iglidur® P210 - Material data

Figure 02: Maximum recommended surface pressure dependent on the temperature (50 MPa to +20 °C)
 
X = Temperature [°C]
Y = Load [MPa]

Figure 03: Deformation under load and temperatures
 
X = Load [MPa]
Y = Deformatio [%]

Mechanical properties

Maximum recommended surface pressure represents a mechanical material parameter. Tribological conclusions cannot be drawn from it. With increasing temperatures, the compressive strength of iglidur® P210 plain bearings decreases. Fig. 02 clarifies this connection.

Fig. 03 shows the elastic deformation of iglidur® P210 during radial loading. Under the maximum recommended surface pressure of 50 MPa, the deformation at room temperature amounts to less than 3 %.

Maximum surface speed

m/s	Rotary	oscillating	Linear
Constant	1	0,7	3
Short-term	2	1,4	4

Table 02: Maximum surface speeds

Permitted surface speeds

Plain bearings made of iglidur® P210 are maintenance-free bearings developed for low to medium surface speeds. The maximum values stated in the Table 02 can be attained only with very low surface pressure. The specified maximum speed is the speed at which the long-term permitted temperature is reached by an increase in heat through friction.

iglidur® P	Application temperature
Lower	-40°C
Upper, long-term	+100°C
Upper, short-term	+160°C
Secure axially in addition	+50°C

Table 03: Temperature limits

Temperatures

With its extreme long-term application temperature of +100°C, iglidur® P210 is suitable for a wide range of applications. If still higher temperatures are required, the best-seller iglidur® G with 130°C upper long-term temperature is available. The temperatures prevailing in the bearing system also have an influence on the bearing wear. Rising temperatures mean higher wear. An additional securing is recommended at temperatures higher than +50°C.

Figure 04: Coefficients of friction dependent on the surface speed, p = 1 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® P	Dry	Grease	Oil	Water
Coefficients of friction µ	0,08 - 0,23	0,09	0,04	0,04

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

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

shaft materials

Figure 06 displays a summary of the results of tests with different shaft materials, which were conducted with iglidur® A210 plain bearings. In rotating movements below 1 MPa radial load, the wear of iglidur® P210 is generally very low. The wear is significantly higher only in combination with St37 shafts. In general, the wear during rotation is higher than for a swivel application with the same load. This reverses only from loads of 25 MPa (Fig. 07).

Fig. 07: Wear with oscillating and rotating applications with Cf53 as a function of the load
 
X = Load [MPa]
Y = Wear [μm/km]
 
A = Cf53, rotating
B = Cf53, pivoting

 

Medium	Resistance
Alcohols	+
Hydrocarbons	-
Greases, oils without additives	+
Fuels	+
Diluted acids	0
Strong acids	-
Diluted bases	-
Strong bases	-

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

Chemical resistance

iglidur® P210 bearings have a good resistance against chemicals. They are resistant to most lubricants. iglidur® P210 is not affected by most weak organic and inorganic acids.

Radioactive rays

Bearings made of iglidur® P210 are conditionally usable under radioactive radiation. They are resistant up to a radiation intensity of3 x 10² Gy.
 

UV-resistant

iglidur® P210 plain bearings have comparatively good UV resistance.
 

Vacuum

The existent humidity of iglidur® P210 bearings degasses in the vacuum. The use in vacuum is possible only limitedly.
 

Electrical properties

iglidur® P bearings are electrically insulating.

Specific forward resistance	> 1012 Ωcm
Surface resistance	> 1011 Ω

Maximum moisture absorption
by +23 °C/50 % r. F.	0,3 Wt.-%
Max. water absorption	0,5 Wt.-%

Table 06: Moisture absorption

Diagram 9: Effect of moisture absorption
 
X = Moisture absorption [weight %]
Y = Reduction of inside diameter [%]

Moisture absorption

The humidity absorption of iglidur® P210 bearings amounts to about 0.3 Wt.-% in standard climatic conditions. The saturation limit in water is 0,5 %. This minor humidity absorption is clearly below the values of iglidur® G.

Diameter d1 [mm]	Shaft h9 [mm]	iglidur® P210 E10 [mm]	Housing H7 [mm]
Up to 3	0 - 0,025	+0,014 +0,054	0 +0,010
> 3 to 6	0 - 0,030	+0,020 +0,068	0 +0,012
> 6 to 10	0 - 0,036	+0,025 +0,083	0 +0,015
> 10 to 18	0 - 0,043	+0,032 +0,102	0 +0,018
> 18 to 30	0 - 0,052	+0,040 +0,124	0 +0,021
> 30 to 50	0 - 0,062	+0,050 +0,150	0 +0,025
> 50 to 80	0 - 0,074	+0,060 +0,180	0 +0,030
> 80 to 120	0 - 0,087	+0,072 +0,212	0 +0,035
> 120 to 180	0 - 0,100	+0,085 +0,245	0 +0,040

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

Installation tolerances

iglidur® P210- 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 to the E10 tolerance. In certain dimensions the tolerance in dependence on the wall thickness deviates from this (See delivery program )