iglide® T500 - Material data

Maximum surface speed

fpm	Rotating	Oscillating	Linear
Constant	295	216	984
Short-term	689	492	1968

Permitted surface speeds

iglide® T500 is designed for higher speeds than other iglide® bushings due to its high temperature resistance and good heat conductivity. This is already clear from the p x v values of maximum 37600 psi x fpm.

At the speeds mentioned in Table 6.2, only the minimum radial loads are allowed to act on the bushings. The specified values show the speed at which due to friction an increase in temperature up to the long-term permitted value can occur.

Figure 6.3: Maximum recommended surface pressure dependent on the temperature

Figure 6.4: Wear, rotation with p = 108 psi, v = 98 fpm, (Cf53 shaft)

Temperatures

The iglide® T500 takes the top position also with regard to temperature resistance. With a permitted long-term application temperature of 482° F, the iglide® T500 tolerates even 600° F on a short term.

Like in all thermoplastics, the compressive strength decreases in iglide® T500 as well with rising temperature. Remarkably, however, the wear also significantly drops at the same time within the observed temperature range of 73.4° F to 302° F.

In the most unfavorable cases, a relaxation of the bushings can already occur at temperatures of more than 338° F. This leads to the loosening of the bushing in the housing after the re-cooling. For this reason, the firm seating of the bushing in the housing should be checked in tests at temperatures above 338° F. Steps should be taken if necessary to mechanically secure the bushing. Please contact us if there is any query about the application of the bushing.

Temperature limits

iglide® T500	Application temperature
Lower	- 148 °F
Upper, long-term	+ 482 °F
Upper, short-term	+ 599 °F

Figure 6.5: Coefficients of friction dependent on the surface speed, p = 108 psi (0.75 Mpa) (Cf53 shaft)

Friction and wear

Like the wear resistance, the coefficient of friction alters with increasing load. The coefficient of friction increases with rising speed, whereas an increasing load acts inversely. The coefficient of friction drops (see Figures. 6.5 and 6.6) This illustrates the excellent suitability of iglide® T500 bushings with high loads.

Friction and wear also depend to a high degree on the reverse partner. Extremely smooth shafts enhance the coefficient of friction of the bushing. Ideal are smoothed surfaces with an average surface finish of Ra of 24 to 32 rms.

Coefficients of friction for iglide® T500 against steel
(Ra = 1 µm, 50 HRC)

iglide® T500	Dry	Fat	Oil	Water
Coefficients of friction µ	0.09 - 0.27	0.09	0.04	0.04

Important tolerances for iglide® T500 bushings according to ISO 3547-1 after the press-fit.

Diameter d1 [inches]	Shaft h9 [inches]	iglide® T500 F10 [inches]
Up to 0.019685	0 - 0.0009842	+0.0002362 + 0.0018110
> 0.1181 to 0.2362	0 - 0.0011811	+0.0003937 + 0.0022835
> 0.2362 to 0.3937	0 - 0.0014173	+0.0005118 + 0.0027953
> 0.3937 to 0.7087	0 - 0.0014173	+0.0006299 + 0.0033858
> 0.7087 to 1.1811	0 - 0.0020472	+0.0007874 + 0.0040945
> 1.1811 to 1.9685	0 - 0.0024409	+0.0009842 + 0.0049213
> 1.9685 to 3.1496	0 - 0.0029134	+0.0011811 + 0.0059055

Installation tolerances

iglide® T500 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 F10 tolerance.

Medium	Resistance
Alcohol	+
Hydrocarbons	+
Fats, oils, without additives	+
Fuels	+
Diluted acids	+
Strong acids	+
Diluted bases	+
Strong bases	+

+ resistant      0 conditionally resistant      - non-resistant

Figure 6.11: Influence of humidity absorption of iglide® T500 bushings

Electrical properties

Specific forward resistance	< 105 Ωcm
Surface resistance	< 103 Ω

Chemical resistance

iglide® T500 bushings have almost universal chemical resistance.

They are affected only by concentrated nitric acid and sulfuric acid with an acid content of above 65%. The chemicals list given at the end of this catalog gives detailed information over this.

The humidity absorption of iglide® T500 bushings is extremely low. In standard climatic conditions, it lies below 0.1 Wt-%. Thus the iglide® T500 bushings can be even mounted for underwater applications without any adaptation to the installation conditions. The maximum water absorption is 0.5 Wt-%.

Radioactive rays

iglide® T500 bushings are radiation resistant up to a radioactive intensity of 1 x 10⁵ Gy. iglide® T500 is the radiation-resistant material in the iglide® product range. iglide® T500 is extremely resistant to strong gamma rays and withstands a radiation dose of 1,000 Mrad without any perceptible loss of any of its properties. The material also overcomes an alpha or beta radiation of 10,000 Mrad virtually unscathed.

UV-resistant

The excellent material features of the iglide® T500 do not alter under UV radiation and other climatic influences.

Vacuum

The iglide® T500 bushings can also be used almost unrestrictedly in vacuum. An evaporation takes place only to a minor degree.

Electrical properties

Bushingss made of iglide® T500 are electrically conductive.