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Class 8 thrust ball bearings 中文版

Class 8 thrust ball bearings

Class 8 thrust ball bearings Class 8 thrust ball bearings Class 8 thrust ball bearings
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  • Updated: 2022-05-27 15:38
  • About Product:Thrust ball bearing is designed to withstand the Thrust load when running at high speed. It is composed of gasket ring with ball rolling groove, Because the ring is as the type, The thrust ball bearing is means into two types: flat base as the type and centering spherical as type. In addition, the bearing can bear the axial load, but not the radial load.
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composition

Composition of thrust ball bearing:

The thrust ball bearing consists of a seat ring, a shaft ring and a steel ballcageComponents consist of three parts.

The axle ring is matched with the shaft, and the seat ring is matched with the shell.

species

species:

According to the force of the situation divided into one-way thrust ball bearings and two-waythrustBall bearings.Unidirectional thrust ball bearingCan bear the unidirectional axial load.

Bidirectional thrust ball bearing, can bear bidirectional axial load, in which the shaft ring andshaftTo cooperate. The mounting surface of the seat ring is spherical bearing, which has the function of centering and can reduce the influence of installation error.

The thrust ball bearing can not bear the radial load and the limit speed is low.

The characteristics of

1. There are two types: one-way and two-way

2. To allow for installation errors, either one-way or two-way, spherical centering spherical cushion or spherical seat ring can be selected.

3.High quality steel - use super clean steel which can extend the bearing life by up to 80%

4. High grease technology - NSK lubricant technology can be usedgreaseThe service life is prolonged and the bearing performance is improved

5. High grade steel ball -- quiet and smooth when rotating at high speed

6. Use the ring in the option to allow installation errors.

use

Application of thrust ball bearing:

It is only suitable for machines with low rotating speed and bearing one axial load, such as crane hook, vertical water pump,Vertical centrifuge, jack, low speed reducer, etc. Bearing shaft ring, seat ring and rolling body is separated, can be installed and disassembled respectively.

assembly

There are two key points for assembly of thrust ball bearingcageThe other is the control of the nominal height T after the bearing assembly. In addition, since the shaft ring and seat ring can be separated, it brings a management problem, which is to prevent the imported bearing parts from being mixed. M-type punching cage is assembled by bending die. After pressing, it is required that the steel ball can rotate flexibly in the pocket hole, but not fall off from the pocket hole, and the cross momentum of the steel ball in the pocket hole is checked by technical regulations. If the solid cage is embossed too deeply, the steel ball will have a small momentum across, and the embossed raised part is connected to the cage too little and the strength is insufficient, which is prone to block drop, causing the cage to be scrapped. There is a small difference in the inner diameter between the small thrust ball bearing ring and the shaft ring, and there is no obvious difference between the two sets. In order to prevent the mixing of sets, that is to say, one set of bearings is installed and it is found that both of them are seat rings or both of them are shaft rings. It is necessary to take certain measures. Usually, when the sleeve is closed, the ring and the block are distinguished with the help of auxiliary tools, or the inner diameter is checked with the inner diameter plug gauge before the nominal height is checked, and the seat ring is placed below and the shaft ring is placed above for the convenience of checking the inner diameter. If the inner diameter of the seat ring has obvious quenching heating oxidation color or not through grinding, there is no need to check the inner diameter size, can clearly see the difference between the shaft ring and the seat ring, not easy to mix. After assembly of thrust ball bearing, the nominal height T shall be measured to confirm whether it is qualified. When measuring, calibrate with height block or standard parts, and measure the load, the bearing must be rotated dozens of times, must reach the minimum height.

When the thrust ball bearing is running at high speed, the contact Angle between the steel ball and the radial plane of the raceway will be affected by centrifugal force, thus causing the sliding of the steel ball relative to the raceway. The adhesive wear caused by this sliding can damage the bearings. To prevent such damage, the minimum load on the thrust ball bearing must be guaranteed, as shown in formula 1 or formula 2, whichever is the larger of the calculated values.

Formula 1: Famin = K? N * n

Formula: 2 Famin = Coa / 1000

Famin: minimum axial load (N)

K: minimum axial load coefficient

N: speed (per minute)

Coa:Basic rated static load(N)

Unidirectional thrust ball bearing can only bear the load in one direction. If it can bear the load in two directions, it must be selectedTwo-way thrust ball bearing. Thrust ball bearings must apply a minimum or preload. When the axis is perpendicular, the weight of the axis usually exceeds the minimum load. At this time, due to the influence of axial outward load in the opposite direction, the load of this action may be reduced.

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