iglidur® Q2 - Material data

Material table

General specification

Unit

iglidur® Q2

Test method

density

g/cm³

1,46

Colour

beige-brown

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

% by weight

1,1

DIN 53495

max. total moisture absorption

wt.-%

4,6

Sliding friction coefficient, dynamic, against steel

0,22 - 0,42

pv value, max. (dry)

MPa x m/s

0,7

Mechanical specification

flexural modulus

MPa

8.370

DIN 53457

flexural strength at 20°C

MPa

240

DIN 53452

Compressive strength

MPa

130

maximum recommended surface pressure (20°C)

MPa

120

Shore D hardness

DIN 53505

Physical and thermal specification

Upper long-term application temperature

°C

+130

Upper short-term application temperature

°C

+200

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 53752

Electrical specification

Volume resistivity

Ωcm

> 1013

DIN IEC 93

surface resistance

> 1011

DIN 53482

Table 01: Material data

Download data sheet

iglidur® Q2 plain bearings represent high load capacities and good abrasion resistance at high loads. The price-performance ratio is outstanding. Solid lubricants reduce the coefficient of friction and improve resistance to wear, which is much better than other iglidur® plain bearings, especially for heavily loaded pivoting applications.

Mechanical specification
The compressive strength of iglidur® Q2 plain bearings decreases with increasing temperatures. diagram. 02 illustrates this relationship. At the long-term permissible application temperature of +130 °C, the permissible surface pressure is still 20 MPa. iglidur® Q2 plain bearings stand for high load carrying capacity and good abrasion resistance at high loads.

diagram. 03 shows the elastic deformation of iglidur® Q2 under radial load.

Maximum surface speed

m/s

rotating

oscillating

linear

continuous

0,7

short-term

1,4

Table 02: Maximum surface speed

Permissible sliding speeds
The typical applications for iglidur® Q2 bearings are highly loaded swivelling movements with rather low speeds. The speeds specified in Table 02 are limit values for the lowest bearing loads. At higher loads, the permissible speed decreases with the load due to the limitations imposed by the pv value.

Temperature limits

iglidur® Q2

Application temperature

lower

- 40 °C

Upper, long-term

+ 130 °C

upper, short-term

+ 200 °C

additional axial protection from

+ 70 °C

Table 03: Temperature limits for iglidur® Q2

Temperatures
iglidur® Q2 is a very temperature-resistant material.The upper long-term application temperature of +130 °C permits extensive use, e.g. in typical applications in the agricultural, commercial vehicle or construction vehicle sector.However, the compressive strength of iglidur® Q2 bearings decreases with increasing temperatures. Additional protection is required at temperatures higher than +70 °C. In temperature considerations, the additional frictional heat in the bearing system must be taken into account.

Friction and wear
The coefficient of friction of iglidur® Q2 is low. It must be noted that a sliding partner that is too rough increases the friction. The highest coefficient of friction is achieved atRa = 1 μm. We recommend shaft roughness (Ra) of0.1 to a maximum of 0.4 μm. The coefficient of friction of the iglidur® Q2 plain bearing also depends to a large extent on the speed and load. As the sliding speed increases, the coefficient of friction also rises rapidly. With the load, on the other hand, the coefficient of friction initially decreases significantly, then gradually.

Shaft materials
The use of hardened shafts is generally recommended in the high-load range. iglidur® Q2 also achieves a longer service life with "hard" shafts than with "soft" ones, even at low to medium loads.

But even with free-cutting steel, the results in the low load range are excellent; at high loads, the wear in swivelling applications is significantly lower than in rotation. If the shaft material you intend to use is not included in the test results presented here, please contact us.

Shaft materials

Medium

Resistance

Alcohols

hydrocarbons

Greases, oils, not additivated

fuels

Diluted acids

0 to -

strong acids

Dilute bases

strong bases

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

Chemical resistance
iglidur® Q2 plain bearings have good resistance to chemicals. They are resistant to most lubricants. Only resistance to acids is limited.

**
Electrical specification

Volume resistivity

> 1013 Ωcm

surface resistance

> 1011 Ω

Radioactive radiation
Bearings made of iglidur® Q2 are resistant to radiation up to a radiation intensity of 3 x 102 Gy.

Maximum moisture absorption

at +23 °C/50 % room humidity.

1.1 % by weight

max. total moisture absorption

4.6 % by weight

Table 06: Moisture absorption of iglidur® Q2

Moisture absorption
The moisture absorption of iglidur® Q2 bearings is less than 1.1 % in a normal climate. The saturation limit in water is 4.6 %.

Diameter****d1 [mm]

shaft h9**[mm]**

iglidur® Q2****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® Q2 plain bearings are standard bearings for shafts with tolerance (recommended minimum h9).

The bearings are designed for press-fitting into a h7-toleranced mounting. After installation in a mounting with nominal dimensions, the inner diameter of the bearing with E10 tolerance is automatically adjusted. For certain dimensions, the tolerance deviates depending on the wall thickness (see product range).