iglidur® H4 - Material data

Maximum surface speed

m/s

rotating

oscillating

linear

continuous

1

0,7

1

short-term

1,5

1,1

2

Table 02: Maximum surface speed

Permissible sliding speeds
Compared to the cost-effective iglidur® H2 plain bearings, iglidur® H4 has a much more favourable friction coefficient. This is the reason for the higher permissible sliding speeds that can be achieved with these bearings.
1 m/s. The speeds given 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 of thepv value.

iglidur® H4

Application temperature

below

- 40 °C

upper, long-term

+ 200 °C

upper, short-term

+ 240 °C

additional axial protection from

+ 110 °C

Table 03: Temperature limits for iglidur® H4

Temperatures
iglidur® H4 is a temperature-resistant material, which is why iglidur® H4 plain bearings can be used in applications in which bearings are subjected to a drying process without further load. However, the compressive strength ofiglidur® H4 bearings decreases with increasing temperatures. The additional frictional heat in the bearing system must be taken into account. Additional protection is required at temperatures higher than +110 °C.

Medium

Resistance

Alcohols

hydrocarbons

Greases, oils, not additivated

fuels

Diluted acids

+ to 0

strong acids

+ to -

Dilute bases

strong bases

+ resistant 0 conditionally resistant - not resistant
All data at room temperature [+20 °C]
Table 05: chemical resistance of iglidur® H4

Chemical resistance
iglidur® H4 plain bearings have good resistance to chemicals. They are resistant to most lubricants.
Most weak organic and inorganic acids do not attack iglidur® H4.

**
Electrical specification

Volume resistivity

> 1013 Ωcm

surface resistance

> 1012 Ω

Radioactive radiation
iglidur® H4 resists both neutron and gamma particle radiation without any noticeable loss of its excellent mechanical specification.
Bearings made of iglidur® H4 are radiation-resistant up to a radiation intensity of 2 - 102 Gy.

max. Moisture absorption

at +23 °C/50 % room humidity.

0.1 % by weight

max. total moisture absorption

0.2 % by weight

Table 06: Moisture absorption of iglidur® H4

The moisture absorption of iglidur® H4 bearings is less than 0.1 % in a normal climate. The saturation limit in water is 0.2 %. iglidur® H4 is therefore the ideal material for wet environments.

Diameter****d1 [mm]

shaft h9**[mm]**

iglidur® H4****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 for iglidur® H4 plain bearings according to ISO 3547-1 after press-fitting

Installation tolerances
iglidur® H4 plain bearings are standard bearings for shafts with tolerance (recommended minimum h9).

The bearings are designed to be pressed into anH7-toleranced mounting. After installation in a mounting with nominal dimensions, the inner diameter of the bearing with F10 tolerance is automatically adjusted; for certain dimensions, the tolerance deviates from this depending on the wall thickness (see product range).