iglide® X6 - material data

Figure 01: Permissible p x v values for iglide® X6 bearings with a 1 mm wall thickness, in dry operation against a steel shaft at 68°F, installed in a steel housing.

Permissible surface speeds

Due to its high temperature resistance and good thermal conductivity, iglide® X6 plastic plain bearings are also suitable for high speed applications. At the speeds given, friction can cause a temperature increase to the maximum permissible levels. In practice, this temperature is rarely reached.

fpm	Rotary	Oscillating	Linear
Continuous	295	216	984
Short term	689	492	1969

Figure 02: Maximum recommended static surface pressure based on temperature (21,670 psi at +68°F)

Temperatures

The surrounding temperatures noticeably influence the wear performance of plastic plain bearings. The temperature resistance of iglide® X6 is among the highest in the iglide® range. In many tests it has shown a six times higher wear performance compared to the established high-temperature bearing iglide® T500. Another advantage to iglide® X6 is that axial fastening is only necessary at temperatures above 320°F.

iglide® X6	Application temperature
Minimum	–148°F
Max., long-term	+482 °F
Max., short-term	+599 °F
Add. securing is required from	+329 °F

Figure 03: Deformation under load and temperature

Compressive strength

With increasing temperatures, the compressive strength of iglide® X6 plain bearings decreases. The graph on the left shows the elastic deformation of iglide® X6 with radial loads. At the recommended maximum surface pressure of 290 psi, the deformation is less than 2%.

Figure 04: Coefficient of friction for iglide® X6 as a result of the running speed; p = 109 psi

Figure 05: Coefficient of friction as a function of the pressure, v = (0.01 m/s) fpm

Friction and wear

Similar to wear resistance, the coefficient of friction μ also changes with the load. The coefficient of friction of iglide® X6 declines with higher pressure and is practically constant for pressure above 4,350 psi. A higher speed also results in a lower coefficient of friction.

Figure 06: Coefficients of friction as a function of the shaft surface (cf53 hardened and ground steel)

Figure 07: Wear rotating with different shaft materials, p = 145 psi, v = 59 fpm

Shaft materials

The friction and wear are also dependent, to a large degree, on the shaft material. Shafts that are too smooth increase both the coefficient of friction and the wear of the plain bearing. The best shaft for iglide® X6 has a ground surface with an average roughness of Ra = 0.4 - 0.7 μm (figure 06).

Figures 06 and 07 show the results of testing different shaft materials with plain bearings made from iglide® X6.

In Graph 07, you can that iglide® X6 can be combined with various shaft materials.

Coefficients of friction for iglide® X6 against steel (Ra = 1 µm, 50 HRC):

iglide® X6	Dry	Grease	Oil	Water
Coefficients of friction μ	0.09–0.21	0.09	0.04	0.04

Chemical resistance of iglide® X6 at room temperature [+68 °F]

Medium	Resistance at 68°F
Alcohol	+
Hydrocarbons	+
Grease, oils without additives	+
Fuels	+
Diluted acids	+
Strong acids	+
Diluted alkalines	+
Strong alkalines	+

+ resistant      0 conditionally resistant      - not resistant

Electrical properties

Specific volume resistance	< 105 Ωcm
Surface resistance	< 105 Ω

Chemical resistance

iglide® X6 bearings have almost universal chemical resistance. They are only affected only by concentrated nitric acid and sulfuric acid. Due to its low moisture absorption, the material can be used in humid environments without problems. iglide® X6 is resistant to most typical detergents used in the food and packaging industries.

Radiation resistance

Plastic plain bearings made from iglide® X6 are resistant to radiation up to an intensity of 2 x 105 Gy.y of 2 x 10⁵ Gy

UV Resistance

Partially resistant against UV rays.

Vacuum

In a vacuum environment, iglide® X6 plain bearings can be used virtually without restrictions. Outgassing takes place to a very limited extent.

Figure 10: Effect of moisture absorption on iglide® X6 plastic plain bearings

Moisture absorption

The moisture absorption of iglide® X6 plastic plain bearings in relation to the size of the inner diameter (left).

Maximum moisture absorption
At +73°F/50% relative humidity	0.1 weight-%
Max. moisture absorption	0.5 weight-%

Installation tolerances

iglide® X6 plain bearings are oversized before being pressfit. After proper installation into a recommended housing bore, the inner diameter adjusts to meet our specified tolerances. Please adhere to the catalog specifications for housing bore and recommended shaft sizes. This will help to ensure optimal performance of iglide® plain bearings.