iglidur J - material data

What you will find on this page

iglidur J granulate material in a yellow pile.

▼ The most important specifications at a glance
▼ Material data sheet
▼ Mechanical specifications
▼ Permissible speed
▼ Friction and wear
▼ Shaft materials
▼ Installation tolerances
▼ Chemical resistance
▼ Typical application areas
▼ Request sample box
▼ Buy iglidur J products in the online shop

The most important specifications at a glance

Descriptive technical specifications
Wear resistance at +23°C	- 🟧 🟧 🟧 🟧 🟧 +	More information on wear resistance
Wear resistance at +90°C	- 🟧 🟧 🟧 🟧 🟧 +
Wear resistance at +150°C	- 🟧 ⬜️ ⬜️ ⬜️ ⬜️ +
Low coefficient of friction	- 🟧 🟧 🟧 🟧 🟧 +	Coefficient of friction µ, dry: 0.06 - 0.18
Low moisture absorption	- 🟧 🟧 🟧 🟧 ⬜️ +	More information on moisture absorption
Wear resistance under water	- 🟧 🟧 🟧 ⬜️ ⬜️ +	Coefficient of friction µ: 0.04
High media resistance	- 🟧 🟧 🟧 🟧 ⬜️ +	More information on media resistance
Resistant to edge pressures	- 🟧 🟧 🟧 🟧 ⬜️ +
Suitable for shock and impact loads	- 🟧 🟧 🟧 🟧 ⬜️ +
Resistant to dirt	- 🟧 🟧 🟧 🟧 ⬜️ +

Mechanical specifications

The compressive strength of iglidur J plain bearings decreases with increasing temperatures. Diagram 02 illustrates this relationship. At the long-term permissible application temperature of +90°C, the permissible surface pressure is approximately 20MPa. The maximum recommended surface pressure represents a mechanical material parameter. Conclusions about the tribology cannot be drawn from this. With a maximum recommended surface pressure of 35MPa, iglidur J plain bearings are not suitable for extreme loads. Diagram 03 shows the elastic deformation of iglidur J under radial loads.

Chart with a grid and a yellow line that slopes slightly downward from left to right.

Chart with two rising lines under load; the red line rises more steeply than the blue one.

Permissible sliding speeds

The low coefficient of friction and the very low stick-slip tendency of iglidur® J plain bearings are particularly important at very low speeds. However, iglidur® J can also be used for high speeds of over 1m/s. In both cases, the static friction is very low and there is almost no stick-slip. The maximum values given in table 02 can only be achieved at 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 due to the interaction of different influences.

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	8
Short-term	3	2.1	10

Friction and wear

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

iglidur J	dry	Greases	Oil	Water
Coefficient of friction µ	0.06-0.18	0.09	0.04	0.04

Friction speed chart with a slightly rising curve over the grid.

Chart with yellow curve: the coefficient of friction drops sharply at first, then stays low and nearly constant.

Shaft materials

Friction and wear are also highly dependent on the mating partner. The coefficient of friction of the pairing increases with increasing shaft roughness. A smoothed surface with an average surface finish Ra = 0.1 to 0.3μm is most suitable. Diagrams 06 and 07 show an extension of the results of tests with different shaft materials that were carried out with iglidur® J plain bearings. Compared to most other iglidur® materials, the wear of iglidur® J plain bearings is very low at low loads with all shaft materials tested. Even with increasing loads in the range up to 5MPa, the wear resistance of iglidur® J plain bearings is excellent. If your intended shaft material is not included in the test results presented here, please contact us.

Further information on shaft materials

Bar chart with categories A to G and bars of varying height.

Bar chart with values for A to D; D is the highest and B the lowest.

Installation tolerances

iglidur J 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 in a nominal size housing, the inner diameter automatically adjusts to the E10 tolerances. For particular dimensions the tolerance differs depending on the wall thickness (please see product range table).

Diameter d1 [mm]	Shaft h9 [mm]	iglidur® J E10 [mm]	Housing H7 [mm]
up to 3	0 - 0.025	+0.014 +0.054	0 +0.010
> 3 up to 6	0 - 0.030	+0.020 +0.068	0 +0.012
> 6 up to 10	0 - 0.036	+0.025 +0.083	0 +0.015
> 10 up to 18	0 - 0.043	+0.032 +0.102	0 +0.018
> 18 up to 30	0 - 0.052	+0.040 +0.124	0 +0.021
> 30 up 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 up to 180	0 - 0.100	+0.085 +0.245	0 +0.040

Chemical resistance

iglidur® J 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 use in wet or humid environments. Plain bearings made of iglidur® J are resistant to common cleaning agents in the food industry.