iglidur® Q - material data

The most important specifications at a glance

iglidur Q plain bearings were developed especially for extreme loads. Under high loads, iglidur Q figures among the iglidur materials that by far display the best wear resistance. From a radial load of 25MPa, even plain bearings made from the abrasion-resistant iglidur W300 are exceeded. Specific solid lubricants, precisely integrated into the material, ensure that the maintenance-free dry operation is guaranteed under any load.

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, dry: 0.05 - 0.15
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?

For pivoting applications
For very good abrasion resistance, especially under extreme loads
For extreme pv values
When the bearing needs to be insensitive to dirt

When do I use a different material?

For use under water -> iglidur H370
When temperatures are continuously higher than +135°C -> iglidur H, iglidur X, iglidur Z
When high edge loads or heavy impact loads occur -> iglidur Q2

Download data sheet

Temperatures

Plain bearings made from iglidur Q retain their excellent wear resistance even at high temperatures. Additional protection is required at temperatures above +50°C. It should also be noted that the coefficient of friction increases sharply depending on the temperature from approx. +100°C.

Temperatures, coefficient of thermal expansion

min. application temperature	Upper application temperature, long-term	Upper application temperature, short-term	In addition secure axially from
-40°C	+135°C	+155°C	+50°C

Permissible surface speeds

Under extreme radial loads, iglidur Q plain bearing can reach the highest pv values possible in dry operation with iglidur plain bearings. Although iglidur Q plain bearings have the greatest advantages at high loads and low speeds, high surface speeds are also possible due to the excellent coefficient of friction of these bearings. The values given in the table show the speeds at which the temperature rises to the maximum permissible value as a result of friction.

Surface speeds of various iglidur materials

Maximum surface speed [m/s]	Rotating	Oscillating	linear
Long-term	1.0	0.7	5.0
Short-term	2.0	1.4	6.0

Permissible pv values

Pv value, max. (dry)

MPa · m/s

0.55

<a 0="[" 1="o" 2="b" 3="j" 4="e" 5="c" 6="t" 7=" " 8="O" 9="b" 10="j" 11="e" 12="c" 13="t" 14="]" href="/de-de/website/gleitlager/wiki/p-x-v-wert-und-schmierung" uuid="f16b1d8b-0ff1-4a28-951c-3fbeec74eafd" target="_self">Information on pv value and lubrication

Mechanical specifications

The maximum recommended surface pressure is a mechanical material parameter. No conclusions about the tribological properties can be drawn from this. The compressive strength of iglidur Q plain bearings decreases with increasing temperatures. Diagram 02 illustrates this inverse relationship. iglidur Q is a material that is used when high pv values are reached through high loads. Diagram 03 shows the elastic deformation of iglidur Q under radial loads. Under the maximum recommended surface pressure of 100MPa, the deformation at room temperature is less than 3%.

Friction and wear

Many plastic bearings feature decreasing coefficients of friction with increasing loads in dry operation. iglidur Q exceeds most iglidur plain bearings in this respect: Under high pressures the material offers excellent coefficients of friction (diagrams 04 and 05).

Coefficients of friction against steel (Ra = 1μm, 50HRC:

iglidur Q	dry	Greases	Oil	Water
Coefficient of friction μ	0.05 - 0.15	0.09	0.04	0.04

Shaft materials

Diagram 06 shows an extract of the results of tests with different shaft materials carried out with plain bearings made from iglidur Q. From 30MPa, the strengths of iglidur heavy-duty materials become apparent. iglidur Q stands out in particular here. Other heavy-duty materials such as iglidur Q2 and TX1 are only well ahead in terms of wear at even higher loads. What is striking about iglidur Q is its good wear on many different shaft materials.

Further information on shaft materials

Chemical resistance

iglidur Q plain bearings have very good resistance to chemicals. They have excellent resistance to organic solvents, fuels, oils and greases. The material is only partially resistant to weak acids and weak alkalis.

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

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

Moisture absorption

The moisture absorption of iglidur Q plain bearings is around 0.9% in standard climatic conditions. The saturation limit in water is 4.9%. This must be taken into account under appropriate operating conditions.

Maximum moisture absorption

at +23°C/50% room humidity.

0.9% weight

Maximum total moisture absorption

4.9% weight

Installation tolerances

iglidur Q 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 installation in a housing with nominal dimensions, the inner diameter of the bearings with E10 tolerance adjusts automatically. For certain dimensions, the tolerance deviates from this depending on the wall thickness (see product range).

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

Diameter d1 [mm]	Housing H7 [mm]	iglidur Q plain bearing E10 [mm]	Shaft h9 [mm]
up to 3	+0.000 +0.010	+0.014 +0.054	-0.025 +0.000
> 3 up to 6	+0.000 +0.012	+0.020 +0.068	-0.030 +0.000
> 6 up to 10	+0.000 +0.015	+0.025 +0.083	-0.036 +0.000
> 10 up to 18	+0.000 +0.018	+0.032 +0.102	-0.043 +0.000
> 18 up to 30	+0.000 +0.021	+0.040 +0.124	-0.052 +0.000
> 30 up to 50	+0.000 +0.025	+0.050 +0.150	-0.062 +0.000
>50 to 80	+0.000 +0.030	+0.060 +0.180	-0.074 +0.000
>80 to 120	+0.000 +0.035	+0.072 +0.212	-0.087 +0.000
>120 to 180	+0.000 +0.040	+0.085 +0.245	-0.100 +0.000