MXB-JFFB Self-Lubricating Half Bearing
Cat:Self-Lubricating Bearing
MXB-JFFB self-lubricating half bearings refer to bearings that cover only half of the circumference of a shaft or axle, providing support and reducing...
See DetailsThe interference fit of oil-free bearings means that during the installation process of oil-free bearings, the outer diameter is designed to be slightly larger than the inner diameter of the seat hole, which generates a certain amount of stress after assembly. This design aims to maintain a high roundness of the inner circle of the bearing and secure the bearing more firmly, effectively preventing slippage and wear. The design and application of oil-free bearing interference ensures the stability and reliability of the bearings under harsh working conditions.
Advantages of interference fit
Oil-free bearings, such as the SF-1 series, have significant features such as no need for lubrication, easy maintenance, and long service life. Therefore, they are widely used in various types of mechanical equipment, especially in situations with low speed, heavy load or difficult maintenance.
Calculation of interference
The interference is divided into minimum and maximum values, which are calculated from the maximum and minimum values of the outer diameter of the bearing and the inner diameter of the seat hole.
The calculation formula for interference is as follows:
Example:
SF-1 series SF-1·2015 (standard product), matching seat hole Dh=23H7+0.021, find the interference amount after assembly.
Calculate:
It is known that the maximum bearing outer diameter Max=23.075 and the minimum bearing outer diameter Min=23.035;
The maximum value of the inner diameter of the seat hole is Max=23.021, and the minimum value of the inner diameter of the seat hole is Min=23.00.
δmin=minimum bearing outer diameter Dmin-maximum seat hole inner diameter DHmax=23.035-23.021=0.014
δmax=maximum bearing outer diameter Dmax-minimum seat hole inner diameter DHmin=23.075-23.000=0.075
Therefore, the interference amount after assembly δ=0.014~0.075mm
The following points need to be noted for the interference fit of oil-free bearings:
In addition, attention should also be paid to the inspection of interference fitting parts before assembly, such as interference amount, verticality deviation, mating surface condition, etc., to ensure smooth assembly and normal use of the bearing.
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