The Design of Rolling Bearing Mountings

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124 Data wheelThe data wheel is supported on a clearance-free FAGfour-point bearing with the dimensions 1,300 x 1,500x 80 mm.Radial runout < 10 µm,Axial runout < 25 µm.Lubrication, sealingThe four-point bearing is fully immersed in oil.Sealing by a multiple labyrinth.Machining tolerancesThe four-point bearing is fitted according to the actualbearing dimensions.124: Data wheel177 FAG
GlossaryAdditivesAdditives are oil-soluble substances added to mineraloils or mineral oil products. By chemical or physicalaction, they change or improve lubricant properties(oxidation stability, EP properties, foaming, viscositytemperaturebehaviour, setting point, flow properties,etc.). Additives are also an important factor in calculatingthe attainable life (cp. also Factor K).Adjusted bearing arrangement/ AdjustmentAn adjusted bearing arrangement consists of two symmetricallyarranged angular contact bearings or thrustbearings. During mounting, one bearing ring (for an Oarrangement, the inner ring; for an X arrangement, theouter ring) is displaced on its seat until the bearing arrangementhas the appropriate axial clearance or the requiredpreload. This means that the adjusted bearingarrangement is particularly suitable for those caseswhere a close axial guidance is required, for example,for pinion bearing arrangements with spiral toothedbevel gears.Adjusted bearing arrangement(O arrangement)Adjusted bearing arrangement(X arrangement)Adjusted rating life calculationThe nominal life L or L h deviates more or less from thereally attainable life of rolling bearings.Therefore, the adjusted rating life calculation takesinto account, in addition to the load, the failure probability(factor a 1 ) and other significant operating conditions(factor a 23 in the FAG procedure for calculatingthe attainable life).Cp. also Modified life in accordance with DIN ISO 281.AlignmentSelf-aligning bearings are used to compensate for misalignmentand tilting.Angular contact bearingsThe term "angular contact bearing" is collectively usedfor single-row bearings whose contact lines are inclinedto the radial plane. So, angular contact bearings are angularcontact ball bearings, tapered roller bearings andspherical roller thrust bearings. Axially loaded deepgroove ball bearings also act in the same way as angularcontact bearings.Arcanol (FAG rolling bearing greases)FAG rolling bearing greases Arcanol are field-provenlubricating greases. Their scopes of application were determinedby FAG by means of the latest test methodsunder a large variety of operating conditions and withrolling bearings of all types. The eight Arcanol greaseslisted in the table on page 179 cover almost all demandson the lubrication of rolling bearings.Attainable life L na , L hnaThe FAG calculation method for determining the attainablelife (L na , L hna ) is based on DIN ISO 281 (cp.Modified life). It takes into account the influences ofthe operating conditions on the rolling bearing life andindicates the preconditions for reaching endurancestrength.L na =a 1 · a 23 · L [10 6 revolutions]andL hna =a 1 · a 23 · L h [h]a 1 factor a 1 for failure probability(DIN ISO 281);for a normal (10%) failure probability a 1 = 1.a 23 factor a 23 (life adjustment factor)L nominal rating life [10 6 revolutions]L h nominal rating life [h]If the quantities influencing the bearing life (e. g. load,speed, temperature, cleanliness, type and condition oflubricant) are variable, the attainable life (L hna1 ,L hna2 , ...) under constant conditions has to be determinedfor every operating time q [%]. The attainablelife is calculated for the total operating time using theformulaL hna =100q 1 +q 2 +q 3L hna1 L hna2 L hna3FAG 178
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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
Page 127 and 128: 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: 123 Azimuth axis (track roller and
Page 181 and 182: GlossaryAxial clearanceThe axial cl
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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