The Design of Rolling Bearing Mountings

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GlossaryArcanol rolling bearing greases · Chemo-physical data · Directions for useArcanol Thickener Base oil Consistency Temperature Colour Main characteristicsBase oil viscosity NLGI- range Typical applicationsat 40°C Classmm 2 /s DIN 51818 °C RALL12V Polyurea ISO VG 2 –30...+160 2002 Special grease for high temperaturesMineral oil 100 vermillionCouplings, electric machines(motors, generators)L71V Lithium soap ISO VG 3 –30...+140 4008 Standard grease for bearings with O.D.s > 62 mmMineral oil 100 signal violetLarge electric motors,wheel bearings for motor vehicles,ventilatorsL74V Special soap ISO VG 2 –40...+120 6018 Special grease for high speeds and low temperaturesSynthetic 22 yellow-greenoilMachine tools,spindle bearings,instrumentsL78V Lithium soap ISO VG 2 –30...+130 1018 Standard grease for bearings with O.D.s ≤ 62 mmMineral oil 100 zinc yellowSmall electric motors,agricultural and construction machinery,household appliancesL79V Synthetic 390 2 –30...+270 1024 Special grease for extremely high temperatures andSynthetic yellow ochre chemically aggressive environmentsoilTrack rollers in bakery machines,piston pins in compressors,kiln trucks, chemical plants(please observe safety data sheet)L135V Lithium soap 85 2 –40...+150 2000 Special grease for high loads,wit EP additivesyellow orange high speeds, high temperaturesMineral oilRolling mills, construction machinery,motor vehicles, rail vehicles,spinning and grinding spindlesL186V Lithium soap ISO VG 2 –20...+140 7005 Special grease for extremely high loads,with EP additives 460 mouse-grey medium speeds, medium temperaturesMineral oilHeavily stressed mining machinery,construction machinery,machines with oscillating movementsL223V Lithium soap ISO VG 2 –10...+140 5005 Special grease for extremely high loads, low speedswith EP additives 1000 signal blueMineral oilHeavily stressed mining machinery,construction machinery,particularly for impact loads and large bearings179 FAG
GlossaryAxial clearanceThe axial clearance of a bearing is the total possible axialdisplacement of one bearing ring measured withoutload. There is a difference between the axial clearanceof the unmounted bearing and the axial operating clearanceexisting when the bearing is mounted and runningat operating temperature.load. This ring is circumferentially loaded. Bearingswith circumferential load must be mounted with atight fit to avoid sliding (cp. Point load, Oscillatingload ).Circumferentialload on innerringImbalanceBase oilis the oil contained in a lubricating grease. The amountof oil varies with the type of thickener and the greaseapplication. The penetration number and the frictionalbehaviour of the grease vary with the amount of baseoil and its viscosity.Basic a 23II valueWeightRotating inner ringConstant load directionCircumferentialload on outerringStationary inner ringDirection of load rotatingwith outer ringImbalanceThe basic a 23II value is the basis for determining factora 23 , used in attainable life calculation.Bearing lifeThe life of dynamically stressed rolling bearings, as definedby DIN ISO 281, is the operating time until failuredue to material fatigue (fatigue life).By means of the classical calculation method, a comparisoncalculation, the nominal rating life L or L h , isdetermined; by means of the refined FAG calculationprocess, the attainable life L na or L hna is determined (seealso factor a 23 ).CageThe cage of a rolling bearing prevents the rolling elementsfrom rubbing against each other. It keeps themevenly spaced and guides them through unloaded sectionsof the bearing circumference.The cage of a needle roller bearing also has to guidethe needle rollers parallel to the axis. In the case of separablebearings the cage retains the rolling element set,thus facilitating bearing mounting. Rolling bearingcages are classified into the categories pressed cages andmachined/moulded cages.Circumferential loadIf the ring under consideration rotates in relation tothe radial load, the entire circumference of the ring is,during each revolution, subjected to the maximumWeightRotating outer ringConstant load directionCleanliness factor sThe cleanliness factor s quantifies the effect of contaminationon the attainable life. The product of s and thebasic a 23II factor is the factor a 23 .Contamination factor V is required to determine s.s = 1 always applies to normal cleanliness (V = 1).With improved cleanliness (V = 0.5) and utmostcleanliness (V = 0.3) a cleanliness factor s > 1 is obtainedfrom the right diagram (a) on page 181, basedon the stress index f s* and depending on the viscosityratio .s = 1 applies to < 0.4.With V = 2 (moderately contaminated lubricant) toV = 3 (heavily contaminated lubricant), s < 1 is obtainedfrom diagram (b).Combined loadStationary outer ringDirection of load rotatingwith inner ringThis applies when a bearing is loaded both radially andaxially, and the resulting load acts, therefore, at theload angle .Depending on the type of load, the equivalent dynamicload P or the equivalent static load P 0 is determinedwith the radial component F r and the thrust componentF a of the combined load.FAG 180
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PrefaceThis publication presents de
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ContentsExample Title . . . . . . .
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assembly is contracted. Thus the ra
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Current insulationWhere converter c
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4 Electric motor for domestic appli
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PulleyDrum5: Drum mounting of a dom
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6: Rotor bearing arrangement of a v
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7: Rotor bearing arrangement of a m
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9-18 Work spindles of machine tools
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10 NC-lathe main spindleOperating d
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13 High-speed motor milling spindle
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15 Vertical high-speed milling spin
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17 External cylindrical grinding sp
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19 Rotary table of a vertical lathe
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21 Rough-turning lathe for round ba
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22: Flywheel bearing arrangement of
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24 Double-shaft circular sawOperati
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Rollbending bearingsA counterbendin
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27 Spur gear transmission for a rev
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The effects of basing the bearing d
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29 Bevel gear - spur gear transmiss
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31 Worm gear pairOperating dataInpu
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at least normal cleanliness (contam
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33 Manual gearbox for trucksOperati
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34 Final drive of a passenger carOp
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Driven and non-steered rear wheel36
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38 Steering king pin of a truckA va
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40 Water pump for passenger car and
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42 Axle box roller bearings of an I
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43-44 UIC axle box roller bearings
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45Axle box roller bearingsof series
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47Axle box roller bearingsof the Ch
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48 Axle box roller bearings for an
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50Axle box roller bearingsaccording
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52Universal quill drivefor threepha
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54 Spur gear transmission for the u
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55 Bevel gear transmission for city
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56- 57 Spherical roller bearings as
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60 Spade-type rudderDesignThe slewi
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61-62 Ship shaft bearings and stern
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63-64 Ship shaft thrust blocksThe t
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64a: Complete ship shaft thrust blo
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65 RefinersWood chips from the wood
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66 Suction rollsSuction rolls are f
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68 Dryer rollsThe remaining water i
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69 Guide rollsGuide rolls guide, as
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70 Calender thermo rollsThe paper p
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71 Anti-deflection rollsAnti-deflec
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73 Run wheel of a material ropewayO
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74 Rope return sheaves of a passeng
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75 Rope sheave (underground mining)
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76 Rope sheave of a pulley blockIn
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77 Crane pillar mounting with a sph
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79 Roller track assemblyThe radial
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80 Crane run wheelOperating dataWhe
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81 Crane hookThe load suspended fro
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83 Head pulley of a belt conveyorOn
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Internal bearings for the tension/8
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Belt conveyor idlersMany industries
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87 Bucket wheel shaft of a bucket w
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89 Drive unit of a finished goods e
Page 129 and 130: 91 Vibrating road rollerThe vibrati
Page 131 and 132: 92 Double toggle jaw crusherDouble
Page 133 and 134: 94 Double-shaft hammer crusherDoubl
Page 135 and 136: 95 Ball tube millTube mills are mos
Page 137 and 138: 96 Support roller of a rotary kilnR
Page 139 and 140: Vibrating machinesVibrating screens
Page 141 and 142: 98 Two-bearing screen with straight
Page 143 and 144: 99 Four-bearing screenThe vibration
Page 145 and 146: 101-103 Large capacity convertersCo
Page 147 and 148: 104Roll bearings of afour-high cold
Page 149 and 150: Work rolls for the finishing sectio
Page 151 and 152: 107 Combined reduction and cogging
Page 153 and 154: 108 Work rolls of a section millThe
Page 155 and 156: Two-high rolls of a dressing stand1
Page 157 and 158: 110 Straightening rolls of a rail s
Page 159 and 160: 111 Disk ploughIn a disk plough the
Page 161 and 162: 112 Plane sifterSifters are used in
Page 163 and 164: Printing pressesPrinting quality is
Page 165 and 166: 114 Blanket cylinder of a sheet-fed
Page 167 and 168: 116 Axial piston machineCylinder bl
Page 169 and 170: 117 Axial piston machineOperating d
Page 171 and 172: 119 Hot gas fanGas temperature 150
Page 173 and 174: 121 Optical telescopeOperating data
Page 175 and 176: 122-124 RadiotelescopeFor radioastr
Page 177 and 178: 123 Azimuth axis (track roller and
Page 179: GlossaryAdditivesAdditives are oil-
Page 183 and 184: GlossaryContamination factor VThe c
Page 185 and 186: GlossaryEP additivesWear-reducing a
Page 187 and 188: Glossary1. Safe retention and unifo
Page 189 and 190: GlossaryLoad angleThe load angle i
Page 191 and 192: Glossaryload and the ring to be fit
Page 193 and 194: Glossaryaligning ball bearings, bar
Page 195 and 196: GlossaryViscosityViscosity is the m
Page 197 and 198: NotesFAG 196
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The Design of Rolling Bearing Mountings

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