iglidur® G - Material data

The most important specifications at a glance

Excellent coefficient of friction
Resistant to edge pressure
Resistant to shocks and impacts
Particularly resistant to dirt and dust
Resistant to high loads (>60N/mm²)
Mould resistant according to DIN EN ISO 846
Fogging behaviour according to DIN 75201-B
CO2 equivalent: available per piece

When do I use this material?

When an economical all-round performance bearing is required
For low to average surface speeds
When the bearing needs to run on different shaft materials
For pivoting and rotational movements

When do I use a different material?

When mechanical rework is required iglidur®
M250, sleeve bearing
When the highest wear resistance is required
iglidur® W300, sleeve bearing
When universal chemical resistance is required
iglidur® X, sleeve bearing
When temperatures are constantly higher than +130°C
iglidur® H, sleeve bearing
iglidur® X, sleeve bearing
iglidur® H370, sleeve bearing
When used under water
iglidur® H370, sleeve bearing

Maximum surface speed

m/s	Rotary	oscillating	Linear
Constant	1	0,7	4
Short-term	2	1,4	5

Table 02: Maximum surface speeds

Permitted surface speeds

iglidur® G has been developed for low to medium surface speeds. The maximum values stated in the Table 02 can be attained only with minor pressure loads. At the specified speeds, an increase in temperature up to the long-term permitted value can occur due to friction. In practice these limit values are not always reached due to interactions.

Surface speed

p x v value and lubrication

iglidur® G	Dry	Greases	Oil	Water
Coefficients of friction µ	0.08 - 0.15	0.09	0.04	0.04

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

Friction and wear

Similar to wear resistance, the coefficient of friction µ also changes with the surface speed and load (Diagram 04 and 05).

Coefficients of friction

Wear resistance

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

X = surface speed [m/s]
Y = coefficient of friction μ

Diagram 05: Coefficients of friction as a function of load, v = 0.01m/s

X = load [MPa]
Y = coefficient of friction μ

Shaft materials

The friction and wear are also dependent, to a large degree, on the counter partner. Shafts that are too smooth increase both the coefficient of friction and the wear of the bearing. For iglidur® G a ground surface with an average surface finish Ra = 0.8µm is recommended. Diagram 06 shows an excerpt of the results of tests with various shaft materials that were carried out with iglidur® G plain bearings. It is important to notice that with increasing loads, the recommended hardness of the shaft increases. The "soft" shafts tend to wear themselves and thus increase the wear of the overall system. If the loads exceed 2MPa it is important to recognise that the wear rate (the gradient of the curves) clearly decreases with the hard shaft materials. If the shaft material you intend to use is not included in the test results presented here, please contact us.
Shaft materials

Wear, rotating applications with different

Diagram 06: Wear, rotating application with different shaft materials, load p=0.75MPa, v = 0.5m/s

X = shaft material
Y = wear [μm/km]

A = aluminium, hard anodised.
B = free cutting steel
C = CF53
D=Cf53, hard-chromed
E = HR carbon steel
F = 304 SS
G = high grade steel

Wear in oscillating and rotating applications

Diagram 07: Wear on oscillating and rotating applications with shaft material Cf53 dependent on the load

X = load [MPa]
Y = wear [μm/km]

A = rotating
B = oscillating

Diameter d1 [mm]	Shaft h9 [mm]	iglidur® G E10 [mm]	Housing H7 [mm]
up 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-fit

Installation tolerances

iglidur® G plain bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed for press-fit into a housing machined to a H7 tolerance.After being assembled into a nominal size housing, the inner diameter of the bearing automatically adjusts to the E10 tolerances. For certain dimensions the tolerance differs depending on the wall thickness (see product range)

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

+ Resistant 0 limited resistance - not resistant
All specifications at room temperature[+20 °C]
Table 05: Chemical resistance of iglidur®

Electrical properties

Specific forward resistance	> 10¹³ Ωcm
Surface resistance	> 10¹¹ Ω

Further properties

Chemical resistanceiglidur® G bearings have a good resistance against chemicals at room temperature. They are resistant to most lubricants. iglidur® G is not affected by most weak organic and inorganic acids.

Radioactive raysiglidur® G bearings are radiation resistant up to a radioactive intensity of 3 • 10² Gy.

UV-resistantiglidur® G bearings are permanently resistant against UV rays.

VacuumIn vacuum, iglidur® G degases. The application in vacuum is possible only for dry bearings.

Electrical propertiesiglidur® G bearings are electrically insulating.