iglidur® V400 - Material data

Material table

General specification

Unit

iglidur® V400

Test method

density

g/cm³

1,51

Colour

white

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

% by weight

0,1

DIN 53495

max. total moisture absorption

wt.-%

0,2

Sliding friction coefficient, dynamic, against steel

0,15-0,20

pv value, max. (dry)

MPa x m/s

0,50

Mechanical specification

flexural modulus

MPa

4.500

DIN 53457

flexural strength at 20°C

MPa

DIN 53452

Compressive strength

MPa

DIN 53452

maximum recommended surface pressure (20°C)

MPa

Shore D hardness

DIN 53505

Physical and thermal specification

Upper long-term application temperature

°C

+200

Upper short-term application temperature

°C

+240

Lower application temperature

°C

-50

thermal conductivity

W/m x K

0,24

ASTM C 177

coefficient of thermal expansion (at 23°C)

K-1 x 10-5

DIN 53572

Electrical specification

Volume resistivity

Ωcm

> 1012

DIN IEC 93

surface resistance

> 1012

DIN 53482

Without additional load; no sliding movement; relaxation not excluded

Table 01: Material data

Download data sheet

diagram. 01: Permissible pv value for iglidur® V400 plain bearings

iglidur® V400 bearings are not suitable for high pressures or maximum static loads. However, they are characterised by a high wear resistance up to the maximum recommended surface pressure.

Mechanical specification
The maximum recommended surface pressure represents a mechanical material parameter. It is not possible to draw conclusions about the tribology from this. the compressive strength of iglidur® V400 plain bearings decreases with increasing temperatures. diagram 02 illustrates this relationship.

In addition, the limit of the permissible load at +100 °C is still very high at 20 MPa. The high elasticity is also shown in diagram 03.

m/s

rotating

oscillating

linear

continuous

0,9

0,6

short-term

1,3

0,9

Table 02: Maximum surface speed

Permissible sliding speeds
iglidur® Due to its high temperature resistance, V400 also permits high sliding speeds. The very favourable coefficient of friction of the bearing allows maximum sliding speeds of up to 1.3 m/s. The permissible linear speeds are even higher and can reach 3 m/s in the short term.

iglidur® V400

Application temperature

lower

- 50 °C

upper, long-term

+ 200 °C

upper, short-term

+ 240 °C

additional axial protection from

+ 100 °C

Table 03: Temperature limits for iglidur® V400

Temperatures
The maximum long-term permissible application temperature is +200 °C. At temperatures above +100 °C, additional protection is required. Then, however, the wear resistance of the bearing is very good and occupies a top position among alliglidur® materials. The compressive strength of iglidur® V400 bearings decreases with increasing temperatures. This correlation can be seen in diagram.02.

Friction and wear
The coefficient of friction depends on the load on the bearing (diagrams 04 and 05). In addition, the coefficients of friction of iglidur® V400 are very uniform. No other iglidur®® bearing material shows a lower scattering of the coefficient of friction in the laboratory tests, even if the shaft material is changed.

iglidur® V400

dry

Grease

oil

water

coefficient of friction µ

0,15 - 0,20

0,09

0,04

Table 04: coefficient of friction for iglidur® V400 against steel
(Ra = 1 µm, 50 HRC)

diagram. 06: Wear, rotating application with different

Shaft materials
The influence of the shaft material on wear resistance is greater than that of friction. Considerable differences can occur here even at low loads (0.75 MPa), as diagram. 06 shows. iglidur® V400 plain bearings are also superior to swivel bearings in terms of wear in rotating applications (diagram. 07).

Shaft materials

diagram. 07: Wear with oscillating and rotating

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® V400

Chemical resistance
iglidur® V400 bearings have good chemical resistance. They are resistant to cleaning agents, greases, oils, alcohol, solvents, diluted alkalis as well as diluted acids

**
Electrical specification

Volume resistivity

> 1012 Ωcm

surface resistance

> 1012 Ω

Table 06: Electrical specification of iglidur® V400

Radioactive radiation
Bearings made of iglidur® ® V400 are resistant up to a radiation intensity of 2 x 104 Gy. Higher radiation levels attack the mechanical specification.

Maximum moisture absorption

at +23 °C/50 % room humidity.

0.1 % by weight

max. total moisture absorption

0.2 % by weight

Table 06: Moisture absorption

Moisture absorption
The moisture absorption of iglidur® V400 bearings is only 0.2 % when saturated in water.

Diameter****d1 [mm]

shaft h9**[mm]**

iglidur® V400****F10 [mm]

housing H7**[mm]**

to 3

0 - 0,025

+0,006 +0,046

0 +0,010

> 3 to 6

0 - 0,030

+0,010 +0,058

0 +0,012

> 6 to 10

0 - 0,036

+0,013 +0,071

0 +0,015

> 10 to 18

0 - 0,043

+0,016 +0,086

0 +0,018

> 18 to 30

0 - 0,052

+0,020 +0,104

0 +0,021

> 30 to 50

0 - 0,062

+0,025 +0,125

0 +0,025

> 50 to 80

0 - 0,074

+0,030 +0,150

0 +0,030

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

Installation tolerances
iglidur® V400 plain bearings are standard bearings for shafts with a tolerance (recommended minimum h9) and are designed for press-fitting into an H7-toleranced mounting. After installation in a mounting with nominal dimensions, the inner diameter of the bearing with F10 tolerance adjusts itself. For certain dimensions, the tolerance deviates from this depending on the wall thickness (see product range).