iglidur® X - Material data

The most important specifications at a glance

Descriptive technical specifications
Wear resistance at -100°C	- 🟧 🟧 🟧 🟧 🟧 +	More information on wear resistance
Wear resistance at +250°C	- 🟧 🟧 🟧 🟧 🟧 +
Wear resistance at + 315°C	- 🟧 🟧 🟧 ⬜️ ⬜️ +
Surface pressure	- 🟧 🟧 🟧 🟧 🟧 +	150MPa
Low coefficient of friction	- 🟧 🟧 🟧 ⬜️ ⬜️ +	Coefficients of friction µ, dry: 0.09 - 0.27
Wear	- 🟧 🟧 🟧 🟧 ⬜️ +	µm/km, 6.30
Suitable for extremely high speeds	- 🟧 🟧 🟧 🟧 ⬜️ +
Low moisture absorption	- 🟧 🟧 🟧 🟧 ⬜️ +	More information on moisture absorption
Excellent wear resistance under water	- 🟧 🟧 🟧 🟧 ⬜️ +	Coefficient of friction µ: 0.04
Very high media resistance	- 🟧 🟧 🟧 🟧 ⬜️ +	More information on media resistance
Electrically dissipative	- 🟧 🟧 🟧 🟧 ⬜️ +
Universal chemical resistance	- 🟧 🟧 🟧 🟧 ⬜️ +
Mould resistance	- 🟧 🟧 🟧 🟧 🟧 +	According to DIN EN ISO 846

Mechanical specifications

The compressive strength of iglidur X plain bearings decreases with increasing temperatures. Diagram 02 illustrates this relationship. At the long-term permissible application temperature of +250°C, the permissible surface pressure is approximately 30MPa. The maximum recommended surface pressure represents a mechanical material parameter. No conclusions can be drawn about the tribology. With a maximum recommended surface pressure of 35MPa, iglidur X plain bearings are not suitable for extreme loads. Diagram 03 shows the elastic deformation of iglidur X under radial loads.

Permissible surface speeds

iglidur® X is designed for higher speeds than other iglidur® bearings. This is made possible by its high temperature resistance and particularly high thermal conductivity. This is also evident from the pv values of max. 1.32MPa · m/s. At the same time, only minimal radial forces act on the bearing in this case. At the specified speeds, friction can lead to an increase up to the limit of the continuously permissible temperature.

Surface speed of various iglidur materials

Information on p x v value and lubrication

Maximum surface speed

m/s	Rotating	Oscillating	linear
permanent	1.5	1.1	5
Short-term	3.5	2.5	10

Friction and wear

Like the wear resistance, the coefficient of friction μ also changes with the load (diagram 04 and 05).

Coefficient of friction for iglidur® X against steel (Ra = 1μm, 50HRC):

iglidur® X	dry	Greases	Oil	Water
Coefficient of friction µ	0.09-0.27	0.09	0.04	0.04

Diagram 04: Coefficient of friction as a function of the surface speed, p = 0.75MPa

Diagram 05: Coefficient of friction as a function of the pressure, v = 0.01m/s

Shaft materials

Friction and wear are also highly dependent on the mating partner. Shafts that are too smooth increase the coefficient of friction of the bearing. Smoothed surfaces with an average surface finish Ra of 0.6 to 0.8μm are ideal.

Diagrams 06 and 07 show an extension of the results of tests with different shaft materials that were carried out with iglidur® X plain bearings. If the shaft material you intend to use is not included in the test results presented here, please contact us.

Further information on shaft materials

Installation tolerances

iglidur® X plain bearings are standard bearings for shafts with h-tolerance (recommended at least h9). The bearings are designed for the press-fit in a housing with h7 tolerance. After installation in a housing with nominal dimensions, the inner diameter of the bearing with F10 tolerance adjusts itself automatically. For certain dimensions, the tolerance deviates depending on the wall thickness (see product range).

Important tolerances according to ISO 3547-1 after the press-fit:

Diameter d1 [mm]	Shaft h9 [mm]	iglidur® X F10 [mm]	Housing H7 [mm]
up to 3	0 - 0.025	+0.006 +0.046	0 +0.010
> 3 up to 6	0 - 0.030	+0.010 +0.058	0 +0.012
> 6 up to 10	0 - 0.036	+0.013 +0.071	0 +0.015
> 10 up to 18	0 - 0.043	+0.016 +0.086	0 +0.018
> 18 up to 30	0 - 0.052	+0.020 +0.104	0 +0.021
> 30 up 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