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iglide® F2 - material data
Material table
General features
Unit
iglide® F2
test method
Density
g/cm³
1,52
Color
black
Max. humidity absorption at 73°F/50% R. H.
% weight
0,2
DIN 53495
Max. water absorption
% weight
0,4
Coefficient of surface friction, dynamic, against steel
µ
0,16 - 0,22
PV values max. (dry)
PSI - ft/min
8,750
Mechanical properties
Bending E-module
psi
1,075,890
DIN 53457
Tensile strength at +68 °F
psi
13,488
DIN 53452
compressive strength
psi
8,847
Maximum recommended surface pressure (68° F)
psi
6,815
Shore D hardness
72
DIN 53505
Physical and thermal properties
Max. long term application temperature
°F
+248
Max. short term application temperature
°F
+329
Lower application temperature
°F
-40
Heat conductivity
[W/m x K]
0,61
ASTM C 177
Coefficient of thermal expansion (at 73° F)
[K-1 x 10-5]
5
DIN 53752
Electrical properties
Specific forward resistance
Ωcm
< 109
DIN IEC 93
Surface resistance
Ω
< 109
DIN 53482
'Table 01: Material Data
Figure 01: Permitted pv-values for iglide® F2 bearings with 1 mm wall thickness in dry operation against a steel shaft, at +68°F, installed in a steel housing.
X = Surface speed [ft/min]
Y = Load [psi]
The prevention of electrostatic charge is an important requirement in many application areas. At the same time,the other technical application parameters,such as wear resistance, media, and temperatureresistance, use in wet environments,etc. must not fall by the wayside. With its broad property profile, iglide® F2represents a new universal bearingfor a wide range of EMC compatible applications.
Figure 02: Maximum recommended surface pressure dependent on the temperature (6,817 psi to +68 °F)
X = Temperature [°F]
Y = Load [psi]
Mechanical properties
The pressure resistance of iglide® F2 plain bearings declines with increasing temperatures. Fig. 02 clarifies this connection. With the long-term permitted application temperature of +248°F, the permitted surface pressure still amounts to 2,901 psi. Maximum recommended surface pressure represents a mechanical material parameter. Tribological conclusions cannot be drawn from it.
Fig. 03 shows the elastic deformation of iglide® F2 during radial loading. Under the maximum recommended surface pressure of 6,817 psi, the deformation amounts to less than 2,6%. A plastic deformation can be negligible up to this pressure load. It is however also dependent on the period of exposure.
Figure 04: Coefficients of friction dependent on the surface speed, p = 108 psi
X = Sliding speed [ft/min]
Y = Coefficient of friction μ
Friction and wear
Coefficient of friction and wear resistance alter with the application parameters(Fig. 04 and 05).
Figure 05: Coefficients of friction dependent on the load, v = 1.94 ft/min
X = Load [psi]
Y = Coefficient of friction μ
iglide® F2
Dry
Grease
Oil
Water
Coefficients of friction µ
0,16 - 0,22
0,1
0,05
0,03
Table 04: Coefficients of friction for iglide® F2 against steel (Ra = 1 µm, 50 HRC)
Fig. 06: Wear, rotating application with various shaft materials p = 145 psi, v = 59 ft/min
X = shaft materials
Y = wear [μm/km]
A = Aluminum, hard-anodized
B = machining steel
Shaft materials
Fig. 06 shows the results of tests of various shaft materials with bearings made of iglide® F2. In the lower load range, machining steel and hard-anodized aluminium shafts, as well as St37 and hard-chrome-plated steel shafts prove to be the best counter partners in rotating applications with iglide® F2 bearings from a wear perspective. Fig. 07 shows a far lower level of wear with rotational movements than pivoting movements across the complete load spectrum, with an otherwise comparable graph line shape.
