iglidur® A160 - Material data

Material table

General specification

Unit

iglidur® A160

Test method

density

g/cm³

1,0

Colour

blue colour

max. Moisture absorption at 23°C/50% room humidity.

% by weight

0,1

DIN 53495

max. total moisture absorption

wt.-%

0,1

Sliding friction coefficient, dynamic, against steel

0,09 - 0,19

pv value, max. (dry)

MPa x m/s

0,25

Mechanical specification

flexural modulus

MPa

1.151

DIN 53457

flexural strength at 20°C

MPa

DIN 53452

Compressive strength

MPa

maximum recommended surface pressure (20°C)

MPa

Shore D hardness

DIN 53505

Physical and thermal specification

Upper long-term application temperature

°C

+90

upper short-term application temperature

°C

+100

Lower application temperature

°C

-50

thermal conductivity

[W/m x K]

0,30

ASTM C 177

coefficient of thermal expansion (at 23°C)

[K-1 x 10-5]

DIN 53752

Electrical specification

Volume resistivity

Ωcm

> 1012

DIN IEC 93

surface resistance

> 1012

DIN 53482

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iglidur® A160 bearings are characterised by extreme media resistance at low costs. Tribologically optimised, the material can be used up to +90 °C and also has the conformities required in the food processing sector. The property profile is rounded off by the "optical detectability" often desired in the industry, i.e. the blue colour.

Mechanical specification
The compressive strength of iglidur® A160 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 03 shows the elastic deformation of iglidur® A160 under radial load. Under the maximum recommended surface pressure of 15 MPa, the deformation is less than 3.0 %. Plastic deformation can be neglected up to this radial load. However, it also depends on the duration of the load.

m/s

rotating

oscillating

linear

continuous

0,5

0,4

short-term

0,7

0,6

Table 02: Maximum surface speed

Permissible sliding speeds
iglidur® A160 has been developed for low sliding speeds. In dry operation, a maximum of 0.5 m/s (rotating) or 2.0 m/s (linear) is permitted for continuous use.The values given in Table 02 indicate the limits at which frictional heat causes an increase to the permanently permissible temperature.In practice, these limit values cannot always be achieved due to interactions.

iglidur® A160

Application temperature

lower

- 50 °C

upper, long-term

+ 90 °C

upper, short-term

+ 100 °C

additional axial protection from

+ 60 °C

Table 03: Temperature limits

Temperatures
The compressive strength of iglidur® A160 bearings decreases with increasing temperatures. diagram 02 illustrates this correlation. The temperatures prevailing in the bearing system also have an influence on bearing wear, and additional protection is required at temperatures higher than +60 °C.

friction and wear
The coefficient of friction and wear resistance change with the application parameters. With iglidur® A160 plain bearings, the change in the coefficient of friction μ as a function of the surface speed is only slightly pronounced. However, the coefficient of friction decreases significantly with increasing load. The optimum shaft roughness with regard to the coefficient of friction is 0.6-0.7 Ra.

iglidur® A181

dry

Grease

oil

water

coefficient of friction µ

0,09 - 0,19

0,08

0,03

0,04

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

diagram. 06: Wear, rotating application with different

Shaft materials
diagram. 06 shows an extension of the results of tests with different shaft materials that were carried out with iglidur®® A160 bearings in dry operation. For rotation with low load, the particularly interesting, media- and corrosion-resistant shaft materials 304 SS, high grade steel and hard chrome-plated steel prove to be good mating partners. However, wear increases most rapidly with load on high grade steel shafts (diagram.06). On Cf53 shafts, the wear in swivelling applications is exemplary in comparison to rotation. In rotation, as with many other iglidur®® materials, the wear is higher than in swivelling (diagram. 07).

Shaft materials

diagram. 07: Wear with oscillating and rotating

Medium

Resistance

Alcohols

hydrocarbons

Greases, oils, not additivated

Fuels

+ to 0

Diluted acids

strong acids

Diluted bases

strong bases

+ resistant 0 conditionally resistant - unstable
All data at room temperature [+20 °C]
Table 05: chemical resistance

chemical resistance
iglidur® A160 plain bearings can be used under a wide range of environmental conditions and in contact with numerous chemicals. Table 05 provides an overview of the chemical resistance of iglidur® A160 plain bearings at room temperature.

**
Electrical specification

Volume resistivity

< 1012 Ωcm

surface resistance

< 1012 Ω

iglidur® A160 plain bearings are electrically insulating.

Radioactive radiation
Bearings made from iglidur® A160 are resistant to radiation up to a radiation intensity of 1 - 105 Gy. Higher radiation levels attack the material and can lead to the loss of important mechanical specifications.

Maximum moisture absorption

at +23 °C/50 % room humidity.

0.1 % by weight

max. total moisture absorption

0.1 % by weight

Table 06: Moisture absorption

Moisture absorption
The iglidur® A160 bearings absorb up to 0.1 % water due to humidity (+23 °C, 50 % relative humidity); when saturated with water, only0.1 % is also absorbed.

Diameter****d1 [mm]

shaft h9**[mm]**

iglidur® A160****F10 [mm]

housing H7**[mm]**

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 according to ISO 3547-1 after press-fitting

Installation tolerances
iglidur® A160 bearings are standard bearings for shafts with tolerance (recommended at least h9) The bearings are designed for press-fitting into aH7-tolerated mount. After installation in a mounting with nominal dimension, the inner diameter of the bearing with E10 tolerance adjusts itself.