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iglide® B - Material data

Materials table

General features Unit iglide® B Test method
Density g/cm³ 1,15
Color Gray
Max. humidity absorption at 23° C/50% R. H. Wt.-% 1,0 DIN 53495
Max. water absorption Wt.-% 6,3

Mechanical properties
Bending E-module MPa 1.750 DIN 53457
Bending strength at 20° C MPa 55 DIN 53452
Maximum recommended surface pressure (20° C) MPa 40
Shore D hardness 69 DIN 53505

Physical and thermal properties
Upper long-term application temperature °C 100
Upper short-term application temperature °C 130
Upper short-term ambient temperature1) °C 150
Lower application temperature °C -40

Electrical properties
Specific forward resistance Ωcm > 1010 DIN IEC 93
Surface resistance Ω > 10 9 DIN 53482
1) Without additional load; no gliding movement; relaxation not excluded.


Permitted p x v values

For iglide® B bearings with 1 mm wall thickness in dry operation against a steel shaft, at 20° C, installed in a steel housing.

Vibration dampening and the separation of impact sound were the focus in the development of iglide® B.


Figure 22.2: Deformation under load and temperatures

Surface pressure

The compressive strength of the iglide® B bearings is on the one hand low, but on the other, is an important property of the bearing. They are mainly used where vibration dampening and acoustic separation are required.


Maximum surface speed

m/s Rotating Oscillating Linear
Constant 0,7 0,5 2
Short-term 1 0,7 3

Permitted surface speeds

iglide® B bearings can be continuously used up to 0.7 m/s. The frictional heat provides the speed limits.


Figure 22.3: Maximum recommended surface pressure dependent on the temperature

Temperatures

The operating temperature of the iglide® B bearings is limited to 100° C. From 50° C onward, the very soft bearing should be mechanically fastened, so that the danger of bushings creeping out of the bores is avoided. The wear resistance too declines disproportionately from 70° C.

Temperature limits

iglide® B Application temperature
Lower - 40 °C
Upper, long-term + 100 °C
Upper, short-term + 130 °C


Figure 2.4: Coefficients of friction dependent on the surface speed, p = 0.75 MPa

Friction and wear

The iglide® B bearings assume a center position in wear resistance. As far as the bearing load is not too high, the attained coefficients of wear are pretty good. An increase in load results in a disproportionate increase in abrasion.

Coefficients of friction for iglide® B against steel
(Ra = 1 µm, 50 HRC)

iglide® B Dry Fat Oil Water
Coefficients of friction µ 0,1 - 0,35 0,09 0,04 0,04

Figure 2.5: Coefficients of friction dependent on the load, v = 0.01 m/s
Figure 22.6: Coefficients of friction dependent on the shaft surface (Cf53 shaft)

Fig. 2.7: Wear, rotating application with different shaft materials, load p = 0.75 MPa, v = 0.5 m/s

Shaft materials

The influence of the shaft is not very large in wear resistance.

Figures 22.7 and 22.8 clarify that very similar wear data are attained with different shaft materials. If high operational performances are expected, the bearing load should not be too high.

Figure 22.8: Wear with various shaft materials in the rotating operation dependent on the load
Figure 22.9: Wear with pivoting and rotating applications with Cf53 shaft material, dependent on the load

Important tolerances for iglide® B bearings according to ISO 3547-1 after the press-fit.

Diameter
d1 [mm]
Shaft h9
[mm]
iglide® B
D11 [mm]
Up to 0.5 0 - 0,025 +0,020 + 0,080
> 3 to 6 0 - 0,030 +0,030 + 0,105
> 6 to 10 0 - 0,036 +0,040 + 0,130
> 10 to 18 0 - 0,043 +0,050 + 0,160
> 18 to 30 0 - 0,052 +0,065 + 0,195
> 30 to 50 0 - 0,062 +0,080 + 0,240

Installation tolerances

iglide® B bearings are standard bearings for shafts with h-tolerance (recommended minimum h9).

After the installation in a housing bore with H7 tolerance, the inner diameter of the bearing automatically adjusts to the E10 tolerance.


Medium Resistance
Alcohol + to 0
Hydrocarbons -
Fats, oils, without additives -
Fuels -
Diluted acids 0 to -
Strong acids -
Diluted bases -
Strong bases -
+ resistant      0 conditionally resistant      - non-resistant

Figure 22.10: Influence of humidity absorption of iglide® B bearings


Electrical properties

Specific forward resistance > 1010 Ωcm
Surface resistance > 109 Ω

Chemical resistance

iglide® B bearings are not very resistant to chemicals For chemical resistance, there are other iglide® materials available with better properties.

Radioactive rays

iglide® B bearings are radiation resistant up to a radioactive intensity of 3 x 10² Gy.

UV-resistant

iglide® B bearings are not resistant to the influence of UV rays.

Vacuum

The use in vacuum is possible only conditionally. Only dry bearings made of iglide® B should be tested in vacuum.

Electrical properties

Bearings made of iglide® B are electrically insulating.

Delivery program

The iglide® B bearings are manufactured according to order specifications.