iglidur® HSD350 – material data

Technical data

General specification

Unit

iglidur® HSD350

Test method

density

g/cm³

1,39

DIN EN ISO 1183-1

Colour

beige

max. Moisture absorption at 23°C/50% room humidity.

% by weight

0,6

ISO 175

max. total moisture absorption

wt.-%

1,2

ISO 62

coefficient of friction, dynamic, against steel

0,07 - 0,23

pv value, max. (dry)

MPa - m/s

0,30

Mechanical specification

flexural modulus

MPa

2.150

DIN EN ISO 178

flexural strength at +20°C

MPa

DIN EN ISO 178

Compressive strength

MPa

max. recommended surface pressure (+20°C)

MPa

Shore D hardness

DIN 53505

Physical and thermal specification

Upper application temperature long-term

°C

+180

Upper application temperature short-term

°C

+210

Lower application temperature

°C

-40

thermal conductivity

[W/m · K]

0,24

ASTM C 177

coefficient of thermal expansion (at +23°C)

[K-1 · 10-5]

DIN 53752

Electrical specification

Volume resistivity

Ωcm

> 1013

DIN IEC 93

surface resistance

> 1014

DIN 53482

Table 01: Material properties

Download data sheet

Diagram 01: Permitted pv values for iglidur® HSD350

iglidur® HSD350 was specially developed for use in applications where decontamination by superheated steam (e.g. in autoclaves) is necessary. Here, iglidur® HSD350 offers an outstanding price-performance ratio.

Mechanical specification
The compressive strength of iglidur® HSD350 plain bearings decreases with increasing temperatures. diagram. 02 illustrates this relationship. The maximum recommended surface pressure represents a mechanical material parameter. Conclusions about the tribology cannot be drawn from this.

diagram. 03 shows the elastic deformation of iglidur® under radial load. Under the maximum recommended surface pressure of 30 MPa, the deformation is less than 2 %. Possible plastic deformation depends, among other things, on the duration of the impact.

Maximum surface speed

m/s

rotating

oscillating

linear

long-term

1,1

0,8

3,0

short-term

1,2

1,0

3,2

Table 02: Maximum surface speed

Permissible sliding speeds
Due to its relatively good thermal conductivity and thermal resistance, iglidur® HSD350 is suitable for speeds in the medium range. The permissible surface speed decreases with increasing surface pressure.

iglidur® HSD350

Application temperature

below

-40°C

upper, long-term

+180°C

upper, short-term

+210°C

additional axial protection from

+130°C

Table 03: Temperature limits

Temperature
The ambient temperature strongly influences the specification of plain bearings. In accordance with its area of application as a material that can be sterilised with hot steam, iglidur® HSD350 offers good thermal resistance. At temperatures above 130 °C, a locating spigot of the bearing is required.

Friction and wear
The coefficient of friction increases slowly and evenly over the speed, but remains below 0.3 μ up to a speed of 2.0 m/s.

Shaft materials
Diagrams 05 and 06 show an extension of the results of tests with different shaft materials, which were carried out with plain bearings made from iglidur® HSD350. At 0.3 m/s and 1 MPa surface pressure, a wide variety of shafts are suitable and deliver good wear results. Hard anodised aluminium, free cutting steel, hard chrome plated Cf53, 304 SS and high grade steel show low bearing wear. If your intended shaft material is not included in the test results presented here, please contact us.

Shaft materials

Wear for oscillating and rotating applications with steel

Chemicals

Resistance

Alcohols

+ to 0

hydrocarbons

Greases, oils, not additivated

Fuels

+ to 0

Diluted acids

strong acids

Dilute bases

strong bases

+ resistant 0 conditionally resistant - not resistant

All data at room temperature [+20 °C]
Table 04: chemical resistance

Moisture absorption
The moisture absorption of iglidur® HSD350 bearings is about 0.6% by weight in a normal climate. The saturation limit in water is 1.2% by weight. These values are so low that a consideration of the swelling due to moisture absorption is only necessary in extreme cases.

Ø d1**[mm]**

housing H7**[mm]**

plain bearing F10**[mm]**

shaft h9**[mm]**

to 3

+0,000 +0,010

+0,006 +0,046

-0,025 +0,000

> 3 to 6

+0,000 +0,012

+0,010 +0,058

-0,030 +0,000

> 6 to 10

+0,000 +0,015

+0,013 +0,071

-0,036 +0,000

> 10 to 18

+0,000 +0,018

+0,016 +0,086

-0,043 +0,000

> 18 to 30

+0,000 +0,021

+0,020 +0,104

-0,052 +0,000

> 30 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 to 180

+0,000 +0,040

+0,043 +0,203

+0,000 +0,100

Table 05: Important tolerances according to ISO 3547-1 after press-fitting

Installation tolerances
iglidur® HSD350 bearings are standard bearings for shafts with h-tolerance (recommended minimum h9). The bearings are designed to be pressed into an H7-toleranced mounting. After installation in a mounting with nominal dimensions, the inner diameter of the bearing with F10 tolerance adjusts itself automatically. For certain dimensions, the tolerance deviates from this depending on the wall thickness (see product range). Compared to the installation tolerance, the inner diameter changes depending on the moisture absorption.