devabmMaintenancefree selflubricating bearings - PDF document

1 deva.bmMaintenance-free, self-lubricatin
deva.bmMaintenance-free, self-lubricating bearings World class bearings from DEVA save time and money. expertiseour application engineering team assist you in the: Technical Manual – Contents Material propertiespage 5 Material structurepage 5 Materialspage 6 Mating materialspage 8 Fitspage 9 Designpage 9 Installationpage 11 Available dimensionspage 15 bearings Introduction to modern-day bearing materials because, frequently,

2 uncompromising standards of operational
uncompromising standards of operational reliability. product is a self-lubricating composite bearing mate- is produced using a special sintering process•normally requires no lubrication.•allows maintenance-free operation.•possesses a high static and dynamic load-bearingcapacity.•has a low coefficient of friction.•is stick-slip-free.•offers a high margin of safety against mating material•is utilisable in dusty environments. a

3 re its highly It is additionally possibl
re its highly It is additionally possible to apply an initial surface filmconditions are purely dry. Where used with conventional sliding :graphite/9P:PTFE Solid lubricants used Material properties •is utilisable at temperatures ranging from -260 °C•is utilisable in corrosive environments.•does not absorb water and guarantees maximumdimensional accuracy.•is utilisable in seawater.•is utilisable in radioactive environments.•is

4 electrically conductive. No electrostati
electrically conductive. No electrostatic chargingeffects occur.•is suitable for rotational, oscillating and linear•is suitable for micro movements.•is suitable even for applications involving high edge PropertiesGraphite Crystalline structure 2.252.16 Coefficient of friction in air0.1 to 0.180.07 to 0.12 very goodvery good Corrosion resistancegoodvery good Use in radioactive radiationvery goodpoor very goodvery good very good

5 very good Use in vacuumpoorvery good Tab
very good Use in vacuumpoorvery good Table 2.1 – Solid lubricants Material structure 2 6 302 312 322 332 342 362/9P deva.bm Bearing properties320280 280-150280-150280-150120-150280-150260-260 MPa × m/s Table 3.1.2 – deva.bm bearing properties ––sliding speedMax.permissible load TemperatureFrictioncoefficientm/smax.min.°C°Cdepending onoperating cond. deva.bm 302 312 322 332 342 362/9P Materials unalloyed stainless

6 g/cm³Physical properties Hardn. (min.)
g/cm³Physical properties Hardn. (min.) 1 332 has lubrication indentations in the sliding layer.1.4301 or 1.4571 material data sheets,Table 3.1.1 – Steel backing and sliding layer properties of deva.bmTensile strength Linear thermal expansioncoefficient500 – 700500 – 700320320 Table 3.2.1 shows the chemical resistance of the alloys. Information on actual performance,however, is obtainable only by testing under realistic Stro

7 ng acids Hydrochloric acid520 Hydrofluor
ng acids Hydrochloric acid520 Hydrofluoric acid520 Nitric acid520 Sulphuric acid520 Phosphoric acid520 Weak acids Ethanoic acid520 Formic acid520 Boric acid520Citric acid520 Ammonia1020 Sodium hydroxide520Potassium hydroxide520 Acetone20 Carbon tetrachloride20 Ethyl alcohol20 Ethyl acetate20 Ethyl chloride20Glycerine20 Ammonium nitrate Calcium chloride Magnesium chloride Magnesium sulphate Sodium chloride Sodium nitrate Zinc c

8 hlorideZinc sulphate Ammonia gas Chlorin
hlorideZinc sulphate Ammonia gas Chlorine gas Carbon dioxide Sulphur dioxide Hydrogen sulphide Lubricants and fuels Paraffin20 Petroleum20 Fuel oil20 Diesel20 Mineral oil70 HFA - ISO46 oil-water emulsion70 HFC - water ethylene70HFD - phosphate ester70 Water20 Seawater20 Table 3.2.1 – Chemical properties of deva.bm alloys Chemical resistance3.2 ConcentrationTAlloyAlloyin %in °C302, bearing materials�130HB are also perm

9 issible. In is = 0.2 to 0.8 µm, produced
issible. In is = 0.2 to 0.8 µm, produced byoperating conditions. To obtain Mating materials4 Figure 4.1 – Influence of mating material surface roughness on the microwear of composite in [µm] – Specific wear 0.2 - 0.80.10.20.380.82.1 ZSt 60-2 C45 Comparable standardsMating materials for normal applications Grade 65 1045 X20Cr13 X17CrNi16-2 X90CrMoV18 X39CrMo17-1 Comparable standards 420 X4CrNiMoN27-5-2 Inconel 625 1.4460 Com

10 parable standards UNS531803 Table 4.1 –
parable standards UNS531803 Table 4.1 – Main possible mating materials 9 Permissible fit and tolerance ranges � 180 H9 H8 / H9 (Standard) H8 / H9 d7 Table 5.1 – Fits and tolerances Design Sliding surface design6.1 can be used with a plain sliding surface and can also Figure 6.1.2 – Sliding layer with cleaninggrooves -Tolerance is pressed into the housing with anor press-fit mandrel). Tapping or driving into place is•

11 The standard housing bore is H7.•Mean ro
The standard housing bore is H7.•Mean roughness of housing: R = 3.2 µm•The housing has a chamfer of 20 - 40° for easier•To achieve minimum clearances after mounting (IT7 can be provided Fits slidingIn installed state 10 Examples of design6.2 radial segment including mounting and screw joint axial segment with cleaning grooves Design 11 sliding bearings with D 550 mm 180 mmMounting ofa) Standard bearing (H9) with D 180 mm r

12 adial bearings 180 mm 2) slight oiling i
adial bearings 180 mm 2) slight oiling is permissiblewhen mountingslight oiling is permissiblewhen mounting Installation =Inner diameter=Inner diameter=Outer diameter=Bearing width=measured wall thickness=Housing bore diameter 12 sliding bearings with D 550 mm with countersunk flat head screws Thread toDIN 13 M5 element ± 0.1 D I S 2/2.5 2.5/3 3/5 sliding strips or in place sliding strips with countersunk flat head screw

13 s DIN EN ISO 2009 •Guide bush ensures co
s DIN EN ISO 2009 •Guide bush ensures correct•Oil during press-fitting bearings 13 sliding strips EN ISO 10642 sliding strips with hexagon socket countersunk head screws Thread toDIN 13 M5 supporting ± 0.1 ± 0.15 øD 2/2.5 2.5/3 3/5 Mounting 2, 2.5, 3 and 5 mm thick deva.bm in place sliding strips with hexagon socket countersunk head screws 6 Countersinking is also suitable for screws to DIN EN ISO 7045-1 and DIN EN ISO 20

14 09. 14 Hole spacing and mounting The num
09. 14 Hole spacing and mounting The number and size of the screws depends on the occurring stresses = 10 - 30 mm – if b 4 mm, should nicks be made as shown in the = 60 - 150 mm (1 - 1.5) D - hole spacing and mounting = t-0.1-0.2 with a pressure plate. 15 Available dimensions8 plain bearings bearings are made to DIN ISOhowever. Available ± 0.25 mm 152025304050607080100120140150160180200 0.40 0.50 0.75 0.70 1.00 Bore tol

15 erance (after mounting) H8 (Precision)/H
erance (after mounting) H8 (Precision)/H9 (Standard) + 2 Table 8.1.1 - Measurement table for deva.bm plain bearings (all sizes in mm) 1.5 bearings, D 550 mm,-welded, recommended. bearings are 332 and 362/9P 28 mm. deva.bm sliding plates 342 contour elements layer thickn. S 2.5 Table 8.2.1 – Measurement table for deva.bm sliding plates (all sizes in mm) ± 0.05 1) ± 0.05 1) ± 0.05 1) Different tolerances possible For

16 thickness Inner diameter 10 stripsslid
thickness Inner diameter 10 stripssliding layer at Outer diameter – Table 8.3.1 – Manufacturing restrictions for radial segments (all sizes in mm) depends on(see T Figure 8.3.1 – Radial segments Figure 8.3.3 – Sliding plate 2) Other thicknesses on request On request 9 BM 1 0 003 201 1750 A1 Design Data relevant to the design of DEVA bearings Description of application: Project/No. Floating bearing Spherical bearing Qua

17 ntity Item 1 Item 2Item 3 Inner diameter
ntity Item 1 Item 2Item 3 Inner diameterD Outer diameterD Bearing widthB Outer ring widthB Flange outer dia.D Flange thicknessS Wall thicknessS Plate lengthL Plate widthW Plate thicknessS (in mm) Item 1 Item 2Item 3 Static Radial load in kN Axial load in kN Surface pressure Radial in MPa Axial in MPa Loading Item 1 Item 2Item 3 Speed in rpm Sliding speed in m/s Stroke length in mm Double strokes/min Angle Frequency in n/min M

18 otion Item 1 Item 2Item 3 Continuous ope
otion Item 1 Item 2Item 3 Continuous operation Intermittent operation Days/years Frictional distance in km Operating time Item 1 Item 2Item 3%/h%/h%/h Bearing holder Fits and tolerances Item 1 Item 2Item 3 Temperature at bearing Contact medium Environm.conditions Item 1 Item 2Item 3°C°C°C Material No./type Hardness in HB/HRC in µm Item 1 Item 2Item 3 Mating materialNew design Desired Permissible wear Item 1 Item 2Item 3 Dry

19 running Medium lubrication Medium Assemb
running Medium lubrication Medium Assembly lubrication Dynamic viscosity Lubrication Item 1 Item 2Item 3 Company address / contact h Shaft rotates Angular motion Axial motion Fixed bearing Notes ity,however, can be accepted for any incorrect or incomplete information. The data given in the documentation are intended as an are subject, in principle, to our terms of sale and delivery as indicated in our offers, product reserves

20 the right to amend the specification or
the right to amend the specification or improve the technological data without prior notice.DEVA/9P, deva.metal and deva.eco are registered trade marks ofFederal-Mogul Deva GmbH, D-35260 Stadtallendorf, Germany. deva.bm BM-EN/01/2005/Rev.1/3000Federal-Mogul Deva GmbHPhone +49Telefax +49(0)6428 701-108info@deva.de · www.deva.de - Großefehn/German y Technical Manual Technical ManualTechnical Manual Technical Manual -in the hydr