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iglide® B - Material data
Materials table
General features
Unit
iglide® B
Test method
Density
g/cm³
1,15
Color
Gray
Max. humidity absorption at 23° C/50% R. H.
Wt.-%
1,0
DIN 53495
Max. water absorption
Wt.-%
6,3
Mechanical properties
Bending E-module
MPa
1.750
DIN 53457
Bending strength at 20° C
MPa
55
DIN 53452
Maximum recommended surface pressure (20° C)
MPa
40
Shore D hardness
69
DIN 53505
Physical and thermal properties
Upper long-term application temperature
°C
100
Upper short-term application temperature
°C
130
Upper short-term ambient temperature1)
°C
150
Lower application temperature
°C
-40
Electrical properties
Specific forward resistance
Ωcm
> 1010
DIN IEC 93
Surface resistance
Ω
> 10 9
DIN 53482
- Without additional load; no gliding movement; relaxation not excluded.
Permitted p x v values
For iglide® B bearings with 1 mm wall thickness in dry operation against a steel shaft, at 20° C, installed in a steel housing.
Vibration dampening and the separation of impact sound were the focus in the development of iglide® B.
Figure 22.2: Deformation under load and temperatures
Surface pressure
The compressive strength of the iglide® B bearings is on the one hand low, but on the other, is an important property of the bearing. They are mainly used where vibration dampening and acoustic separation are required.
Figure 22.3: Maximum recommended surface pressure dependent on the temperature
Temperatures
The operating temperature of the iglide® B bearings is limited to 100° C. From 50° C onward, the very soft bearing should be mechanically fastened, so that the danger of bushings creeping out of the bores is avoided. The wear resistance too declines disproportionately from 70° C.
Figure 2.4: Coefficients of friction dependent on the surface speed, p = 0.75 MPa
Friction and wear
The iglide® B bearings assume a center position in wear resistance. As far as the bearing load is not too high, the attained coefficients of wear are pretty good. An increase in load results in a disproportionate increase in abrasion.
Fig. 2.7: Wear, rotating application with different shaft materials, load p = 0.75 MPa, v = 0.5 m/s
Shaft materials
The influence of the shaft is not very large in wear resistance.
Figures 22.7 and 22.8 clarify that very similar wear data are attained with different shaft materials. If high operational performances are expected, the bearing load should not be too high.
Figure 22.10: Influence of humidity absorption of iglide® B bearings
Radioactive rays
iglide® B bearings are radiation resistant up to a radioactive intensity of 3 x 10² Gy.