iglidur® A500 - Material data

Material data table

General properties	Unit	iglidur® A500	Testing method
Density	g/cm³	1.28
Colour		brown
Max. moisture absorption at +23°C/50% room humidity	% weight	0.3	DIN 53495
Max. moisture absorption	% weight	0.5
Geothermal friction coefficient, dynamic, against steel	µ	0,26-0,41
pv value, max. (dry)	Mpa x m/s	0.28
Mechanical properties
Flexural modulus	MPa	3,600	DIN 53457
Flexural strength at 20°C	MPa	140	DIN 53452
Compressive strength	MPa	118
Maximum recommended surface pressure (20°C)	MPa	120
Shore D hardness	MPa	83	DIN 53505
Physical and thermal properties
Max. long-term application temperature	°C	+250
Max. short-term application temperature	°C	+300
min. application temperature	°C	-100
Thermal conductivity	W/m x K	0.24	ASTM C 177
Coefficient of thermal expansion (at 23°C)	K^-1 x 10^-5	9	DIN 53752
Electrical properties
Specific transitional resistance	Ωcm	> 10¹⁴	DIN IEC 93
Surface resistance	Ω	> 10¹³	DIN 53482

Download data sheet

Diagram 01: Permissible pv values for iglidur® A500 with a wall thickness of 1mm dry operation against a steel shaft at +20°C, mounted in a steel housing

Bearings made of iglidur® A500 can be used at high temperatures and are approved for direct contact with food (FDA-compliant). They have an exceptionally good chemical resistance and are thus suitable for the most difficult applications in the environment of machines for the food industry. Although iglidur® A500 is a tough material, it also has excellent compressive strength, even at high temperatures.

diagram. 02: maximum recommended surface pressure as a function of temperature (120 MPa at +20 °C)

Mechanical specification

The maximum recommended surface pressure is a mechanical material parameter. It cannot be used to draw conclusions about the tribology. The compressive strength of iglidur® A500 plain bearings decreases with increasing temperatures. diagram. 02 illustrates this relationship.

diagram. 02 shows the maximum recommended surface pressure of the bearing as a function of temperature. The combination of high strength on the one hand and high flexibility on the other has a very positive effect on vibrations and edge loads. As the wear of the plain bearings increases rapidly from pressures of 10 to 20 MPa, we recommend that the use above these limits is checked particularly carefully.

Diagram 03: Deformation under pressure and temperature

Permissible sliding speeds

iglidur® Due to its high temperature resistance, A500 also permits high sliding speeds. However, the coefficient of friction increases due to these high speeds, which leads to higher heating of the bearing. Tests show that plain bearings made of iglidur® A500 are more wear-resistant during swivelling movements, and the permissible pv values are also higher in swivelling operation.

Maximum surface speed

m/s	Rotating	Oscillating	linear
permanent	0.6	0.4	1
Short-term	1	0.7	2

Surface Speedp x v value and lubrication

Temperatures

The maximum permissible short-term application temperature is +300 °C. The compressive strength of iglidur® A500 plain bearings decreases with increasing temperatures. diagram. 02 illustrates this relationship. The temperatures prevailing in the bearing system also have an influence on bearing wear.

iglidur® A500	Application temperature
Minimum	- 100 °C
Max. long-term	+250°C
Maximum, short-term	+ 300 °C
In addition secure axially from	+130°C

Temperatures, coefficient of thermal expansion

Friction and wear

The coefficient of friction depends on the load acting on the bearing (diagram. 04 and 05).

coefficient of friction for iglidur® A500 against steel (Ra = 1 μm, 50 HRC):

iglidur® A500	dry	Greases	Oil	Water
Coefficients of friction µ	0,26 - 0,41	0.09	0.04	0.04

Diagram 04: Coefficient of friction as a function of the surface speed, p = 0.75MPa

further information:

Surface Speedp x v value and lubrication

Diagram 05: Coefficient of friction as a function of the pressure, v = 0.01m/s

iglidur® A500

diagram. 06: Wear, rotating application with

Shaft materials

Diagram 06 shows an extension of the results of tests with different shaft materials that were carried out with plain bearings made from iglidur® A500. The combination "iglidur® A500 against hard chrome-plated shaft" clearly stands out during rotation. Up to approx. 2.0 MPa, the wear of this combination remains largely load-independent. When swivelling against shafts made of Cf53, the wear resistance is better than when rotating under the same load. If the shaft material you require is not included in this diagram, please contact us.

Shaft materials

diagram. 07: Wear with oscillating and rotating

Properties

Chemical resistance

iglidur® A500 plain bearings have excellent resistance to cleaning agents, greases, oils, alkalis and acids.

+ resistant 0 conditionally resistant - not resistant
All data at room temperature [20 °C]

Medium	Resistance
Alcohols	+
Hydrocarbons	+
Greases, oils without additives	+
Fuels	+
Diluted acids	+
Strong acids	+
Diluted alkalines	+
Strong alkalines	+

Radioactive radiation

Bearings made from iglidur® A500 are among the most radiation-resistant in the iglidur®programme.The bearings are resistantup to a radiation intensity of 2 x105Gy. Higher radiation levels attack the material and can lead to the loss of important mechanical specifications.

Electrical specification

iglidur® A500 plain bearings are electrically insulating.

Electrical properties
Specific transitional resistance	> 10¹⁴ Ωcm
Surface resistance	> 10¹³ Ω

Moisture absorption

The moisture absorption of iglidur® A500 bearings is only 0.5 % when saturated in water.

Maximum moisture absorption
at +23 °C/50 % r. humidity	0.3% weight
Max. moisture absorption	0.5% weight

Installation tolerances

iglidur® A500 plain bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed to be pressed into an H7-toleranced mounting. After installation in a mounting with nominal dimensions, the inner diameter of the bearing with F10 tolerance adjusts itself automatically.

Diameter d1 [mm]	Shaft h9 [mm]	iglidur® A500 F10 [mm]	Housing H7 [mm]
up to 3	0 - 0.025	+0.006 +0.046	0 +0.010
> 3 up to 6	0 - 0.030	+0.010 +0.058	0 +0.012
> 6 up to 10	0 - 0.036	+0.013 +0.071	0 +0.015
> 10 up to 18	0 - 0.043	+0.016 +0.086	0 +0.018
> 18 up to 30	0 - 0.052	+0.020 +0.104	0 +0.021
> 30 up to 50	0 - 0.062	+0.025 +0.125	0 +0.025
>50 to 80	0 - 0.074	+0.030 +0.150	0 +0.030