iglidur® H1 - material data

The most important specifications at a glance

iglidur H1 plain bearings have been specially developed for use under extreme environmental conditions. Their strengths are their extremely high wear resistance and excellent coefficient of friction, even in applications in which the bearings are exposed to high temperatures or aggressive media. iglidur H1 plain bearings can be used completely lubrication-free; when used in wet areas, the surrounding medium can act as an additional lubricant.

Descriptive technical specifications
Wear resistance at +23°C	- 🟧 🟧 🟧 🟧 🟧 +	More information on wear resistance
Wear resistance at +90°C	- 🟧 🟧 🟧 🟧 🟧 +
Wear resistance at +150°C	- 🟧 🟧 🟧 🟧 🟧 +
Slide property	- 🟧 🟧 🟧 🟧 ⬜️ +	Coefficient of friction, dynamic, against steel: µ 0.06 - 0.20
Wear resistance under water	- 🟧 🟧 🟧 🟧 ⬜️ +
Media resistance	- 🟧 🟧 🟧 🟧 🟧 +	More information on media resistance
Resistant to edge pressures	- 🟧 🟧 ⬜️ ⬜️ ⬜️ +
Resistant to shock and impact loads	- 🟧 🟧 ⬜️ ⬜️ ⬜️ +
Dirt resistance	- 🟧 🟧 ⬜️ ⬜️ ⬜️ +

When do I use this material?

When maximum service life is required under the influence of temperature and humidity
When low coefficient of friction and high temperature resistance are required
When aggressive cleaning is required on a regular basis (flushing, steam jet)
If the bearings are used in the engine compartment

When do I use a different material?

When high surface pressures occur -> iglidur Z
When only the best universal chemical resistance is required -> iglidur X
If you are looking for a cost-effective high-temperature plain bearing that does not require the best wear resistance -> iglidur H2
When an FDA-compliant plain bearing with high temperature resistance is required -> iglidur A500

Material data table

General properties	Unit	iglidur® H1	Testing method
Density	g/cm³	1.53
Colour		cream
Max. moisture absorption at +23°C/50% room humidity	% weight	0.1	DIN 53495
Max. moisture absorption	% weight	0.3
Coefficient of sliding friction, dynamic against steel	µ	0.06 - 0.20
pv value, max. (dry)	MPa x m/s	0.8
Mechanical properties
Flexural modulus	MPa	2800	DIN 53457
Flexural strength at 20°C	MPa	55	DIN 53452
Compressive strength	MPa	78
Maximum recommended surface pressure (20°C)	MPa	80
Shore D hardness		77	DIN 53505
[b]Physical and thermal properties [/b]
Max. long-term application temperature	°C	+200
Max. short-term application temperature	°C	+240
min. 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	6	DIN 53752
Electrical properties
Specific transitional resistance	Ωcm	> 10¹²	DIN IEC 93
Surface resistance	Ω	> 10¹¹	DIN 53482

Download data sheet

Temperatures

iglidur H1 is a very temperature-resistant material. The temperatures prevailing in the bearing system also have an influence on the bearing wear. The wear increases with rising temperatures. With iglidur H1 in particular, however, this increase is very low. Additional protection is required at temperatures higher than +80°C.

iglidur H1	Application temperature
Minimum	-40°C
Max. long-term	+200°C
Maximum, short-term	+240°C
In addition secure axially from	+80°C

Temperatures, coefficient of thermal expansion

Permissible surface speeds

Due to the excellent coefficient of friction, surface speeds of up to 2m/s are possible with iglidur H1 plain bearing in dry operation. Linear speeds of up to 5m/s can be realised. The speeds given in the table are limit values for the lowest bearing loads. With higher loads, the permissible speed decreases with the load due to the limitations of the pv value.

Maximum surface speeds

m/s	Rotating	Oscillating	linear
permanent	2.0	1.0	5.0
Short-term	2.5	1.5	7.0

Surface speeds of various iglidur materials

Permissible pv values

pv value, max. (dry)

MPa · m/s

0.80

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Mechanical specifications

The maximum recommended surface pressure is a mechanical material parameter. Conclusions about the tribology cannot be drawn from this. The compressive strength of iglidur H1 plain bearings decreases with increasing temperatures. Diagram 02 illustrates this relationship. Diagram 03 shows the elastic deformation of iglidur H1 under radial load. Among the iglidur H materials, iglidur H1 is the material with the greatest flexibility. This must be taken into account for applications with high surface pressures or edge loads.

Friction and wear

Like the wear resistance, the coefficient of friction changes with increasing load and surface speed (diagrams 04 and 05).

Coefficients of friction for iglidur H1 against steel (Ra = 1µm, 50 HRC):

iglidur H1	dry	Greases	Oil	Water
Coefficient of friction µ	0.06 - 0.2	0.09	0.04	0.04

Shaft materials

Diagrams 06 and 07 show an excerpt of the results of tests with different shaft materials that were carried out with plain bearings made from iglidur H1 in the igus laboratory. Plain bearings made from iglidur H1 show excellent wear behaviour in combination with a wide variety of shaft materials in both rotating and pivoting operation. On 304 stainless steel shafts in particular, iglidur H1 achieves very low wear rates in both rotating and pivoting operation. Even on hard-anodised aluminium shafts, iglidur H1 plain bearings have a long service life in rotating applications with low to medium loads.

Further information on shaft materials

Chemical resistance

iglidur H1 plain bearings have good resistance to chemicals. Therefore, even chemicals can act as lubricants. iglidur H1 plain bearings are non-resistant to hot, oxidising acids and some other particularly aggressive chemicals.

+ resistant 0 conditionally resistant - non-resistant
All data at room temperature [20 °C]

Medium	Resistance
Alcohols	+
Hydrocarbons	+
Greases, oils without additives	+
Fuels	+
Diluted acids	+ up to 0
Strong acids	+ to -
Diluted alkalines	+
Strong alkalines	+ to -

Moisture absorption

The moisture absorption of iglidur H1 plain bearings in a normal climate is approx. 0.1% weight. The saturation limit in water is 0.3% weight. Therefore, iglidur H1 is very well suited for use in wet environments.

Maximum moisture absorption
at +23°C/50% r. humidity	0.1 weight %
Max. moisture absorption	0.3% weight

Electrical properties

iglidur H1 plain bearings are electrically insulating.

Electrical properties
Specific transitional resistance	> 10¹² Ωcm
Surface resistance	> 10¹¹ Ω

Installation tolerances

iglidur H1 plain bearings are press-fit bushings for shafts with h-tolerance (recommended minimum h9).
The bearings are designed for press-fit into a housing machined to a 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).

Diameter d1 [mm]	Shaft h9 [mm]	iglidur H1 plain bearing 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
>80 to 120	0 - 0.087	+0.036 +0.176	0 +0.035
> 120 up to 180	+0.100 + 0	+0.043 +0.203	0 +0.040

Radioactive rays

Resistant up to a radiation intensity of 2 x 102Gy.

UV resistance

iglidur H1 plain bearings are only partially resistant to UV radiation. Under the influence of weathering, the surface of iglidur H1 becomes rougher and wear increases. Therefore, the use of iglidur H1 plain bearings that are directly exposed to the weather must be checked on a case-by-case basis.