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iglide® J200 - Material data

Materials table

General features	Unit	iglide® J200	Test method
Density	g/cm³	1.72
Color		Dark gray
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
Mechanical properties
Modulus of elasticity	psi	406,100	DIN 53457
Tensile strength 68° F	psi	8,412	DIN 53452
Compressive Strength	psi	6,237
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
Electrical properties
Specific volume resistance	Ωcm	> 10 ⁸	DIN IEC 93
Surface resistance	Ω	> 10 ⁸	DIN 53482

Permissible p x v values for iglide® J200

Permitted p x v values

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.

Figure 27.2: Deformation under load and temperatures

Surface pressure

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.

Surface pressure, load

Maximum surface speed

fpm	Rotating	Oscillating	Linear
Constant	197	137	1969
Short-term	295	216	2953

Permitted surface speeds

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.

Surface speed

p x v value, lubrication

Figure 27.3: Maximum recommended surface pressure dependent on the temperature

Temperatures

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.

Temperature limits

iglide® J200	Application temperature
Lower	- 58 °F
Upper, long-term	+ 194 °F
Upper, short-term	+ 248 °F
Additional axial securing	+ 140 °F

Temperature

Figure 2.4: Coefficients of friction dependent on the surface speed, p =108 psi

Friction and wear

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 for iglide® J200 against steel
(Shaft finish = 40 rms, 50 HRC)

iglide® J200	Dry	Grease	Oil	Water
Coefficients of friction µ	0.11 - 0.17	0.09	0.04	0.04

Coefficients of friction

Wear resistance

Coefficients of friction dependent on the load, v = 1.96 fpm

Coefficients of friction dependent on the shaft surface (1050 hard chromed)

Fig. 2.7: Wear, rotating application with different shaft materials, load p = 108 psi, v = 98 fpm

Shaft Materials

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.

Shaft materials

Wear with various shaft materials in the rotating operation dependent on the load

Wear with different shaft materials, oscillating and rotating movement p = 290 psi

Important tolerances for iglide® J200 plastic bushings according to ISO 3547-1 after the press-fit.

Diameter d1 [inch]	Shaft h9 [inch]	iglide® J200 E10 [inch]
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

Installation tolerances

iglide® J200 plastic bushings are standard bushings for shafts with h-tolerance (recommended minimum h9).

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

Tolerances

Medium	Resistance
Alcohol	+
Hydrocarbons, chlorinated	+
Greases, oils, without additives	+
Fuels	+
Weak acids	0 to -
Strong acids	-
Weak alkaline	+
Strong alkaline	+ to 0

+ resistant 0 conditionally resistant - non-resistant

Influence of moisture absorption of iglide® J200 plastic bushings

Electrical properties

Specific volume resistance	> 10⁸ Ωcm
Surface resistance	> 10⁸ Ω

Chemical resistance

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.