iglide® TX1 - Material data

Material table

General features	Unit	iglide® TX1	Test method
Density	g/cm³	2,1
Color		grey-green
Max. humidity absorption at 73°F/50% R. H.	%weight	0,2	DIN 53495
Max. water absorption	%weight	0,5
Coefficient of surface friction, dynamic, against steel	µ	0,09 - 0,37
pv value, max. (dry)	psi x fpm	26,000
Mechanical properties [bold text]
Bending E-module	psi	1,740,000	DIN 53457
Tensile strength at +68 °F	psi	7,977	DIN 53452
Compressive strength	psi	31,910
Maximum recommended surface pressure (68 °F)	psi	29,000
Store D-hardness		94	DIN 53505
Physical and thermal properties [bold text]
Max. long term application temperature	°F	+248
Max. short term application temperature	°F	+338
Minimum application temperature	°F	-76
Thermal / heat conductivity	[W/m x K]	0,24	ASTM C 177
Coefficient of thermal expansion (at 73 °F)	[K^-1 x 10^-5]	3	DIN 53752
Electrical properties [bold text]
Specific forward resistance	Ωcm	>10^11	DIN IEC 93
surface resistance	Ω	>10^13	DIN 53482

iglide® TX1 plain bearings stand for very high load capacity with high radial loads combined with good abrasion resistance. The special design on the one hand ensures high dimensional stability through the long fiber winding, and on the other hand a lubrication- and maintenance-free operation is possible thanks to solid lubricants. High resistance to dirt and media round off the property profile.

Mechanical properties
With increasing temperatures, the compressive strength of iglide® TX1 plain bearings decreases. Fig. 02 clarifies this connection. With the short-term permitted application temperature of +338 °F, the permitted surface pressure still amounts to 14,500 psi. Maximum recommended surface pressure represents a mechanical material parameter. Tribological conclusions cannot be drawn from it.

Figure 03 shows the elastic deformation of iglide® TX1 with radial loads.

Surface pressure, load

Permitted surface speeds

Typical applications for iglide® TX1 plain bearings are highly loaded swiveling motion with rather low speeds. Independently of that, relatively high speeds are still attainable. The speeds stated in Table 03 are limit values for the low bearing loads. They say nothing about the wear resistance in these parameters.

fpm	Rotary	Oscillating	Linear
Constant	78	39	197
Short-term	177	98	393
Table 03: Maximum surface speeds

surface speedp x v value, lubrication

Temperatures

iglide® TX1 is a very temperature-resistant material. The upper long-term application temperature of 248°F allows extensive use, e.g. in typical applications in the agricultural, commercial vehicle or construction vehicle sector. The press-in and push-out forces of iglide® TX1 plain bearings are at a very high level over the entire temperature range, which makes an additional axial securing usually unnecessary. Some decrease to a still very high level can be observed from +212°F, which is why an axial locking can be recommended in the individual case from this temperature level on. The additional friction heat in the bearing system should be considered in the temperature observations.

Temperature

Friction and wear

Please note that a gliding partner with a rough surface finish will increase the friction. Extremely smooth shafts can likewise increase the coefficient of friction. We recommend shaft surface finishes (Ra) of 0.4 to a maximum of 0.7 µm. The coefficient of friction of iglide® TX1 plain bearings also depends to a large extent on the speed and load. With increasing surface speed, the friction coefficient increases rapidly. However, with load the coefficient of friction decreases continuously.

iglide® TX1	Dry	Grease	Oil	Water
Coefficients of friction µ	0,09-0,37	0,09	0,04	0,04
Table 04: Coefficients of friction against steel (Ra = 1 µm, 50 HRC)

Coefficients of frictionWear resistance

Coefficients of friction dependent on the load of TX1

Shaft materials

Generally, we recommend the use of hardened shafts for use in high load applications. This is especially true when using iglide® TX1. But still acceptable wear rates are also achieved on soft shafts in the high load swivel below 14,500 psi. Comparison of the wear rate in rotation and swiveling in Fig. 07 shows that the strength of iglide® TX1 lies in the highly loaded swivel.

Shaft materials

Wear in oscillating and rotating applications of TX1

Shaft materials

Further properties

Chemical resistance
Radioactive rays The iglide® TX1 bearings are radiation resistant up to a radiation intensity of 2 • 10² Gy.

UV-resistant igubal® TX1 plain bearings are permanently resistant against UV rays.

VacuumThe low water elements degas in the vacuum. Applications under vacuum conditions are possible with restrictions.

Medium	Resistance
Alcohols	0
Hydrocarbons	+
Greases, oils without additives	+
Fuels	+
Diluted acids	+
Strong acids	-
Diluted bases	+
Strong bases	-
+ Resistant 0 Conditionally resistant - Not resistant
All specifications at room temperature [68 °F]
Table 02: Chemical resistance of iglide® TX1

Electrical properties iglide® TX1 bearings are electrically insulating.

Specific forward resistance	> 10^11 Ωcm (not bold)	DIN IEC 93 (not bold)
Surface resistance [bold text]	>10^13Ω	DIN 53482

Humidity absorption / moisture absorption

The moisture absorption of iglidur® TX1 plain bearings amounts to about 0.2% in standard climatic conditions. The saturation limit in water is 0,5%.

Installation tolerances

iglide® TX1 plain bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings 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 bearing automatically adjusts as stated in the standard case.

Diameter d1 [mm]	Shaft h9 [mm]	iglide® TX1 [mm]	Housing H7 [mm]
> 20 bis 40	0 - 0,052	+0,020 +0,154	0 +0,021
> 40 bis 70	0 - 0,062	+0,025 +0,175	0 +0,025
> 70 bis 80	0 - 0,074	+0,050 +0,200	0 +0,030
Table 05: Important tolerances for iglide® TX1 plain bearings according to ISO 3547-1 after being pressed in, without possible expansion of the housing bore

Tolerances