iglidur® A350 - material data

The most important specifications at a glance

iglidur A350 plain bearings are made for practically all loads occurring in food and packaging machinery. Even high loads, often seen in lifting equipment, are taken easily and the bearings work flawlessly without any external lubrication.

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 0.10 - 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 FDA conformity is required
When wear resistance and FDA conformity are required for high loads
When the bearing is used in an acidic environment

When do I use a different material?

When temperatures permanently exceed +180°C -> iglidur A500
If only the highest wear resistance is required -> iglidur J
When an inexpensive FDA-compliant plain bearing is required -> iglidur A200, iglidur A180
For high speeds -> iglidur J

Download data sheet

Material data table

General properties	Unit	iglidur® A350	Testing method
Density	g/cm³	1.42
Colour		blue
Max. moisture absorption at +23°C/50% room humidity	% weight	0.6	DIN 53495
Max. moisture absorption	% weight	1.9
Coefficient of sliding friction, dynamic against steel	µ	0.10 - 0,20
pv value, max. (dry)	MPa x m/s	0.4
Mechanical properties
Flexural modulus	MPa	2,000	DIN 53457
Flexural strength at 20°C	MPa	110	DIN 53452
Compressive strength	MPa	78
Maximum recommended surface pressure (20°C)	MPa	60
Shore D hardness		76	DIN 53505
Physical and thermal properties
Max. long-term application temperature	°C	+180
Max. short-term application temperature	°C	+210
min. application temperature	°C	-100
Thermal conductivity	[W/m x K]	0.24	ASTM C 177
Coefficient of thermal expansion (at 23°C)	[K^-1 x 10^-5	8	DIN 53752
Electrical properties
Specific transitional resistance	Ωcm	> 10¹¹	DIN IEC 93
Surface resistance	Ω	> 10¹¹	DIN 53482

Temperatures

The temperature resistance makes iglidur A350 the ideal material for plain bearing in the food sector. Additional safety device is required at temperatures above +140°C. The wear rate of the iglidur A350 plain bearing increases only slightly at higher temperatures. Tests have shown good wear results at temperatures of +100°C on all shaft materials tested.

Temperatures, coefficient of thermal expansion

iglidur A350	Application temperature
Minimum	-100°C
Max. long-term	+180°C
Maximum, short-term	+210°C
In addition secure axially from	+140°C

Permissible surface speeds

iglidur A350 plain bearings are well suited for low and medium speeds in both rotating and oscillating applications. The wear rates are similar, so there is no preferred type of movement. Linear movements can also be supported well with iglidur A350. At high surface speeds, it should be checked whether iglidur J or iglidur L250 can be used, as the wear rate of these bearings is lower.

Surface speed of various iglidur materials

Maximum surface speeds [m/s]	Rotating	Oscillating	linear
permanent	1	0.8	2.5
Short-term	1.2	0.9	3

Permissible pv values

pv value, max. (dry)

MPa - m/s

0,40

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 A350 plain bearing decreases with increasing temperatures. Diagram 02 illustrates this relationship. Diagram 03 shows how iglidur A350 deforms elastically under radial load. Under the maximum surface pressure of 60MPa, the deformation is less than 5%.

Friction and wear

The coefficients of friction of iglidur A350 against steel is in a medium range (diagrams 04 and 05).

Coefficient of friction for iglidur A350 against steel (Ra = 1μm, 50 HRC):

iglidur A300	dry	Greases	Oil	Water
Coefficient of friction µ	0.1 - 0.2	0.09	0.04	0.04

Shaft materials

Corrosion-fee steels are naturally more suitable for use in the food industry. The tests were therefore carried out on such materials in particular. It has been shown that there is no clear favourite and that 304 SS, high grade steel and hard chrome-plated steel are all suitable. Hard anodised aluminium is also well suited for both linear and rotating movements.

Further information on shaft materials

Chemical resistance

iglidur A350 plain bearings are resistant to diluted acids and alkalis, alcohols and cleaning agents. They are also resistant to most lubricants. iglidur A350 plain bearings are resistant to common cleaning agents used in the food industry. iglidur A350 is attacked by esters, ketones, chlorinated hydrogens, aromatics and highly polar solvents.

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

Medium	Resistance
Alcohols	+
Hydrocarbons	+ up to 0
Greases, oils without additives	+
Fuels	+
Diluted acids	+
Strong acids	+
Diluted alkalines	+
Strong alkalines	+

Moisture absorption

The moisture absorption of iglidur A350 is low and can be neglected when using the standard plain bearing. Even when fully saturated, iglidur A350 does not absorb more than 1.9% water.

Maximum moisture absorption
at +23°C/50% r. humidity	0.6% weight
Max. moisture absorption	1.9% weight

Electrical properties

iglidur A350 plain bearings are electrically insulating.

Electrical properties
Specific transitional resistance	> 10¹¹ Ωcm
Surface resistance	> 10¹¹ Ω

Installation tolerances

iglidur A350 plain bearings are standard bearings for shafts with h-tolerance (recommended at least h9). The bearings are designed for the press-fit in a housing with H7 tolerance. After installation in a housing with nominal dimension, the inner diameter of the bearings with F10 tolerance adjusts itself automatically.

Diameter d1 [mm]	Shaft h9 [mm]	iglidur A350 plain bearing F10 [mm]	Housing H7 [mm]
up to 3	0 - 0.025	+0.006 +0.046	0 +0.010
> 3 up to 6	0 - 0.030	+0.010 +0.058	0 +0.012
> 6 up to 10	0 - 0.036	+0.013 +0.071	0 +0.015
> 10 up to 18	0 - 0.043	+0.016 +0.086	0 +0.018
> 18 up to 30	0 - 0.052	+0.020 +0.104	0 +0.021
> 30 up 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
>80 to 120	0 - 0.087	+0.036 +0.176	0 +0.035
> 120 up to 180	+0.100 + 0	+0.043 +0.203	0 +0.040