What should be paid attention to when fitting the turntable bearing with the shaft and bearing seat?

Release time:

2023-04-19 14:58

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Improper selection of the turntable bearing, shaft, and bearing seat can affect the cooperation of the equipment, and have a significant impact on the operational accuracy, dynamic characteristics

Improper selection of the turntable bearing, shaft, and bearing seat can affect the cooperation of the equipment, and have a significant impact on the operational accuracy, dynamic characteristics, and service life of the bearing. For example, excessive cooperation can increase the radial preload of the bearing, leading to increased friction, heating, raceway load, and wear of the bearing, reducing the ultimate speed and service life of the bearing. So how to choose the collaboration between the turntable bearing and the shaft and bearing seat? 1、 Recommendation and cooperation between turntable bearings and shafts: The recommendation for shaft manufacturing and public service is to use h5. Regarding the accuracy requirements of the operation and the rolling condition of the inner ring, the collaborative space should be as close to zero as possible, otherwise the collaborative space will increase the bearing's runout. For high-speed and longer working conditions, the collaborative open space cannot exceed 0.01mm; Regarding the HRTS high-speed series, the collaborative open space cannot exceed 0.005mm. 2、 Recommendation and collaboration of turntable bearings and bearing pedestals: J6 is recommended for the manufacturing of bearing pedestals. With regard to the operation accuracy requirements and the rolling condition of the inner circle, the cooperation space should be as close to zero as possible. If the outer circle is suspended and there is no radial alignment, the planning should choose the space ground cooperation; For working conditions with higher speeds or longer operating hours, the outer ring of the bearing should have no radial alignment planning and adopt at least 0.002mm of collaborative space with the bearing, which can reduce the increase in preload caused by bearing heating. 3、 The selection of rotary table bearing cooperation is due to the use of bolt connection fixation method for rotary table bearings. Assuming that the outer ring of the bearing is fixed to the suspension component through bolts, it is possible to choose not to require radial positioning of the bearing seat, or perhaps choose to cooperate with the ground, which generally makes the device easier. Assuming that the inner ring of the turntable bearing is fixed to the suspension component through bolts, from a functional perspective, the entire height of the turntable bearing still needs to be radially supported by the shaft and tends towards zero collaboration

key word:

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