KS PERMAGLIDE® plain bearings Plain bearing mounting Press-in force and joint pressure
Press-in force and joint pressure are interdependent. The joint pressure occurs between the housing bore and the surface of the bush jacket. It can be understood as a measure of how securely the bush fits in the housing. Together with other factors, the joint pressure influences the amount of press-in force.
Motorservice offers the calculation of the press-in force as a service. In most cases, the estimate of press-in force as per Fig. 1 is sufficient.
This calculation assumes a steel housing with a diameter of DG that has been adapted to the bush outside diameter DO. The selected ratio is DG: DO ≈ 1.5...2.
Calculating the press-in force
The press-in force depends upon many factors, which are extremely difficult to measure accurately, for example:- Actual press-fit
- Coefficient of friction
- Scoring
- Press-in speed
Motorservice offers the calculation of the press-in force as a service. In most cases, the estimate of press-in force as per Fig. 1 is sufficient.
Determining the bush press-in force
Figure 1 below shows the maximum required press-in force per mm of bush width. The curves represent the bush outside diameter DO and the bush wall thickness s3 to DIN ISO 3547.This calculation assumes a steel housing with a diameter of DG that has been adapted to the bush outside diameter DO. The selected ratio is DG: DO ≈ 1.5...2.
Fig. 1: Press-in force FE
Example of estimate of press-in force Ftotal
Given: | Bush | PAP 4030 P14 |
Bush outside diameter | DO = 44 mm | |
Bush width | B = 30 mm | |
Bush wall thickness | s3 = 2 mm | |
[ 14 ] | Ftotal = FE · B | = 340 N/mm · 30 mm = 10200 N |
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Application examples
Take a look at our application examples with KS PERMAGLIDE® plain bearings