iglidur® T220 - Material data

Material table

General specification

Unit

iglidur® T220

Test method

density

g/cm³

1,28

Colour

white

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

% by weight

0,3

DIN 53495

max. total moisture absorption

wt.-%

0,5

Sliding friction coefficient, dynamic, against steel

0,20-0,32

pv value, max. (dry)

MPa x m/s

0,28

Mechanical specification

flexural modulus

MPa

1.800

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

+100

upper short-term application temperature

°C

+160

Lower application temperature

°C

-40

thermal conductivity

W/m x K

0,24

ASTM C 177

coefficient of thermal expansion (at 23°C)

K-1 x 10-5

DIN 53753

Electrical specification

Volume resistivity

Ωcm

> 1010

DIN IEC 93

surface resistance

> 1010

DIN 53482

Without additional load; no sliding movement; relaxation not excluded

Table 01: Material data

Download data sheet

iglidur® T220 is a special material for use in the tobacco processing industry. It fulfils the requirements of the tobacco industry (engineering database). The material is free of undesirable or prohibited ingredients, as required by well-known manufacturers of tobacco products according to the 2004 trade show.

Mechanical specification
The maximum recommended surface pressure represents a mechanical material parameter. The compressive strength of iglidur® T220 plain bearings decreases with increasing temperatures. diagram 02 illustrates this relationship.

iglidur® T220 plain bearings can be loaded up to the permissible limit of 45 MPa. The deformation is then almost 2%. The permissible load is further limited by higher temperatures (diagram. 02).

Maximum surface speed

m/s

rotating

oscillating

linear

continuous

0,4

0,3

short-term

0,7

Table 02: Maximum surface speed

Permissible sliding speeds
The maximum surface speed of iglidur® T220 plain bearings is 0.4 m/s when rotating continuously. Friction and the associated heating limit the permissible speeds. This means that higher speeds can be used in intermittent or linear operation.

iglidur® T220

Application temperature

below

- 40 °C

upper, long-term

+ 100 °C

upper, short-term

+ 160 °C

additional axial protection from

+ 50 °C

Table 03: Temperature limits for iglidur® T220

Temperatures
The flexibility of the bearing depends on the temperature. 60 °C already leads to a significant increase in elasticity. Mechanical securing should be carried out from +50 °C.

Friction and wear
By complying with the specifications of the tobacco processing industry, the friction and wear values of the iglidur® T220 bearings clearly lag behind those of the bestiglidur® bearings. the coefficient of friction decreases with the load, while it only increases slightly at higher speeds.

iglidur® T220

dry

Grease

oil

water

coefficient of friction µ

0,2 - 0,32

0,09

0,04

Table 04: coefficient of friction for iglidur® T220 against steel (Ra = 1 μm, 50 HRC)

Wear, rotating application with undercut.

Shaft materials
Diagram 06 shows test results with different shaft materials, which were carried out with plain bearings made from iglidur® T220.
diagram. 07 shows that the bearings react with a strong increase in wear when the load is increased. Care should therefore be taken to keep the load below 5 MPa by dimensioning the bearing sufficiently.

Shaft materials

Medium

Resistance

Alcohols

hydrocarbons

Greases, oils, not additivated

fuels

Diluted acids

strong acids

diluted bases

strong bases

+ resistant 0 conditionally resistant - not resistant
All data at room temperature [+20 °C]Table 05: chemical resistance of iglidur® T220

Chemical resistance
iglidur® T220 plain bearings are resistant to highly diluted alkalis and very weak acids.

**
Electrical specification

Volume resistivity

> 1010 Ωcm

surface resistance

> 1010 Ω

Radioactive radiation
Bearings made of iglidur® T220 are resistant to radiation up to a radiation intensity of 3 x 10² Gy.

Maximum moisture absorption

at +23 °C/50 % room humidity.

0.3 % by weight

max. total moisture absorption

0.5 % by weight

Table 06: Moisture absorption of iglidur® T220

Moisture absorption
The moisture absorption of iglidur® T220 bearings is about 0.3 % in a normal climate. The saturation limit in water is 0.5 %. These values are so low that consideration of swelling due to moisture absorption is only necessary in extreme cases.

Diameter****d1 [mm]

shaft h9**[mm]**

iglidur® T220****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 for iglidur® T220 plain bearings according to ISO 3547-1 after press-fitting

Mounting tolerances
iglidur® T220 bearings are standard bearings for shafts with h-tolerance (recommended minimum h9) and are designed to be pressed into a housing bore with H7 tolerance.

After installation in a housing bore with H7 tolerance, the inner diameter of the bearing with E10 tolerance adjusts itself automatically.

Consulting

I look forward to answering your questions

Stefan Hemmersbach

Product Manager iglidur® bearings

+49 (0) 2203 9649 145 Write e-mail

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