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iglidur® W360 - Material data

Material table

Genera l features Unit iglidur® W360 test method
Density g/cm³ 1,34
Colour yellow
Max. humidity absorption at 23°C/50% R. H. Wt.-% 0,2 DIN 53495
Max. water absorption Wt.-% 1,6
Coefficient of surface friction, dynamic, against steel µ 0,07 - 0,21
pv value, max. (dry) MPa x m/s 0,35

Mechanical properties
Bending E-module MPa 3.829 DIN 53457
Tensile strength at +20 °C MPa 119 DIN 53452
compressive strength MPa n.r.
Maximum recommended surface pressure (20° C) MPa 75
Shore D-hardness n.r. DIN 53505

Physical and thermal properties
Max. long term application temperature °C +180
Max. short term application temperature °C +200
Minimum application temperature °C -40
thermal / heat conductivity [W/m x K] 0,24 ASTM C 177
Coefficient of thermal expansion (at 23° C) [K-1 x 10-5] 6 DIN 53752

Electrical properties
Specific forward resistance Ωcm > 1013 DIN IEC 93
Surface resistance Ω > 1012 DIN 53482
Table 01: Material properties


iglidur W360
 

Fig. 01: Permissible pv values for iglidur® W360 plain bearings in dry operation against a steel shaft at +20°C.
 
X = Sliding speed [m/s]
Y = Load [MPa]

humidity absorption / moisture absorption


 
The moisture absorption of iglidur® W360 is low and can be disregarded when using in moist environment. With a complete saturation of 1.6%, the application under water is however only very limited.


iglidur W360 Figure 02: Maximum recommended surface pressure dependent on the temperature (60 MPa to +20 °C)
 
X = Temperature [°C]
Y = Load [MPa]
iglidur W360 Figure 03: Deformation under load and temperatures
 
X = Load [MPa]
Y = Deformation [%]

Mechanical properties

With increasing temperatures, the compressive strength of iglidur® M360 plain bearings decreases. Fig. 02 clarifies this connection. At +180℃, the surface pressure is still 10 MPa. Maximum recommended surface pressure represents a mechanical material parameter. Tribological conclusions cannot be drawn from it.

iglidur® W360 plain bearings are suitable for a wide load range. Fig. 03 shows the deformation under temperature. The behavior of materials under short-term stress is shown here.


Maximum surface speed

m/s Rotary oscillating Linear
Constant 1,2 0,9 3,0
Short-term 2,7 2,0 5,0

Table 03: Maximum surface speeds

Permitted surface speeds

iglidur® W360 plain bearings are well suited for low and medium speeds, both in rotating and oscillating applications. Linear motions can also be well mounted with iglidur® W360.


Temperatures

The temperature resistance makes iglidur® W360 a very universal material for plain bearings in different industries. Application temperatures up to +220°C are permitted on the short term. Please note that from +90°C the press-in fastening of the bearings is not sufficient and an additional securing of the bushings is required.


iglidur® W360 Dry Grease Oil Water
Coefficients of friction µ 0,07 - 0,21 0,09 0,04 0,04

Table 04: Table 04: Coefficients of friction against steel (Ra = 1 µm, 50 HRC)

Friction and wear

The coefficients of friction of iglidur® W360 in dry operation against steel lie in a very good range. They remain very stable at a low level over the speed. Fig. 04 clarifies this connection. With increasing load, the friction coefficient decreases very strongly, especially till about 15 MPa(Fig. 05).

Fig. 04: Coefficients of friction Figure 04: Coefficients of friction dependent on the surface speed, p = 1 MPa
 
X = Sliding speed [m/s]
Y = Coefficient of friction μ
Fig. 05: Coefficients of friction in Figure 05: Coefficients of friction dependent on the load, v = 0,01 m/s
 
X = Load [MPa]
Y = Coefficient of friction μ

Fig. 06: Coefficients of friction Figure 06: Coefficients of friction dependent on the shaft surface (CF53 shaft)
 
X = shaft surface Ra [μm]
Y = Coefficient of friction μ

shaft materials

In the case of iglidur® W360, the surface roughness of the shaft in the range till 1.6 MPa has practically no effect on the coefficient of friction (Fig. 06). Figure 07 shows a summary of the results of tests with different shaft materials. iglidur® W360 plain bearings are suitable for all gliding partners. In rotation at 1 MPa load, for example, aluminium HC, CF53 and stainless steel shafts stand out. The picture looks similar in other loads or swivel movements. Please contact us in case the shaft material scheduled by you is not included here.

Wear, rotating Fig. 07: Wear, rotating application with different shaft materials, p = 1 MPa, v = 0.3 m/s
 
X = shaft materials
Y = wear [μm/km]
 
A = Aluminum, hard-anodized
B = machining steel
C = Cf53
D = Cf53, hard chrome-plated
E = St37
F = V2A
G = X90

Medium Resistance
Alcohols 0 to -
Hydrocarbons +
Greases, oils without additives +
Fuels +
Diluted acids 0 to -
Strong acids 0 to -
Diluted bases +
Strong bases +
+ Resistant     0 Conditionally resistant      - Not resistant
 
All specifications at room temperature [20°C]
Table 02: Chemical resistance of iglidur® W360

Further properties

Radioactive rays The iglidur® W360 bearings are radiation resistant up to a radiation intensity of 2 • 102 Gy.
 

UV-resistant igubal® W360 plain bearings are partially resistant against UV rays.
 

VacuumIn a vacuum, iglidur® W360 bearing degases only to a very small extent. The application in vacuum is possible only for dry bearings.


Diameter
d1 [mm]
Shaft
h9 [mm]
iglidur® W360
E10 [mm]
Housing H7
[mm]
up to 3 0 - 0,025 +0,014 +0,054 0 +0,010
> 3 bis 6 0 - 0,030 +0,020 +0,068 0 +0,012
> 6 bis 10 0 - 0,036 +0,025 +0,083 0 +0,015
> 10 bis 18 0 - 0,043 +0,032 +0,102 0 +0,018
> 18 bis 30 0 - 0,052 +0,040 +0,124 0 +0,021
> 30 bis 50 0 - 0,062 +0,050 +0,150 0 +0,025
> 50 bis 80 0 - 0,074 +0,060 +0,180 0 +0,030

Table 05: Important tolerances according to ISO 3547-1 after the press-in

Installation tolerances

iglidur® W360 plain bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed for press-fit in a housing with h7 tolerance. After the installation in a housing with nominal diameter, the inner diameter of the bearing automatically adjusts to the E10 tolerance.