iglidur® J350 - material data

The most important specifications at a glance

iglidur J350 blends universally good wear resistance, flexibility and temperature resistance into a very versatile iglidur material with a broad application spectrum.

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?

If I am looking for a highly wear resistant bearing for medium and high load rotations
When a cost-effective plain bearing for high temperatures is required
When press-fit up to +150°C is required
When the bearing is exposed to shocks and impacts

When do I use a different material?

At temperatures above +180°C continuously -> iglidur X
When minimum friction is required -> iglidur J
When a cost-effective low-friction plain bearing is required -> iglidur D, iglidur R
For high peripheral speeds -> iglidur J

Material data table

General properties	Unit	iglidur J350	Testing method
Density	g/cm³	1.44
Colour		yellow
Max. moisture absorption at +23°C/50% room humidity	% weight	0.3	DIN 53495
Max. moisture absorption	% weight	1.6
Coefficient of sliding friction, dynamic against steel	µ	0.01 - 0.20
pv value, max. (dry)	MPa x m/s	0.45
Mechanical properties
Flexural modulus	MPa	2,000	DIN 53457
Flexural strength at 20°C	MPa	55	DIN 53452
Compressive strength	MPa	60
Maximum recommended surface pressure (20°C)	MPa	60
Shore D hardness		80	DIN 53505
Physical and thermal properties
Max. long-term application temperature	°C	+180
Max. short-term application temperature	°C	+220
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	7	DIN 53752
Electrical properties
Specific transitional resistance	Ωcm	> 10¹³	DIN IEC 93
Surface resistance	Ω	> 10¹⁰	DIN 53482

Download data sheet

Temperatures

The temperatures prevailing in the bearing system also have an influence on the bearing wear. The wear rate of the iglidur J350 bearings changes only slightly at higher temperatures. In some cases, the wear even decreases at +100°C. Additional protection is required at temperatures higher than +140°C.

Temperatures, coefficient of thermal expansion

min. application temperature	Upper application temperature, long-term	Upper application temperature, short-term	In addition secure axially from
-100°C	+180°C	+220°C	+140°C

Permissible surface speeds

iglidur J350 plain bearings are well suited for low and medium speeds in both rotating and oscillating applications. However, the wear rates are significantly better in rotating applications. Linear movements can also be supported well with iglidur J350.

Surface speeds of various iglidur materials

Maximum surface speeds [m/s]	Rotating	Oscillating	linear
permanent	1.3	1.0	4.0
Short-term	3.0	2.3	8.0

Permissible pv values

pv value, max. (dry)

MPa - m/s

0,45

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 J350 plain bearing decreases with increasing temperatures. Diagram 02 illustrates this relationship. iglidur J350 plain bearings are suitable for high and medium loads. Diagram 03 shows the deformation under temperature. The behaviour of the materials under short-term stress is shown here. Different ambient temperatures only become noticeable from approx. 60MPa.

Friction and wear

The coefficients of friction of iglidur J350 in dry operation against steel are in a very good range. They decrease significantly at higher surface speeds. This benefits the service life of the plain bearing in continuous operations with high surface speeds. Diagram 04 illustrates the relationship. Especially at loads greater than 2MPa, iglidur J350 plain bearings are clearly superior to other bearings in rotating applications.

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

iglidur J350	dry	Greases	Oil	Water
Coefficient of friction μ	0.10 - 0,20	0.09	0.04	0.04

Shaft materials

Diagrams 06 and 07 show an extension of the results of tests with different shaft materials. iglidur J350 plain bearings are suitable for all mating surfaces. However, one pairing stands out when you look at the wear data from the tests: iglidur J350 vs 304 stainless steel. There are not many bearing materials that are suitable for the otherwise rather difficult shaft partner stainless steel (304 stainless steel) and achieve the best wear rates. Excellent wear results are also achieved with hard-anodised aluminium shafts. If your intended shaft material is not included in the test results presented here, please contact us.

Further information on shaft materials

Chemical resistance

iglidur J350 plain bearings are resistant to diluted acids and alkalis, alcohols, cleaning agents and lubricants. iglidur J350 is affected by esters, ketones, chlorinated hydrogens, aromatics and highly polar solvents.

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

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

Moisture absorption

The moisture absorption of iglidur J350 is low and can be neglected when using the standard plain bearing. Even when fully saturated, iglidur J350 does not absorb more than 1.6% of water.

Maximum moisture absorption
at +23°C/50% r. humidity	0.3% weight
Max. moisture absorption	1.6% weight

Electrical properties

iglidur J350 plain bearings are electrically insulating.

Electrical properties
Specific transitional resistance	> 10¹³ Ωcm
Surface resistance	> 10¹⁰ Ω

Radioactive radiation

Plain bearings made of iglidur J350 are resistant to radiation up to a radiation intensity of 2 · 102Gy.

UV resistance

iglidur J350 plain bearings have limited resistance to UV radiation.

Vacuum

In a vacuum, iglidur J350 plain bearings only outgas to a very small extent. Use in a vacuum is possible for dry bearings

Thermal conductivity

[W/m · K] 0.24

ASTM C 177

Coefficient of thermal expansion

(at +23°C) [K-1 · 10-5] 7

DIN 53752

Compressive strength

[MPa] 60

Installation tolerances

iglidur J350 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 into a nominal size housing, in standard cases the inner diameter automatically adjusts to the F10 tolerances. For certain dimensions, the tolerance deviates from this depending on the wall thickness (see product range).

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

Diameter d1 [mm]	Shaft h9 [mm]	iglidur J350 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	+0.1 - 0.000	+0.043 +0.203	0 +0.040