SLFE 3002 - Sintered Iron Plain Bearing

Iron-Nickel-Sintered Metal - maintenance-free

3002 sintered iron-nickel plain bearing with graphite 

Material - Characteristics


Iron powder with the addition of copper, nickel and molybdenium, which enhance both the high temperature strength and the resistance to scaling, forms the basis of the metal matrix.


Furthermore a solid lubricant (99,9% pure, chemical neutral electro- graphite) is enclosed pre-loaded in micro distribution.


The alloy makes a quick, self-lubricating performance possible through the building-up of a firmly adhering graphite film on the mating material.





Application Data

temperature range

0 up to +600 °C (under vacuum conditions or protective atmosphere up to 850 °C)

max. PV value 1 MPa m/s
max. sliding velocity 0,4 m/s
max. surface pressure stat. 100 MPa - dyn. 50 MPa


thermal expansion 12,8 x 10-6 °C-1
solid lubricant 6% Graphite


frictional coefficient: 




For Bearing Design

Recommended minimum wall thickness a: (d = Ø bearing hole)

a = √ (d ⋅ 0,5) up to 10 N/mm²
a = √ (d ⋅ 0,6) over 10 to 25 N/mm²
a = √ (d ⋅ 0,8) over 25 N/mm²


Recommended fitting

shaft h7
housing H7
bearing inner diameter C7 (decreases down to D8 after pressed-in)
bearing outer diameter r6


Thermal expansion has to be taken into account at temperatures above 80 °C.



Mating Material

surface roughness Ra = 0,2 μm up to 0,8 μm
minimum hardness

> 180 HB

recommended hardness > 45HRC


In order to achieve ideal sliding and wearing properties, machine-building steel should be used, which is resistant to both deformation at elevated temperatures and scaling and which has a surface hardness of at least 45 HRC (in cold condition).