iglidur® X - Material data

Maximum surface speed

m/s	Rotating	oscillating	Linear
Constant	1,5	1,1	5
Short-term	3,5	2,5	10

Table 02: Maximum surface speeds

Permitted surface speeds

iglidur® X is designed for higher speeds than other iglidur® bearings. This is made possible by a high temperature resistance and very high thermal conductivity. This is already clear from the pv values of maximum 1.32 MPa · m/s. At the same time, only minimal radial forces act on the bearings in this case. At the specified speeds, an increase in temperature up to the long-term permitted value can occur due to friction.

Figure 04: Coefficients of friction dependent on the surface speed, p = 0.75 MPa
 
X = Sliding speed [m/s]
Y = Coefficient of friction μ

Figure 05: Coefficients of friction dependent on the load, v = 0.01 m/s
 
X = Load [MPa]
Y = Coefficient of friction μ

Friction and wear

Just like the wear resistance, the coefficient of friction µ also alters with the load (Fig. 04 and 05).

iglidur® X	Dry	Grease	Oil	Water
Coefficients of friction µ	0,09 - 0,27	0,09	0,04	0,04

Table 04: Coefficients of friction for iglidur® X against steel (Ra = 1 μm, 50 HRC)

Figure 06: Wear, rotating application with different shaft materials, p = 1 MPa, v = 0,3 m/s
 
Y = wear [μm/km]
 
A = Aluminum, hard-anodized
B = machining steel
C = Cf53
D = Cf53, hard chrome-plated
E = St37
F = V2A
G = X90

Diagram 07: Wear on rotating and oscillating applications with various shaft materials, p = 2 MPa

Y = wear [μm/km]

A = CF53
B = hard-chromed
C = 304 SS

blue= rotating
pink= oscillating

Diameter d1 [mm]	Shaft h9 [mm]	iglidur® X F10 [mm]	Housing H7 [mm]
Up to 3	0 - 0,025	+0,006 +0,046	0 +0,010
> 3 to 6	0 - 0,030	+0,010 +0,058	0 +0,012
> 6 to 10	0 - 0,036	+0,013 +0,071	0 +0,015
> 10 to 18	0 - 0,043	+0,016 +0,086	0 +0,018
> 18 to 30	0 - 0,052	+0,020 +0,104	0 +0,021
> 30 to 50	0 - 0,062	+0,025 +0,125	0 +0,025
> 50 to 80	0 - 0,074	+0,030 +0,150	0 +0,030

Table 07: Important tolerances iaw. ISO 3547-1 after press-fitting.

Installation tolerances

iglidur® X bearings are standard bearings for shafts with h-tolerance (recommended minimum s 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 to the F10 tolerance. In certain dimensions the tolerance in dependence on the wall thickness deviates from this (See delivery program )

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

+ resistant      0 partially resistant      - non-resistant
All specifications at room temperature [+20°C] Table 05: Chemical resistance of iglidur®

Electrical properties

Specific forward resistance	< 105 Ωcm
Surface resistance	< 103 Ω

Chemical resistance

iglidur® X bearings have almost universal chemical resistance. They are usually affected only by concentrated acids.

Radioactive rays

The iglidur® X bearings are radiation resistant up to a radiation intensity of 1 • 10⁵ Gy.

UV-resistant

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

Vacuum

The iglidur® X bearings can also be used almost unrestrictedly in vacuum. An evaporation takes place only to a minor degree.

Electrical properties

Bearings made of iglidur® X are electrically conductive.