iglidur® UW160 - Material data

Material table

General specification

Unit

iglidur® UW160

Test method

density

g/cm³

1,04

Colour

grey

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

0,17 - 0,31

pv value, max. (dry)

MPa x m/s

0,22

Mechanical specification

flexural modulus

MPa

1.349

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]

0,50

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

Download data sheet

iglidur® UW160 was specifically developed with a view to maximum wear resistance in continuous operation with media circulation. In such applications, low radial loads and moderate temperatures generally occur, and the suitability for contact with drinking water and the very good media resistance round off the property profile.

Mechanical specification
The compressive strength ofiglidur® UW160 bearings decreases with increasing temperatures. diagram. 02 illustrates this correlation. The maximum recommended surface pressure represents a mechanical material parameter. Conclusions on the tribology cannot be drawn from this.

diagram. 03 shows how iglidur® UW160 deforms elastically under radial load.

m/s

rotating

oscillating

linear

continuous

0,3

short-term

0,5

0,4

2,5

Table 02: Maximum surface speed

Permissible sliding speeds
The maximum permissible surface speed depends on the frictional heat generated at the bearing point.The temperature should only rise to a value that still ensures a sensible spherical insert bearing in terms of wear and dimensional accuracy.The maximum values given in Table 02 apply to dry operation. Depending on the installation situation, significantly higher speeds can be realised in media-flushed applications due to reduced heat generation.

iglidur® UW160

Application temperature

lower

- 50 °C

Upper, long-term

+ 90 °C

upper, short-term

+ 100 °C

additional axial protection from

+ 70 °C

Table 03: Temperature limits

Temperatures
iglidur® UW160 was developed for use in liquid media in the normal and medium temperature range. As with all thermoplastics, the compressive strength of iglidur® UW160 decreases with increasing temperatures. The temperatures prevailing in the bearing system also have an influence on the bearing wear. Wear increases with rising temperatures. Additional protection is required at temperatures higher than +70 °C.

friction and wear
The influence of surface speed and shaft roughness on the coefficient of friction is low, but the coefficient of friction decreases significantly with increasing radial load, especially in the range up to 7.5 MPa.

iglidur® UW160

dry

Grease

oil

water

coefficient of friction µ

0,17 - 0,31

0,08

0,03

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

Wear, rotating applications with different

Shaft materials
diagram. 06 shows an extension of the results of tests with different shaft materials that were carried out with iglidur® UW160 plain bearings in dry operation. using the example of a rotational movement with radial loads of 1 MPa and a speed of 0.3 m/s, it is clear that iglidur® UW160 achieves good wear values with a wide variety of shafts, except for the pairing with 304 SS shafts. it is also clear that there are iglidur® materials that are more suitable for dry operation. As with numerous other iglidur® materials in dry operation, Fig. 07 shows the significantly higher wear during rotation compared to swivelling with otherwise identical parameters.

Shaft materials

Wear in oscillating and rotating applications

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® UW160 plain bearings have very good resistance to chemicals. iglidur® UW160 is just as resistant to most organic and inorganic acids as it is to alkalis or lubricants.

**
Electrical specification

Volume resistivity

> 1012 Ωcm

surface resistance

> 1012 Ω

iglidur® UW160 plain bearings are electrically insulating.

Radioactive radiation
Bearings made of iglidur® UW160 are resistant to radiation up to a radiation intensity of 3 - 102 Gy.

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 moisture absorption of iglidur® UW160 bearings is 0.1 % in a normal climate. The saturation limit in water is also only 0.1 %.

Diameter****d1 [mm]

shaft h9**[mm]**

iglidur® UW160****E10 [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

> 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 to 180

0 - 0,100

+0,085 +0,245

0 +0,040

Table 07: Important tolerances according to ISO 3547-1 after press-fitting

Installation tolerances
iglidur® UW160 bearings are standard bearings for shafts with h-tolerance (recommended at least h9). The bearings are designed for press-fitting into an H7-toleranced mount; after installation in a mount with nominal dimension, the inner diameter of the bearing adjusts itself in the standard case with E10 tolerance.