The customer uses lubricated brass bearings that run on customer's steel shafts (Figure 1). Application data were also provided. (Table 1).
The igus® laboratory carried out tests in order to compare the wear of different iglidur® materials with competitors' bearings and find the ideal material for this application.
Figure 1: Brass bearings and customer's shaft
|Bearing material||Brass bearings (competitor's); iglidur® Z; iglidur® Q|
|Movement||Displacement: tumbling (with bulldozer effect)|
|Speed||0.15 m/s (corresponds to 74 rpm in the test)|
|Cycle||4 rotations (10 s), 90 s pause|
|Load||3 MPa to 28.5 MPa (increases every time a rotation is completed)|
Figure 2: Test set-up
The tests were carried out dry and also with initial lubrication. The lubricant used for the test was OKS 400. The results of the tests are compared in Table 2 and Figure 3.
iglidur® Z bearings, iglidur® Q bearings and competitors' bearings made of brass were tested dry as well as with lubrication on the customer's steel shaft; p = 14.67 MPa; n = 74 RPM
Marks on the bearings and shaft were visible.
There are almost no visible signs of damage on the sliding surface.
The bearings have a few marks on the inner diameter surface caused during initial wearing-in of the bearings.
In this test, the iglidur® Q material showed the least amount of wear and had the best results in the test bay.
The worst results were exhibited by the tested brass bearings due to the high level of bearing wear and the damage to the shaft.
We would be happy to also test your individual specific application. Just use the contact form!