iglidur® V400 - material data

The most important specifications at a glance

iglidur V400 plain bearings are not suitable for high pressures or static high loads. However they are characterised by a high wear resistance all the way up to the maximum recommended surface pressure.

Descriptive technical specifications
Wear resistance at +23°C	- 🟧 🟧 🟧 ⬜️ ⬜️ +	More information on wear resistance
Wear resistance at +90°C	- 🟧 🟧 🟧 🟧 ⬜️ +
Wear resistance at +150°C	- 🟧 🟧 🟧 🟧 🟧 +
Slide property	- 🟧 🟧 🟧 ⬜️ ⬜️ +	Coefficient of friction, dynamic, against steel: µ 0.15 - 0.20
Wear resistance under water	- 🟧 🟧 🟧 🟧 ⬜️ +
Media resistance	- 🟧 🟧 🟧 🟧 🟧 +	More information on media resistance
Resistant to edge pressures	- 🟧 🟧 🟧 ⬜️ ⬜️ +
Resistant to shock and impact loads	- 🟧 🟧 🟧 ⬜️ ⬜️ +
Dirt resistance	- 🟧 🟧 ⬜️ ⬜️ ⬜️ +

When do I use this material?

When extreme wear resistance is required for soft shafts
When maximum wear resistance is required at temperatures above +100°C
When vibrations and edge loads occur
When the bearing needs to be resistant to chemicals

When do I use a different material?

If hardened shafts are planned iglidur W300
When room temperatures prevail -> iglidur G, iglidur J, iglidur W300
If a cost-effective universal plain bearing is required -> iglidur G

Download data sheet

Temperatures

The maximum long-term permissible application temperature is +200°C. At temperatures above +100°C, additional protection is required. In this case, however, the wear resistance of the bearing is very good and occupies a leading position among all iglidur materials. The compressive strength of iglidur V400 plain bearings decreases with increasing temperatures.

Temperatures, coefficient of thermal expansion

min. application temperature	Upper application temperature, long-term	Upper application temperature, short-term	In addition secure axially from
-50°C	+200°C	+240°C	+100°C

Permissible surface speeds

iglidur V400 also permits high surface speeds due to its high temperature resistance. The very favourable coefficients of friction of the bearing allows maximum surface speeds of up to 1.3m/s. The permissible linear speeds are even higher and can reach 3m/s in the short term.

Surface speeds of various iglidur materials

Maximum surface speed [m/s]	Rotating	Oscillating	linear
Long-term	0.9	0.6	2.0
Short-term	1.3	0.9	3.0

Permissible pv values

pv value, max. (dry)

MPa - m/s

0,50

Information on pv value and lubrication

Mechanical specifications

The maximum recommended surface pressure is a mechanical material parameter. Conclusions about the tribology cannot be drawn from this. The compressive strength of iglidur V400 plain bearings decreases with increasing temperatures. Diagram 02 illustrates this relationship. In addition, the limit of the permissible load at +100°C is still very high at 20MPa. The high flexibility is also shown in diagram 03.

Friction and wear

The coefficient of friction depends on the load on the bearing (diagrams 04 and 05). In addition, the coefficients of friction of iglidur V400 is very uniform. No other iglidur plain bearing material shows a smaller variation in the coefficient of friction in laboratory tests, even if the shaft material is changed.

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

iglidur V400	dry	Greases	Oil	Water
Coefficient of friction μ	0.15 - 0.20	0.09	0.04	0.04

Shaft materials

The influence of the shaft material on wear resistance is greater than that of friction. Considerable differences can occur here even at low loads (0.75MPa), as diagram 06 shows. In terms of wear, iglidur V400 plain bearings perform better in rotating applications than in pivoting movements (diagram 07).

Further information on shaft materials

Chemical resistance

iglidur V400 plain bearings have good chemical resistance. They are resistant to cleaning agents, greases, oils, alcohol, solvents, diluted alkalis and diluted acids.

All data at room temperature [+20 °C], + resistant 0 conditionally resistant - non-resistant

Chemicals	Resistance
Alcohols	+
Greases, oils without additives	+
Hydrocarbons	+
Fuels	+
Strong alkalines	-
Strong acids	+
Diluted alkalines	+
Diluted acids	+

Moisture absorption

The moisture absorption of iglidur V400 plain bearings is only 0.2% when saturated in water.

Maximum moisture absorption

at +23°C/50% room humidity.

0.1% weight

Maximum total moisture absorption

0.2% weight

Table 06: Moisture absorption

Installation tolerances

iglidur V400 plain bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed for press-fit into a housing machined to a H7 tolerance. After installation in a housing with nominal dimensions, the inner diameter of the bearings with E10 tolerance adjusts automatically. For certain dimensions, the tolerance deviates from this depending on the wall thickness (see product range).

Important tolerances according to ISO 3547-1 after press-fit:

Average d1 [mm]	Housing H7 [mm]	iglidur V400 plain bearing F10 [mm]	Shaft h9 [mm]
up to 3	+0.000 +0.010	+0.006 +0.046	-0.025 +0.000
> 3 up to 6	+0.000 +0.012	+0.010 +0.058	-0.030 +0.000
> 6 up to 10	+0.000 +0.015	+0.013 +0.071	-0.036 +0.000
> 10 up to 18	+0.000 +0.018	+0.016 +0.086	-0.043 +0.000
> 18 up to 30	+0.000 +0.021	+0.020 +0.104	-0.052 +0.000
> 30 up to 50	+0.000 +0.025	+0.025 +0.125	-0.062 +0.000
>50 to 80	+0.000 +0.030	+0.030 +0.150	-0.074 +0.000
>80 to 120	+0.000 +0.035	+0.036 +0.176	-0.087 +0.000
> 120 up to 180	+0.000 +0.040	+0.043 +0.203	+0.000 +0.100

Thermal conductivity

[W/m · K] 0.24

ASTM C 177

Coefficient of thermal expansion

(at +23°C) [K-1 · 10-5] 3

DIN 53752

Compressive strength

47MPa

Vacuum

In a vacuum, any moisture present will outgas. Use in a vacuum is only possible to a limited extent.

Radioactive radiation

Plain bearings made of iglidur V400 are resistant to radiation up to a radiation intensity of 2 · 104Gy. Higher radiation levels affect the mechanical specifications.