The Design of Rolling Bearing Mountings

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49 Axle box roller bearings for a city trainThe bogie frame is supported by Chevron springs onthe axle boxes.Operating dataThe equivalent dynamic load P m = 37 kN (calculatedfrom the various load conditions).Mean wheel diameter 640 mm.Maximum speed v max = 80 km/h.Bearing clearancePrior to mounting, the axial clearance of the bearingunit TAROL 90 is 530 – 630 microns.Machining tolerancesThe bearing cones carry circumferential load and aretherefore given a tight fit: journal n6.Bearing selectionThe main component of the FAG bearing unitsTAROL 90 used here is a double row tapered rollerbearing whose main dimensions are (d x D x B overallwidths cones/cup) 90 x 154 x 106/115 mm.Lubrication, sealingLubrication is with a lithium soap base grease. TheTAROL 90 is sealed at both ends with lamellar rings.The backing ring also has a collar which forms a gaptypeseal with the lid on the wheel side.49: Axle box roller bearings for a city train71 FAG
50Axle box roller bearingsaccording to AAR standard*) and modified typesThe FAG TAROL unit according to AAR standards isa compact bearing unit with a double row tapered rollerbearing as the main component. Seals at both sidesof the bearing, accessories and the grease filling makethe FAG TAROL a ready-to-mount unit. Neither isthe adjustment of the bearing clearance required. Theso-called NFL design (no field lubrication) is consideredstandard today. These TAROL units are no longerrelubricated during operation. The bearing grease isonly renewed during a main inspection.FAG use two types of seals: the rubbing radial shaft seal(fig. a) corresponds to the design used by AAR. Thenon-rubbing lamellar seal ring (fig. b) was developedby FAG and tested and approved by AAR.TAROL units do not have to be mounted into a housing.An adapter is attached between the TAROL unitand the bogie frame to transmit the loads and supportthe bearing cup on the loaded part of the circumference.FAG supply NARROW and WIDE adapters accordingto the AAR standards as well as special adapters designedfor the particular cases of application.a: Rubbing radial shaft sealAAR has stipulated the admissible loads for the varioussizes of TAROL units.Components of the FAG tapered roller bearing unitTAROL1 Locking plate2 Cap screw3 End cap4 Bearing cup5 Bearing cone with roller set6 Spacer7 Seal wear ring8 Seal9 Backing ringb: Non-rubbing lamellar sealFAG also supply TAROL units in metric dimensions.They (fig. c) have narrower tapered roller bearings andsmaller sealing and retaining components than theAAR design. The relevant journals are also shorter resultingin lower bending stresses with the same shaftdiameter than in the case of the AAR arrangement.Higher wheel loads are therefore admissible.21378 5 6 4 7 8 950: TAROL unitswith a double-row tapered roller bearing*) Association of American Railroadsc: TAROL units in metric dimensions and with short journal(SK design)FAG 72
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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
Page 21 and 22: 9-18 Work spindles of machine tools
Page 23 and 24: 10 NC-lathe main spindleOperating d
Page 26 and 27: 13 High-speed motor milling spindle
Page 28 and 29: 15 Vertical high-speed milling spin
Page 30 and 31: 17 External cylindrical grinding sp
Page 32 and 33: 19 Rotary table of a vertical lathe
Page 34 and 35: 21 Rough-turning lathe for round ba
Page 36 and 37: 22: Flywheel bearing arrangement of
Page 38 and 39: 24 Double-shaft circular sawOperati
Page 40 and 41: Rollbending bearingsA counterbendin
Page 42 and 43: 27 Spur gear transmission for a rev
Page 44 and 45: The effects of basing the bearing d
Page 46 and 47: 29 Bevel gear - spur gear transmiss
Page 48 and 49: 31 Worm gear pairOperating dataInpu
Page 50 and 51: at least normal cleanliness (contam
Page 52 and 53: 33 Manual gearbox for trucksOperati
Page 54: 34 Final drive of a passenger carOp
Page 57 and 58: Driven and non-steered rear wheel36
Page 59 and 60: 38 Steering king pin of a truckA va
Page 61 and 62: 40 Water pump for passenger car and
Page 63 and 64: 42 Axle box roller bearings of an I
Page 65 and 66: 43-44 UIC axle box roller bearings
Page 67 and 68: 45Axle box roller bearingsof series
Page 69 and 70: 47Axle box roller bearingsof the Ch
Page 71: 48 Axle box roller bearings for an
Page 75 and 76: 52Universal quill drivefor threepha
Page 77 and 78: 54 Spur gear transmission for the u
Page 79 and 80: 55 Bevel gear transmission for city
Page 81 and 82: 56- 57 Spherical roller bearings as
Page 83 and 84: 60 Spade-type rudderDesignThe slewi
Page 85 and 86: 61-62 Ship shaft bearings and stern
Page 87 and 88: 63-64 Ship shaft thrust blocksThe t
Page 89 and 90: 64a: Complete ship shaft thrust blo
Page 91 and 92: 65 RefinersWood chips from the wood
Page 93 and 94: 66 Suction rollsSuction rolls are f
Page 95 and 96: 68 Dryer rollsThe remaining water i
Page 97 and 98: 69 Guide rollsGuide rolls guide, as
Page 99 and 100: 70 Calender thermo rollsThe paper p
Page 101 and 102: 71 Anti-deflection rollsAnti-deflec
Page 103 and 104: 73 Run wheel of a material ropewayO
Page 105 and 106: 74 Rope return sheaves of a passeng
Page 107 and 108: 75 Rope sheave (underground mining)
Page 109 and 110: 76 Rope sheave of a pulley blockIn
Page 111 and 112: 77 Crane pillar mounting with a sph
Page 113 and 114: 79 Roller track assemblyThe radial
Page 115 and 116: 80 Crane run wheelOperating dataWhe
Page 117 and 118: 81 Crane hookThe load suspended fro
Page 119 and 120: 83 Head pulley of a belt conveyorOn
Page 121 and 122: 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
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91 Vibrating road rollerThe vibrati
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92 Double toggle jaw crusherDouble
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94 Double-shaft hammer crusherDoubl
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95 Ball tube millTube mills are mos
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96 Support roller of a rotary kilnR
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Vibrating machinesVibrating screens
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98 Two-bearing screen with straight
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99 Four-bearing screenThe vibration
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101-103 Large capacity convertersCo
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104Roll bearings of afour-high cold
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Work rolls for the finishing sectio
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107 Combined reduction and cogging
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108 Work rolls of a section millThe
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Two-high rolls of a dressing stand1
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110 Straightening rolls of a rail s
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111 Disk ploughIn a disk plough the
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112 Plane sifterSifters are used in
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Printing pressesPrinting quality is
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114 Blanket cylinder of a sheet-fed
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116 Axial piston machineCylinder bl
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117 Axial piston machineOperating d
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119 Hot gas fanGas temperature 150
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121 Optical telescopeOperating data
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122-124 RadiotelescopeFor radioastr
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123 Azimuth axis (track roller and
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GlossaryAdditivesAdditives are oil-
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GlossaryAxial clearanceThe axial cl
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GlossaryContamination factor VThe c
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GlossaryEP additivesWear-reducing a
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Glossary1. Safe retention and unifo
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GlossaryLoad angleThe load angle i
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Glossaryload and the ring to be fit
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Glossaryaligning ball bearings, bar
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GlossaryViscosityViscosity is the m
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NotesFAG 196
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The Design of Rolling Bearing Mountings

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