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iglide® A160 - Material data

Material table

Genera l features Unit iglide® A160 test method
Density g/cm³ 1,0
Color blue
Max. humidity absorption at 73°F/50% R. H. % weight 0,1 DIN 53495
Max. water absorption % weight 0,1
Coefficient of surface friction, dynamic, against steel µ 0,09 - 0,19
pv values (dry) PSI - ft/min 7,800

Mechanical properties
Bending E-module psi 166,938 DIN 53457
Tensile strength at +68 °F psi 2,755 DIN 53452
compressive strength psi 5,366
Maximum recommended surface pressure (68° F) psi 2,175
Shore D-hardness 60 DIN 53505

Physical and thermal properties
Max. long term application temperature °F +194
Max. short term application temperature °F +212
Minimum application temperature °F -58
thermal / heat conductivity [W/m x K] 0,30 ASTM C 177
Coefficient of thermal expansion (at 73°F ) [K-1 x 10-5] 11 DIN 53752

Electrical properties
Specific forward resistance Ωcm > 1012 DIN IEC 93
surface resistance Ω > 1012 DIN 53482


iglide A160
 

Fig. 01: Permitted PV values for iglide® A160 plain bearings with 1 mm wall thickness in dry-running operation against a steel shaft, at +68°F, installed in a steel housing
 
X = gliding speed [ft/min]
Y = load [psi]

iglide® A160 plain bearings are characterized by extreme media resistance at a low cost. Tribologically optimized, the material can be used in up to +194°F and also possesses conformity demanded in the food processing sector. The property profile is rounded out by its "visual detect-ability" - e.g. the blue color frequently demanded by the industry.


iglide A160 Figure 02: Maximum recommended surface pressure dependent on the temperature (2,176 psi to +68 °F)
 
X = Temperature [°F]
Y = Load [psi]
iglide A160 Figure 03: Deformation under load and temperatures
 
X = Load [psi]
Y = Deformation [%]

Mechanical properties

With increasing temperatures, the compressive strength of iglide® A160 bearings decreases. Fig. 02 clarifies this connection. Maximum recommended surface pressure represents a mechanical material parameter. Tribological conclusions cannot be drawn from it.
 
Figure 03 shows the elastic deformation of iglide® A160 with radial loads. Under the maximum recommended surface pressure of 2,176 psi, the deformation amounts to less than 3,0%. A plastic deformation is negligible up to this radial load. It is however also dependent on the period of exposure.


ft/min Rotary Oscillating Linear
Constant 98 78 393
Short-term 137 118 590
Table 02: Maximum surface speeds

Permitted surface speeds

iglide® A160 is developed for low surface speeds. Maximum speeds up to 98 ft/min (rotating) and 393 ft/min (linear) respectively are permitted for continuous application in dry operation. The values specified in Table 02 state the limits to which the long-term permitted temperature rises due to friction heat. In practice these limit values are not always reached due to interactions.


iglide® A160 Operating temperature
Lower - 58 °F
Upper, long-term + 194 °F
Upper, short-term + 212 °F
Secure axially in addition + 140 °F
Table 03: Temperature limits

Temperatures

With increasing temperatures, the compressive strength of iglide® A160 plain bearings decreases. Fig. 02 clarifies this connection. The temperatures prevailing in the bearing system also have an influence on the bearing wear. An additional securing is recommended at temperatures higher than +140°F.


iglide A160 Figure 04: Coefficients of friction dependent on the surface speed, p = 108 psi
 
X = Sliding speed [ft/min]
Y = Coefficient of friction μ
iglide A160 Figure 05: Coefficients of friction dependent on the load, v = 1.96 ft/min
 
X = Load [psi]
Y = Coefficient of friction μ

Friction and wear

Coefficient of friction and wear resistance alter with the application parameters. In the iglide® A160 bearings, the alteration of the friction coefficient µ dependent on surface speed and the shaft's surface finish is only negligently pronounced. However, the friction value drops significantly as the load increases. The ideal surface roughness of the shaft in relation to the friction value is at 0.6-0.7 Ra.

iglide® A160 Dry Grease Oil Water
Coefficients of friction µ 0,09 - 0,19 0,08 0,03 0,04

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


Fig. 06: Wear, rotating application with various Figure 06: Wear, rotating application with different shaft materials, p = 145 psi, v = 59 ft/min
 
X = Shaft material
Y = Wear [μm/km]
 
A = Aluminum, hard-anodized
B = machining steel

Shaft materials

Figure 06 displays a summary of the results of tests with different shaft materials, which were conducted with iglide® A160 plain bearings in dry operation. For rotational applications with low loads, the most interesting media- and corrosion-resistant shaft materials V2A, X90 and hard chrome-plated steel reveal themselves as good counter-partners. On X90 shafts, however, the wear increases the fastest with the load (Fig. 06). With Cf53 shafts, the wear in swiveling applications is exemplary compared to rotating applications. In rotation the wear, as with many other iglide® materials, is higher than in the swiveling.

Fig. 07: Wear in oscillating and rotating Fig. 07: Wear at rotating or oscillating motions with CF53 shaft material dependent on the load
 
X = load [psi]
Y = wear [μm/km]
 
A = rotating
B = oscillating

Medium Resistance
Alcohols +
Hydrocarbons +
Greases, oils without additives +
Fuels + to 0
Diluted acids +
Strong acids +
Diluted bases +
Strong bases +
+ resistant      0 limited resistance      - unresistant
All specifications at room temperature[+68 °F]
Table 05: resistant to chemicals


Electrical properties

Specific forward resistance < 1012 Ωcm
Surface resistance < 1012 Ω
iglide® A160 bearings are electrically insulating.

Chemical resistance

iglide® A160 bearings can be used under various environmental conditions and in contact with numerous chemicals. Table 05 gives an overview of the chemical resistance of iglide® A160 bearings at room temperature.

Radioactive rays

iglide® A160 bearings are radiation resistant up to a radioactive intensity of 1 · 105 Gy. Higher radiations affect the material and can lead to the loss of important mechanical properties.

UV-resistant

iglide® A160 plain bearings are partially resistant to the impact of UV radiation.

Vacuum

In application in vacuum, the potentially existent moisture content is degassed. For this reason only the dry iglide® A160 bearings are suitable for vacuum.


Maximum moisture absorption
by +73 °F/50 % r. F. 0,1 weight-%
Max. water absorption 0,1 weight-%
Table 06: humidity absorption

Moisture absorption

The iglide® A160 bearings absorb up to 0.1% water through atmospheric humidity (+73°F, 50% relative atmospheric humidity), when saturated with water they absorb 0,1%.


Diameter
d1 [mm]
Shaft
h9 [mm]
iglide® A160
F10 [mm]
Housing H7
[mm]
Up to 3 0 - 0,025 +0,014 +0,054 0 +0,010
> 3 to 6 0 - 0,030 +0,020 +0,068 0 +0,012
> 6 to 10 0 - 0,036 +0,025 +0,083 0 +0,015
> 10 to 18 0 - 0,043 +0,032 +0,102 0 +0,018
> 18 to 30 0 - 0,052 +0,040 +0,124 0 +0,021
> 30 to 50 0 - 0,062 +0,050 +0,150 0 +0,025

Table 07: Important tolerances iaw. ISO 3547-1 after press-fitting.

Installation tolerances

iglide® A160- 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.