iglidur® A500 - material data

The most important specifications at a glance

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

Descriptive technical specifications
Wear resistance at +23°C	- 🟧 🟧 ⬜️ ⬜️ ⬜️ +	More information on wear resistance
Wear resistance at +90°C	- 🟧 🟧 ⬜️ ⬜️ ⬜️ +
Wear resistance at +150°C	- 🟧 🟧 🟧 ⬜️ ⬜️ +
Slide property	- 🟧 🟧 ⬜️ ⬜️ ⬜️ +	Coefficient of friction, dynamic, against steel: µ 0.26 - 0.41
Wear resistance under water	- 🟧 🟧 🟧 🟧 ⬜️ +
Media resistance	- 🟧 🟧 🟧 🟧 🟧 +	More information on media resistance
Resistant to edge pressures	- 🟧 🟧 🟧 🟧 ⬜️ +
Impact and edge pressure	- 🟧 🟧 🟧 🟧 ⬜️ +
Dirt resistance	- 🟧 🟧 🟧 ⬜️ ⬜️ +

When do I use this material?

When FDA conformity is required
When very high chemical resistance is required
Good abrasion resistance
Temperature resistant from -100°C to +250°C

When do I use a different material

If maximum wear resistance is required -> iglidur X6, iglidur Z
When high temperature and chemical resistance is not required -> iglidur A180, iglidur A200
If a cost-effective universal-plain bearing is required -> iglidur G, iglidur P

Download data sheet

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
Coefficient of geothermal friction, dynamic, against steel	µ	0.26-0.41
pv value, max. (dry)	Mpa xm/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

Temperatures

In the short-term, iglidur A500 plain bearings can be used at temperatures of up to +300°C. The compressive strength of iglidur A500 plain bearings decreases with increasing temperatures. The temperatures prevailing in the bearing system also have an influence on bearing wear. At temperatures above +130°C, additional safety device is required.

Temperatures, coefficient of thermal expansion

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

Permissible surface speeds

iglidur A500 also allows high surface speeds due to its high temperature resistance. However, the coefficient of friction increases due to this high speed, which leads to higher heating of the bearing. Tests show that plain bearings made of iglidur A500 are more resistant to wear during pivoting movements, and the permissible pv value is also higher in pivoting operation.

Surface speeds of different iglidur materials

Maximum surface speed [m/s]	Rotating	Oscillating	linear
permanent	0.6	0.4	1.0
Short-term	1.0	0.7	2.0

Permissible pv values

pv value, max. (dry)

MPa - m/s

0,28

Information on pv value and lubrication

Mechanical specifications

The compressive strength of iglidur A500 plain bearings decreases with increasing temperatures. Diagram 02 illustrates this relationship. The maximum recommended surface pressure represents a mechanical material parameter. Conclusions about the tribology cannot be drawn from this. 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 bearing increases rapidly from pressures of 10 to 20MPa, we recommend that the use above these limits is checked very carefully.

Friction and wear

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

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

iglidur A500	dry	Greases	Oil	Water
Coefficient of friction µ	0.26 - 0.41	0.09	0.04	0.04

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. The wear of this combination remains largely load-independent up to approx. 2.0MPa. 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.

Further information on shaft materials

Chemical resistance

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

+ resistant 0 conditionally resistant - non-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	+

Moisture absorption

The moisture absorption of iglidur A500 plain 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

Electrical properties

iglidur A500 plain bearings are electrically insulating.

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

Installation tolerances

iglidur A500 plain bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed for press-fit into a housing machined to a H7 tolerance. After being assembled into a nominal size housing, in standard cases the inner diameter automatically adjusts to the F10 tolerances.

Diameter d1 [mm]	Shaft h9 [mm]	iglidur A500 plain bearing 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
>80 to 120	0 - 0.087	+0.036 +0.176	0 +0.035
> 120 up to 180	+0.100 + 0	+0.043 +0.203	0 +0.040