|General features||Unit||iglide® J200||Test method|
|Max. moisture absorption at 73° F/50% R. H.||Wt.-%||0.2||DIN 53495|
|Max. moisture absorption||Wt.-%||0.7|
|Coefficient of friction, dynamic against steel||µ||0.11 - 0.17|
|p x v value, max. (dry)||psi x fpm||8,600|
|Modulus of elasticity||psi||406,100||DIN 53457|
|Tensile strength 68° F||psi||8,412||DIN 53452|
|Permissible static surface pressure (68° F)||psi||3,336|
|Shore D hardness||70||DIN 53505|
Physical and thermal properties
|Upper long-term application temperature||°F||194|
|Upper short-term application temperature||°F||248|
|Lower application temperature||°F||-58|
|Thermal conductivity||[W/m x K]||0,24||ASTM C 177|
|Coefficient of thermal expansion (at 73° F)||[K-1 x 10-5 ]||8||DIN 53752|
|Specific volume resistance||Ωcm||> 10 8||DIN IEC 93|
|Surface resistance||Ω||> 10 8||DIN 53482|
For iglide® J200 plastic bushings running dry against a steel shaft, at 68° F
iglide® J200 is the result of the development of a particularly low-friction plastic bushings. The friction plays a crucial role particularly in linear applications. Whereas many materials have excellent coefficients of friction under high loads, iglide® J200 is characterized by its property to retain very good coefficients of friction in low loads as well.
Among all the iglide® materials, iglide® J200 exhibits the lowest coefficients of friction. The average coefficient of friction of all measurements, even with different shaft materials, is 0.11. For this reason the hard-anodized aluminum counter partner gains special significance.
The comparison with the rest of the iglide® materials makes it clear that iglide® J200 plastic bushings are suitable for rather low loads.
Figure 27.2 shows the expansion of the materials from room temperature up to the recommended maximum limit. Like all thermoplastics, the compression strength declines above the temperature. This is shown in Figure 27.3.
iglide® J200 attains high surface speeds through its excellent coefficients of friction. Continuous rotary speeds of 197 fpm are possible. The permitted speeds are clearly higher yet in linear movements or in short-term operation. Speeds of over 2953 fpm were successfully tested in linear movements.
The plastic bushings made of iglide® J200 were not developed for high temperatures. The maximum permitted temperature of 248° F should not be exceeded. Thereby the ambient temperature generated by friction has to be added. From 140° F onward, the bushings should be mechanically fastened, so that the danger of bushings creeping out of the bores is avoided. The wear resistance too declines disproportionately from 158° F.
|iglide® J200||Application temperature|
|Lower||- 58 °F|
|Upper, long-term||+ 194 °F|
|Upper, short-term||+ 248 °F|
|Additional axial securing||+ 140 °F|
Friction is the main argument for the application of plastic bushings made of iglide® J200. The friction of this bushing is more favorable with numerous shaft materials than that of any other iglide® plastic bushing.
The influence of the shaft is in contrast very large in wear resistance. It is worth taking a look, even at low loads, at the extensive measurement results of the conducted tests.
The graphs clarify this statement. The wear resistance of the bushing is exceptionally good up to the limit load of 3,336 psi, which makes the bushing better suited for rotating applications.
|Coefficients of friction µ||0.11 - 0.17||0.09||0.04||0.04|
The used shaft material has a large influence on the wear resistance. All shaft materials (soft or hardened) are indeed suitable for application with iglide® J200. However the best results are attained with hard-anodized aluminum. This counter partner has proved itself particularly in linear movements.
|Up to 0.019685||0 - 0.0009843||+0.0005512 + 0.0021259|
|> 0.1181 to 0.2362||0 - 0.0011811||+0.0007874 + 0.0026772|
|> 0.2362 to 0.3937||0 - 0.0014173||+0.0009843 + 0.0032677|
|> 0.3937 to 0.7087||0 - 0.0016929||+0.0012598 + 0.0040157|
|> 0.7087 to 1.1811||0 - 0.0020472||+0.0015748 + 0.0048819|
|> 1.1811 to 1.9685||0 - 0.0024409||+0.0019685 + 0.0059055|
|Greases, oils, without additives||+|
|Weak acids||0 to -|
|Strong alkaline||+ to 0|
|Specific volume resistance||> 108 Ωcm|
|Surface resistance||> 108 Ω|
iglide® J200 plastic bushings are resistant to diluted alkalis as well as to solvents and all kinds of lubricants. The humidity absorption of iglide® J200 plastic bushings amounts to about 0.2% in standard climatic conditions. The saturation limit in water is 0.7%. These values are so low that a moisture expansion need to be considered only in extreme cases.
iglide® J200 plastic bushings are radiation resistant up to a radioactive intensity of 3 x 10² Gy.
iglide® J200 plastic bushings are very resistant to the influence of UV rays.
The use in vacuum is possible only conditionally. Only dry plastic bushings made of iglide® J200 should be tested in vacuum.
Plastic bushings made of iglide® J200 are electrically insulating.
The iglide® J200 plastic bushings are manufactured according to order specifications.