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iglidur® A500 - material data

Table of contents

    The most important specifications at a glance

    Plain bearings made from iglidur A500 can be used at high temperatures and are approved for direct contact with food (FDA-compliant). They have exceptionally good chemical resistance and are therefore suitable for the most difficult applications in the food industry. Although iglidur A500 is a tough material, it also has excellent compressive strength, even at high temperatures.

    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 0.26 - 0.41
    Wear resistance under water- 🟧 🟧 🟧 🟧 ⬜️ +
    Media resistance- 🟧 🟧 🟧 🟧 🟧 +More information on media resistance
    Resistant to edge pressures- 🟧 🟧 🟧 🟧 ⬜️ +
    Impact and edge pressure- 🟧 🟧 🟧 🟧 ⬜️ +
    Dirt resistance- 🟧 🟧 🟧 ⬜️ ⬜️ +

    When do I use this material?

    • When FDA conformity is required
    • When very high chemical resistance is required
    • Good abrasion resistance
    • Temperature resistant from -100°C to +250°C

    When do I use a different material

    Material data table

    General properties Unitiglidur A500 Testing method
    Density g/cm³ 1.28
    Colour brown
    Max. moisture absorption at +23°C/50% room humidity % weight 0.3 DIN 53495
    Max. moisture absorption % weight 0.5
    Coefficient of geothermal friction, dynamic, against steel µ 0.26-0.41
    pv value, max. (dry) Mpa xm/s 0.28
    Mechanical properties
    Flexural modulus MPa 3,600 DIN 53457
    Flexural strength at 20°C MPa 140DIN 53452
    Compressive strength MPa 118
    Maximum recommended surface pressure (20°C) MPa 120
    Shore D hardness MPa 83DIN 53505
    Physical and thermal properties
    Max. long-term application temperature °C +250
    Max. short-term application temperature °C +300
    min. application temperature °C -100
    Thermal conductivity W/m x K 0.24 ASTM C 177
    Coefficient of thermal expansion (at 23°C) K-1 x 10-5 9 DIN 53752
    Electrical properties
    Specific transitional resistance Ωcm > 1014DIN IEC 93
    Surface resistanceΩ> 1013DIN 53482

    Temperatures

    In the short-term, iglidur A500 plain bearings can be used at temperatures of up to +300°C. The compressive strength of iglidur A500 plain bearings decreases with increasing temperatures. The temperatures prevailing in the bearing system also have an influence on bearing wear. At temperatures above +130°C, additional safety device is required.

    Temperatures, coefficient of thermal expansion

    iglidur A500Application temperature
    Minimum-100°C
    Max. long-term +250°C
    Maximum, short-term + 300°C
    In addition secure axially from +130°C

    Permissible surface speeds

    iglidur A500 also allows high surface speeds due to its high temperature resistance. However, the coefficient of friction increases due to this high speed, which leads to higher heating of the bearing. Tests show that plain bearings made of iglidur A500 are more resistant to wear during pivoting movements, and the permissible pv value is also higher in pivoting operation.

    Surface speeds of different iglidur materials

    Maximum surface speed [m/s]RotatingOscillating linear
    permanent0.6 0.4 1.0
    Short-term1.00.7 2.0

    Permissible pv values

    Diagram 01: Permissible pv values for iglidur® A500 with a wall thickness of 1mm dry operation against a steel shaft at +20°C, mounted in a steel housing
    Diagram 01: Permissible pv values for iglidur® A500 with a wall thickness of 1mm dry operation against a steel shaft at +20°C, mounted in a steel housing

    Diagram 01: Permitted pv values for iglidur A500 plain bearings with 1mm wall thickness in dry operation against a steel shaft, at +20°C, installed in a steel housing

    X = surface speed [m/s]
    Y = pressure [MPa]

    pv value, max. (dry)

    MPa - m/s

    0,28

    Information on pv value and lubrication

    Mechanical specifications

    The compressive strength of iglidur A500 plain bearings decreases with increasing temperatures. Diagram 02 illustrates this relationship. The maximum recommended surface pressure represents a mechanical material parameter. Conclusions about the tribology cannot be drawn from this. Diagram 02 shows the maximum recommended surface pressure of the bearing as a function of temperature. The combination of high strength on the one hand and high flexibility on the other has a very positive effect on vibrations and edge loads. As the wear of the plain bearing increases rapidly from pressures of 10 to 20MPa, we recommend that the use above these limits is checked very carefully.

    Diagram 02: Maximum recommended surface pressure as a function of temperature (120MPa at +20°C)

    X = temperature [°C]
    Y = pressure [MPa]

    Diagram 03: Deformation under load and temperatures

    X = load [MPa]
    Y = deformation [%]

    Friction and wear

    The coefficient of friction depends on the load acting on the bearing (diagrams 04 and 05).

    Coefficients of friction for iglidur A500 against steel (Ra = 1μm, 50 HRC):

    iglidur A500 dryGreases Oil Water
    Coefficient of friction µ 0.26 - 0.41 0.09 0.04 0.04

    Diagram 04: Coefficient of friction as a function of the surface speed, p = 0.75MPa

    X = surface speed [m/s]
    Y = coefficient of friction μ

    Diagram 05: Coefficients of friction as a function of the load, v = 0.01m/s

    X = load [MPa]
    Y = coefficient of friction μ

    Shaft materials

    Diagram 06 shows an extension of the results of tests with different shaft materials that were carried out with plain bearings made from iglidur A500. The combination "iglidur A500 against hard chrome-plated shaft" clearly stands out during rotation. The wear of this combination remains largely load-independent up to approx. 2.0MPa. When swivelling against shafts made of Cf53, the wear resistance is better than when rotating under the same load. If the shaft material you require is not included in this diagram, please contact us.

    Further information on shaft materials

    Diagram 06: Wear, rotating application with different shaft materials, p = 1MPa, v = 0.3m/s

    X = shaft material
    Y = wear [μm/km]

    A = aluminium, hard-anodised
    B = free cutting steel
    C = Cf53
    D = Cf53, hard-chromed
    E = HR carbon steel
    F = 304 SS
    G = high grade steel

    Diagram 07: Wear in oscillating and rotating applications with Cf53 as a function of pressure

    X = pressure [MPa]
    Y = wear [μm/km]

    A = rotating
    B = oscillating

    Chemical resistance

    iglidur A500 plain bearings have excellent resistance to cleaning agents, greases, oils, alkalis and acids.

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

    Medium Resistance
    Alcohols+
    Hydrocarbons+
    Greases, oils without additives +
    Fuels+
    Diluted acids +
    Strong acids +
    Diluted alkalines +
    Strong alkalines +

    Moisture absorption

    Diagram 10: Influence of moisture absorption

    X = moisture absorption [Gew.-%]
    Y = reduction of inner ø [%]

    The moisture absorption of iglidur A500 plain bearings is only 0.5% when saturated in water.

    Maximum moisture absorption
    at +23°C/50% r. humidity 0.3% weight
    Max. moisture absorption 0.5% weight

    Electrical properties

    iglidur A500 plain bearings are electrically insulating.

    Electrical properties
    Specific transitional resistance > 1014 Ωcm
    Surface resistance> 1013 Ω

    Installation tolerances

    iglidur A500 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, in standard cases the inner diameter automatically adjusts to the F10 tolerances.

    Diameter d1 [mm]Shaft h9 [mm]iglidur A500 plain bearing F10 [mm]Housing H7 [mm]
    up to 3 0 - 0.025 +0.006 +0.046 0 +0.010
    > 3 up to 6 0 - 0.030 +0.010 +0.058 0 +0.012
    > 6 up to 10 0 - 0.036 +0.013 +0.071 0 +0.015
    > 10 up to 18 0 - 0.043 +0.016 +0.086 0 +0.018
    > 18 up to 30 0 - 0.052 +0.020 +0.104 0 +0.021
    > 30 up to 50 0 - 0.062 +0.025 +0.125 0 +0.025
    >50 to 80 0 - 0.074 +0.030 +0.150 0 +0.030
    >80 to 1200 - 0.087 +0.036 +0.176 0 +0.035
    > 120 up to 180+0.100 + 0+0.043 +0.203 0 +0.040

    Thermal conductivity

    [W/m · K] 0.24

    ASTM C 177

    Coefficient of thermal expansion

    (at +23°C) [K-1 · 10-5] 9

    DIN 53752

    Compressive strength

    118MPa

    Vacuum

    Any moisture present in a vacuum will outgas. Use in a vacuum is only possible to a limited extent.

    Radioactive radiation

    Plain bearings made of iglidur A500 are resistant to radiation up to a radiation intensity of 2 · 105 Gy.

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    Typical application areas

    Food industry

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    Beverage technology

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    Medical technology

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