iglidur® A180 - material data

The most important specifications at a glance

Plain bearings made from iglidur A180 are suitable for application in direct contact with food. They are the ideal solution for bearing points on machines for the food and packaging industry, medical equipment manufacturing, small household appliances, etc. Even where wet cleaning contact occurs, the iglidur A180 is characterised by the lowest moisture absorption.

Descriptive technical specifications
Wear resistance at +23°C	- 🟧 🟧 🟧 ⬜️ ⬜️ +	More information on wear resistance
Wear resistance at +90°C	- 🟧 ⬜️ ⬜️ ⬜️ ⬜️ +
Wear resistance at +150°C	- 🟧 ⬜️ ⬜️ ⬜️ ⬜️ +
Sliding properties	- 🟧 🟧 🟧 ⬜️ ⬜️ +	Coefficient of friction, dynamic, against steel: µ 0.05 - 0.23
Wear resistance under water	- 🟧 🟧 ⬜️ ⬜️ ⬜️ +
Media resistance	- 🟧 🟧 🟧 🟧 ⬜️ +	More information on media resistance
Resistant to edge pressures	- 🟧 🟧 🟧 🟧 ⬜️ +
Resistant to shock and impact loads	- 🟧 🟧 🟧 🟧 ⬜️ +
Dirt resistance	- 🟧 🟧 🟧 🟧 ⬜️ +

When do I use this material?

When my bearings come into direct contact with food
When FDA conformity is required
When quiet operation is important
When low moisture absorption is required

When do I use a different material?

If only the highest wear resistance is required -> iglidur J
When temperatures permanently exceed +80°C -> iglidur A350, iglidur A500
When a cost-effective universal-plain bearing is required -> iglidur G, iglidur P

Download data sheet

Material data table

General properties	Unit	iglidur® A180	Testing method
Density	g/cm³	1.46
Colour		white
Max. moisture absorption at +23°C/50% room humidity	% weight	0.2	DIN 53495
Max. moisture absorption	% weight	1.3
Coefficient of sliding friction, dynamic against steel	µ	0.05 - 0.23
pv value, max. (dry)	MPa x m/s	0.31
Mechanical properties
Flexural modulus	MPa	2,300	DIN 53457
Flexural strength at 20°C	MPa	88	DIN 53452
Compressive strength	MPa	78
Maximum recommended surface pressure (20°C)	MPa	28
Shore D hardness		76	DIN 53505
Physical and thermal properties
Max. long-term application temperature	°C	+90
Max. short-term application temperature	°C	+110
min. application temperature	°C	-50
Thermal conductivity	[W/m x K]	0.25	ASTM C 177
Coefficient of thermal expansion (at 23°C)	[K^-1 x 10^-5	11	DIN 53752
Electrical properties
Specific transitional resistance	Ωcm	> 10¹²	DIN IEC 93
Surface resistance	Ω	> 10¹¹	DIN 53482

Temperatures

The upper short-term application temperature is +110°C. The compressive strength of iglidur A180 plain bearings decreases with increasing temperatures. The temperatures prevailing in the bearing system also have an influence on bearing wear. Additional protection is required at temperatures higher than +60°C.

Temperatures, coefficient of thermal expansion

iglidur A180	Application temperature
Minimum	-50°C
Max. long-term	+90°C
Maximum, short-term	+110°C
In addition secure axially from	+60°C

Permissible surface speeds

iglidur A180 has been developed for low surface speeds. In dry operation, a maximum of 0.8m/s (rotating) or 3.5m/s (linear) is permitted for continuous use. The values given in the table indicate the limits at which frictional heat causes an increase up to the permanently permissible temperature. In practice, these limit values cannot always be achieved due to interactions.

Surface speeds of various iglidur materials

Maximum surface speeds [m/s]	Rotating	Oscillating	linear
permanent	0.8	0.6	3.5
Short-term	1.2	1.0	5.0

Permissible pv values

Pv value, max. (dry)

MPa ·m/s

0.31

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Mechanical specifications

The maximum recommended surface pressure is a mechanical material parameter. Conclusions about the tribology cannot be drawn from this. The compressive strength of iglidur A180 plain bearings decreases with increasing temperatures. Diagram 02 illustrates this relationship. Diagram 03 shows the elastic deformation of iglidur A180 under radial load. Under the maximum recommended surface pressure of 20MPa, the deformation is less than 2.5%. Plastic deformation can be neglected up to this radial load. However, it also depends on the duration of the impact.

Friction and wear

Coefficient of friction and wear resistance change with the application parameters. However, the coefficient of friction decreases significantly with increasing load (diagrams 04 and 05).

Coefficients of friction for iglidur A180 against steel (Ra = 1μm, 50 HRC):

iglidur A180	dry	Greases	Oil	Water
Coefficient of friction µ	0.05 - 0.23	0.09	0.04	0.04

Shaft materials

Diagram 06 shows test results with different shaft materials, which were carried out with plain bearings made from iglidur A180. The combination "iglidur A180/hard anodised aluminium shaft" clearly stands out. However, good to very good wear rates are also achieved on other shafts. Cf53 shafts are an example of the higher wear in swivelling applications compared to rotation (diagram 07).

Further information on shaft materials

Chemical resistance

iglidur A180 plain bearings can be used under a wide range of environmental conditions and in contact with numerous chemicals. The table provides an overview of the chemical resistance of iglidur A180 plain bearings at room temperature.

+ resistant 0 conditionally resistant - non-resistant
All data at room temperature [+20 °C]

Medium	Resistance
Alcohols	+
Hydrocarbons	+
Greases, oils without additives	+
Fuels	+
Diluted acids	0 to -
Strong acids	-
Diluted alkalines	+
Strong alkalines	+ up to 0

Moisture absorption

The iglidur A180 plain bearing absorbs up to 0.2% water when exposed to humidity (+23°C, 50% relative humidity), and up to 1.3% when saturated with water.

Maximum moisture absorption
at +23°C/50% r. humidity	0.2% weight
Max. moisture absorption	1.3% weight

Electrical properties

iglidur A180 plain bearings are electrically insulating.

Electrical properties
Specific transitional resistance	> 10¹² Ωcm
Surface resistance	> 10¹¹ Ω

Installation tolerances

iglidur A180 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, the inner diameter automatically adjusts to the E10 tolerances.

Diameter d1 [mm]	Shaft h9 [mm]	iglidur A180 F10 [mm]	Housing H7 [mm]
up to 3	0 - 0.025	+0.014 +0.054	0 +0.010
> 3 up to 6	0 - 0.030	+0.020 +0.068	0 +0.012
> 6 up to 10	0 - 0.036	+0.025 +0.083	0 +0.015
> 10 up to 18	0 - 0.043	+0.032 +0.102	0 +0.018
> 18 up to 30	0 - 0.052	+0.040 +0.124	0 +0.021
> 30 up to 50	0 - 0.062	+0.050 +0.150	0 +0.025
>50 to 80	0 - 0.074	+0.060 +0.180	0 +0.030
>80 to 120	0 - 0.087	+0.072 +0.212	0 +0.035
> 120 up to 180	0 - 0.100	+0.085 +0.245	0 +0.040