Marginally lubricated

More documents

Recommendations

Info

BearingAssembly7AlignmentAccurate alignment is an important considerationfor all bearing assemblies. With DXbearings misalignment over the length of abush (or pair of bushes), or over the diameterof a thrust washer should not exceed0.020 mm as illustrated in Fig. 28.Fig. 28:AlignmentSealingWhile DX can tolerate the ingress of somecontaminant materials into the bearingwithout loss of performance, where there isthe possibility of highly abrasive materialentering the bearing, a suitable sealingarrangement, as illustrated in Fig. 29should be provided.Fig. 29:Recommended sealing arrangementsAxial LocationWhere axial location is necessary, it is generallyadvisable to fit DX thrust washers inconjunction with DX bushes, even whenthe axial loads are low. ExperienceFitting of Thrust WashersDX thrust washers should be located onthe outside diameter in a recess as shownin Fig. 30. The inside diameter must beclear of the shaft in order to prevent contactwith the steel backing of the DX material.The recess diameter should be 0.125mm larger than the washer diameter andthe depth as given in the product tables.has shown that fretting debris from unsatisfactorylocating surfaces can enter anadjacent DX bush and adversely affect thebearing life and performance.If there is no recess for the thrust washerone of the following methods of fixing maybe used:• two dowel pins• two screws• adhesive27
7 BearingAssemblyFig. 30:Installation of Thrust-WasherImportant Note• Dowel pins should be recessed 0.25 mmbelow the bearing surface• Screws should be countersunk 0.25 mmbelow the bearing surface• DX must not be heated above 130 °C• Contact adhesive manufacturers for guidanceon the selection of suitable adhesives• Protect the bearing surface to preventcontact with adhesive• Ensure the washer ID does not touch theshaft after assembly• Ensure that the washer is mounted withthe steel backing to the housingSlidewaysDX strip material for use as slideway bearingsshould be installed using one of thefollowing methods:• countersunk screws• adhesives• mechanical locationFig. 31:Mechanical location of DX slideways28
Page 1 and 2: DXMarginally lubricatedDesigner´s
Page 3 and 4: Formula Symbols and DesignationsFor
Page 5 and 6: 1 Introduction1 IntroductionThe pur
Page 7 and 8: 3 Properties3 Properties3.1 Physica
Page 9 and 10: 4 LubricationGreaseThis is the reco
Page 11 and 12: 4 LubricationBoundary lubricationCh
Page 13 and 14: 4 LubricationTable 4: Viscosity dat
Page 15 and 16: 5 Design FactorsSpecific load limit
Page 17 and 18: 5 Design Factors3.02.5Speed/Load fa
Page 19 and 20: 5 Design Factors5.7 Bearing SizeFri
Page 21 and 22: 5 Design Factors5.9 Worked Examples
Page 23 and 24: 7 BearingAssembly7 Bearing Assembly
Page 25 and 26: 7 BearingAssemblyFluid LubricationT
Page 27: 7 BearingAssembly7.4 InstallationIm
Page 31 and 32: 8 Machining8.3 ReamingDX can be rea
Page 33 and 34: 9 Electroplating9 ElectroplatingDX
Page 35 and 36: 10 StandardProductsPart No.PM 1515
Page 41 and 42: 10 StandardProducts10.2MB-DX cylind
Page 43 and 44: 10 StandardProductsPart No.max.D i
Page 45 and 46: 10 StandardProductsPart No.MB 10560
Page 47 and 48: 10 StandardProductsPart Nr.14DX1214
Page 49 and 50: 10 StandardProducts10.4DX Thrust Wa
Page 51 and 52: 10 StandardProducts10.6DX Strip - m

Marginally lubricated

Create successful ePaper yourself

Delete template?

Save as template?