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iglide® A350 - Material data
General features of iglide® A350
Density
1.42 g/cm³
Colour
light blue
Max. moisture absorption at 73°F/50% R. H.
0.6 Wt.-% (DIN 53495)
Max. moisture absorption
1.9 Wt.-%
Coefficient of friction, dynamic, against steel
0.1 - 0.2 µ
P x v value, max. (dry)
11.500 psi x fpm
Mechanical features of iglide® A350
Modulus of elasticity (DIN 53457)
290.100 psi
Tensile strength at 68° F (DIN 53452)
15.950 psi
Compressive strength
11.310 psi
Permissible static surface pressure (68° F)
8.702 psi
Shore D hardness (DIN 53505)
76
Physical and thermal properties of iglide® A350
Upper long-term application temperature
+356 °F
Upper short-term application temperature
+410 °F
Lower application temperature
-148 °F
Thermal conductivity (ASTM C 177)
0.24 [W/m x K]
Coefficient of thermal expansion (at 73° F, DIN 53752)
8 [K-1 x 10-5]
Electrical properties of iglide® A350
Specific volume resistance (DIN IEC 93)
> 1011 Ωcm
Surface resistance (DIN 53482)
> 1011 Ω
Permissible p x v values for iglide® A350 plastic bushings running dry against a steel shaft, at 68°F
Permitted p x v values
FDA compliant and wear-resistant at high temperatures.
A very universal bushing for applications in the food and pharmaceutical industries. Thanks to the FDA conformity, iglide® A350 plastic bushings can be used wherever unpackaged foodstuffs are processed. With their tribological and thermal properties they are genuine all-rounders in the food industry.
Surface Pressure
The graph shows the elastic deformation of iglide® A350 during radial loading. At the recommended maximum surface pressure of 2900 psi the deformation is less than 5%.
Temperatures
Its temperature resistance makes iglide® A350 an ideal material for a bushings in the food industry. The typical temperatures here reach up to +266°F, which is ideally covered by iglide® A350. Application temperatures up to +410°F are permitted on the short term. Please note that at temperatures over +284°F, the pressfit forces of the bushings may decrease and an additional axial securing device is recommended.
The wear rate of the iglide® A350 plastic bushings increases only minimally with higher temperatures. Tests have shown good wear results at +212°F on all tested shaft materials
iglide A350® temperature thresholds
Minimum: -148°F
Upper, long-term: +356°F
Upper, short-term: +410°F
Additional axial securing: +284°F
Coefficients of friction as a function of the running speed; p = 145 psi
Friction and wear
The coefficients of friction of iglide® A350 on a steel shaft is in the mid range. The friction decreases at temperatures, which is quite unusual in dry operation. The graph shows the connection. The wear rates of all tests with iglide® A350 show good results at a low level. The most wear resistant ones are often found among the iglide® plastic bushings for food contact.
Coefficients of friction
Dry: 0.1 - 0.2 µ
Grease: 0 09 µ
Oil: 0.04 µ
Water: 0.04 µ
Coefficients of friction for iglide® A350 against steel (Shaft finish = 40 rms, 50 HRC)
Shaft Materials
The corrosion-resistant steels are rather considered natural for use in the food industry. The trials were therefore carried out especially on such materials. It has been shown that there is no clear favorite 440B and hard chrome-plated steel are both suitable. Hard anodized aluminum is also well suited for both linear and rotating movements.
Chemical Resistance
iglide® A350 plastic bushings are resistant to diluted acids and alkalis, alcohols and detergents. They are also resistant to most lubricants. The iglide® A350 plastic bushings are resistant to common cleaning agents used in the food industry. iglide® A350 is affected by esters, ketones, chlorinated hydrocarbons, aromatics and highly polar solvents.
+ resistant 0 partially resistant - non-resistant
All specifications at room temperature [+68°F]
Alcohols
+
Hydrocarbons, chlorinated
+ to 0
Greases, oils, without additives
+
Fuels
+
Weak acids
+
Strong acids
+
Weak alkaline
+
Strong alkaline
+
Radioactive rays
iglide® A350 plastic bushings are radiation resistant up to a radiation intensity of 2 x 102 Gy.
UV-resistant
iglide A350® plastic bushings are well resistant against UV rays.
Vacuum
In vacuum, iglide® A350 degases. The application in vacuum is possible only for dry bushings.
Electrical properties
iglide® A350 plastic bushings are electrically insulating.
Specific volume resistance
> 1011 Ωcm
Surface resitance
> 1011 Ω
Influence of moisture absorption of iglide® A350 plastic bushings
Moisture Absorption
The moisture absorption of iglide® A350 is low and can be disregarded when using standard bushings. Even at full saturation the iglide® A350 does not absorb more than 1.9% of water.
Maximum moisture absorption
by +23 °C/50 % r. F.: 0.6 weight-%
Max. water absorption: 1.9 weight-%
Installation tolerances
iglide® A350 plastic bushings are standard bushings for shafts with h-tolerance (recommended minimum h9). The bushings are designed for press-fit in a housing with h7 tolerance. After the installation in a housing with nominal diameter, the inner diameter of the bushing automatically adjusts to the F10 tolerance.
| Diameter d1 [mm] | Shaft h9 [mm] | iglide® A350 F10 [mm] | Housing H7 [mm] |
|---|---|---|---|
| Up to 3 | 0 - 0,025 | +0,006 +0,046 | 0 +0,010 |
| > 3 bis 6 | 0 - 0,030 | +0,010 +0,058 | 0 +0,012 |
| > 6 bis 10 | 0 - 0,036 | +0,013 +0,071 | 0 +0,015 |
| > 10 bis 18 | 0 - 0,043 | +0,016 +0,086 | 0 +0,018 |
| > 18 bis 30 | 0 - 0,052 | +0,020 +0,104 | 0 +0,021 |
| > 30 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 |
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