iglidur® J3 - material data

The most important information at a glance

The new endurance runner: the specialist for pivoting and swelling loads.
iglidur J3 is directly comparable with our classic iglidur J in terms of general mechanical and thermal specifications

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?

If the wear resistance of iglidur J rotating or pivoting is to be further optimised
When very low coefficients of friction are required in dry operation
When high wear resistance at low load is required
When low moisture absorption is required
When good media resistance is required

When do I use a different material?

If you are looking for a wear-resistant plain bearing for linear strokes -> iglidur J
When temperatures continuously higher than +90°C occur -> iglidur J260
When radial surface pressures greater than 45MPa occur -> iglidur W300

Download data sheet

Temperature

The temperatures prevailing in the bearing system also have an influence on bearing wear. Wear increases with rising temperatures, and the effect is particularly noticeable from a temperature of +90°C upwards. Additional protection is required at temperatures higher than +60°C.

Temperatures, coefficient of thermal expansion

min. application temperature	Upper application temperature, long-term	Upper application temperature, short-term	In addition secure axially from
-50°C	+90°C	+120°C	+60°C

Permissible surface speed

iglidur J3 is also suitable for medium to high speeds, whereby the limit values specified in the table can only be achieved with very low pressure loads. At the specified speeds, friction can lead to an increase up to the limit of the permanently permissible temperature. In practice, these limit values cannot always be achieved.

Surface speeds of different iglidur materials

Maximum surface speed [m/s]	Rotating	Oscillating	linear
Long-term	1.5	1.1	8.0
Short-term	3.0	2.1	10.0

Permissible pv values

pv value, max. (dry)

MPa - m/s

0,50

Information on pv value and lubrication

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 J3 plain bearings decreases with increasing temperatures. Diagram 02 illustrates this relationship. Diagram 03 shows the elastic deformation of iglidur J3 under radial load. Under the maximum recommended surface pressure of 45MPa, the deformation is less than 6%. Possible plastic deformation depends, among other things, on the duration of the impact.

Friction and wear

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

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

iglidur J3	dry	Greases	Oil	Water
Coefficient of friction μ	0.06 - 0.20	0.09	0.04	0.04

Shaft materials

Friction and wear are also highly dependent on the shaft material. Shafts that are too smooth increase both the coefficient of friction and the wear of the bearing. A ground surface with an average surface finish Ra = 0.1 - 0.3 μm is best suited for iglidur J3. Diagram 06 shows that iglidur J3 can be combined with many different shaft materials. Diagram 07 compares rotating and pivoting operation. It can be seen that with increasing load, the wear increases more with rotating than with pivoting movements.

Further information on shaft materials

Chemical resistance

iglidur J3 plain bearings are resistant to diluted alkalis and very weak acids as well as fuels and all types of lubricants. The low moisture absorption also allows them to be used in wet or damp environments. Plain bearings from iglidur J3 are resistant to numerous cleaning agents used in the food industry.

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

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

Moisture absorption

The moisture absorption of iglidur J3 plain bearings is around 0.3% in a normal climate. The saturation limit in water is 1.3%. These values are so low that consideration of swelling due to moisture absorption is only necessary in extreme cases.

Maximum moisture absorption at +23°C/50% room humidity.
0.3% weight.

Maximum total moisture absorption
1.3% weight.

Installation tolerances

iglidur J3 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 automatically adjusts to the E10 tolerances. In relation to the installation tolerance, the inner diameter changes with the absorption of humidity.

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

Diameter d1 [mm]	Housing H7 [mm]	iglidur J3 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 up to 180	+0.000 +0.040	+0.085 +0.245	-0.100 +0.000