deva metal sliding bearings Maintenance free self lubricating World Class Bearing Technology 2 Federal Mogul DEVA GmbH Modern designs place huge demands on today s bearing materials requiring zero maintenance even under severe to extreme operating conditions and maximum loads Moreover the permanent cost pressure calls for increasing uptime availability of machines and plants and uncompromising standards of operational reliability With the DEVA range of maintenance free self lubricating heavy duty friction materials it is possible to produce self lubricating bearings with guaranteed long term reliability deva metal materials are suitable for applications with high static and dynamic loads Due to the micro distribution of the lubricant all deva metal materials are also equally suitable for small movements At the same time the form of movement whether translational rotational or a combination of both is insignificant The deva metal material range is also characterised by the following properties high wear resistance insensitive to impact stress resistant to harsh operational and ambient conditions of mechanical or chemical nature The deva metal material range provides the design engineer with countless opportunities wherever environmentally friendly lubrication is either desired or required or where conventional lubrication is not possible High performance material Solid lubricants embedded in metal matrix deva metal 3 deva metal maintenance free Federal Mogul DEVA GmbH Content Material properties Material structure Materials Mating Materials Fits and tolerances Design Installation Finishing Recommended dimensions Data relevant to the design of DEVA bearings 5 5 7 11 12 14 17 19 20 21 page 1 2 3 4 5 6 7 8 9 10 Profit from more than 60 years of experience in self lubricating sliding bearings Make use of our extensive material and application expertise spanning a very wide range of industries Let our application engineering team assist you in the selection of the bearing materials design purpose built to your requirements assembly and installation calculation of estimated life time Benefit from the latest material developments tested using state of the art facilities Ask for a simulation of your bearing application on our test rigs Let us analyse your bearing problem by FEM Expect the highest quality standards certified to DIN ISO 9001 2008 ISO TS 16949 2009 and DIN EN ISO 14001 2004 Our bearing service 4 Federal Mogul DEVA GmbH 1 Material properties deva metal is a family of high performance self lubricating bearing materials The deva metal system is based on four main groups bronze iron nickel and stainless steel each containing dry solid lubricant most commonly graphite uniformly dispersed within the metal matrix Important selection criteria are the sliding speed specific load temperature and other application specific influences deva metal normally requires no lubrication provides maintenance free operation has high static and dynamic load capacity has good frictional properties with negligible stick slip can be used in dusty environments can be used dependent on alloy in a temperature range of 200 C to 800 C grades may be selected to tolerate corrosive applications has no water absorption and is therefore dimension ally stable suitable for use in sea water and many commercial liquids alloys are available for use in radioactive environ ments is electrically conductive No signs of electrostatic charging occur is suitable for translatory rotational and oscillating movements with cylindrical guide or also for direct surface use These movements can occur individually or in combination is used where conventional lubrication is not possible offers advantages for low cost lubrication in com parison to conventional bearing materials can be used as back up bearing for hydrodynamic lubrication can be used with hydrodynamic water lubrication 2 Material structure All deva metal alloys share a common metallurgical microstructure of a solid lubricant uniformly distributed throughout a metal matrix The properties of the metal matrix determine the general physical mechanical and chemical properties of the material and are the basis on which an initial alloy selection is made for a specific application A selection of four main groups is available 2 1 Alloys Bronze base Iron base Nickel base Stainless steel base 5 deva metal maintenance free Federal Mogul DEVA GmbH deva metal solid lubricant distribution structures show the following microstructures which are used according to the application specific requirement These different structures and distributions can be used in all four main groups 2 2 Solid lubricants Solid lubricant distribution structures of different deva metal alloys Fine distributionMedium distributionCoarse distribution 1 Alloy 2 Solid lubricant 2 1 2 1 2 1 1 Alloy 2 Solid lubricant 1 Alloy 2 Solid lubricant Figure 2 1 1 Solid lubricants properties Table 2 1 1 PropertiesGraphiteMoS2 Crystal structurehexagona