iglidur® J2 material data - no longer available

Maximum surface speed

m/s

Rotating

Oscillating

Linear

permanent

0.8

0.7

3

Short-term

1.9

1.1

5

Table 02: Maximum surface speed

Permissible surface speeds
iglidur® J2 is mainly suitable for low sliding speeds in dry operation, but the specified values shown in table 02 can only be achieved at very low pressures. At the specified speeds, friction can cause a temperature increase up to the limit of the continuously permissible temperature. In practice, these limits cannot always be reached.

iglidur® J2

Application temperature

Minimum

-50°C

Maximum, long-term

+90°C

Maximum, short-term

+110°C

In addition secure axially from

+60°C

Table 03: Temperature limits for iglidur® J2

Temperature
The temperatures prevailing in the bearing system also influence the wear. With increasing temperatures, wear increases, and the effect is particularly noticeable from a temperature of +90°C. Additional securing is required at temperatures higher than +60°C.

iglidur® J2

dry

Greases

Oil

Water

Coefficient of friction µ

0.11 - 0.27

0.08

0.07

0.04

Table 04: Coefficients of friction for iglidur® J2 against steel (Ra = 1µm, 50HRC)

Friction and wear
Coefficient of friction and wear resistance are dependent on the application parameters (diagram 04 and 05).

Medium

Resistance

Alcohols

Hydrocarbons

Greases, oils without additives

Fuels

Diluted acids

0 to -

Strong acids

-

Diluted alkalines

Strong alkalines

+ up to 0

+ resistant      0 conditionally resistant      - non-resistant

All information at room temperature [+20 °C]
Table 05: Chemical resistance of iglidur® J2

Further specifications
Chemical resistance
iglidur® J2 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 permits the use in wet or humid environments. iglidur® J2 plain bearings are resistant to numerous common cleaning agents in the food industry.

Radioactive raysPlain bearings made of iglidur® J2 are radiation-resistant up to an intensity of 3 · 10²Gy.

UV resistanceiglidur® J2 plain bearings change colour under the influence of UV radiation. However, the hardness, compressive strength and wear resistance of the material do not change.

VacuumWhen used in a vacuum, any existing moisture evaporates. Therefore, only dry iglidur® J2 bearings are suitable for vacuum.

Electrical specificationsiglidur® J2 plain bearings are electrically insulating.

Specific transitional resistance

> 1013Ωcm

Surface resistance

> 1012 Ω

Maximum moisture absorption

at +23°C/50% r. humidity

0.2% weight

Max. moisture absorption

1.3% weight

Table 06: Moisture absorption of iglidur® J2

Moisture absorption
The moisture absorption of iglidur® J2 plain bearings in ambient conditions is approximately 0.2%. The saturation limit submerged in water is 1.3%. These values are so low that moisture expansion needs to be considered only in extreme cases.

Diameter
d1 [mm]

Shaft h9
[mm]

iglidur® J2
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

Table 07: Important tolerances for iglidur® J2 plain bearings according to ISO 3547-1 after press-fit.

Installation tolerances
iglidur® J2 plain bearings are standard bearings for shafts with h-tolerance (minimum h9 recommended). The bearings are designed for press-fit into an H7 toleranced housing. After being assembled into a housing of nominal size, the inner diameter of the bearing automatically adjusts to the E10 tolerance. In relation to the installation tolerance, the inner diameter changes with the absorption of humidity.