for part machining, installation the imprecision caused the error, when the bearing ring center offset operation, this gap ensure its automatic adjustment, and avoid touching the friction and its normal operation. Otherwise, it will cause intense damage of the bearing.
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