The Design of Rolling Bearing Mountings PDF 1/8: Contents Rolling Bearings FAG OEM und Handel AG Publ. No. WL 00 200/5 EA The Design of Rolling Bearing Mountings Design Examples covering Machines, Vehicles and Equipment Publ. No. WL 00 200/5 EA FAG OEM und Handel AG A company of the FAG Kugelfischer Group Postfach 1260 · D-97419 Schweinfurt Telephone (0 97 21) 91-0 · Telefax (0 97 21) 91 34 35 Telex 67345-0 fag d Preface This publication presents design examples covering various machines, vehicles and equipment having one thing in common: rolling bearings. For this reason the brief texts concentrate on the roll- ing bearing aspects of the applications. The operation of the machine allows conclusions to be drawn about the operating conditions which dictate the bearing type and design, the size and arrangement, fits, lubri- cation and sealing. Important rolling bearing engineering terms are print- ed in italics. At the end of this publication they are summarized and explained in a glossary of terms, some supplemented by illustrations. Contents Example Title PDF PRIME MOTORS, ELECTRIC MOTORS 1 Traction motor for electric standard-gauge locomotives . . . . . . . . . . . . . . . . . . . . . . 2/8 2 Traction motor for electric commuter trains . . . . . . . . . . . . . . . . . . 2/8 3 Three-phase current standard motor . . . 2/8 4 Electric motor for domestic appliances . . 2/8 5 Drum of a domestic washing machine . . 2/8 6 Vertical-pump motor . . . . . . . . . . . . . . . . 2/8 7 Mine fan motor . . . . . . . . . . . . . . . . . . . . 2/8 POWER ENGINEERING 8 Rotor of a wind energy plant . . . . . . . . . . 2/8 METALWORKING MACHINES Work spindles of machine tools . . . . . . . 2/8 9 Drilling and milling spindle . . . . . . . . . . 2/8 10 NC-lathe main spindle . . . . . . . . . . . . . . 2/8 11 CNC-lathe main spindle . . . . . . . . . . . . . 2/8 12 Plunge drilling spindle . . . . . . . . . . . . . . 2/8 13 High-speed motor milling spindle . . . . . 2/8 14 Motor spindle of a lathe . . . . . . . . . . . . . 2/8 15 Vertical high-speed milling spindle . . . . . 2/8 16 Bore grinding spindle . . . . . . . . . . . . . . . 2/8 17 External cylindrical grinding spindle . . . 2/8 18 Surface grinding spindle . . . . . . . . . . . . . 2/8 Other bearing arrangements 19 Rotary table of a vertical lathe . . . . . . . . . 2/8 20 Tailstock spindle . . . . . . . . . . . . . . . . . . . 2/8 21 Rough-turning lathe for round bars and pipes . . . . . . . . . . . . . . . . . . . . . . . . . 2/8 22 Flywheel of a car body press . . . . . . . . . . 2/8 MACHINERY FOR WORKING AND PROCESSING NON-METALLIC MATERIALS 23 Vertical wood milling spindle . . . . . . . . . 3/8 24 Double-shaft circular saw . . . . . . . . . . . . 3/8 25 Rolls for a plastic calender . . . . . . . . . . . . 3/8 STATIONARY GEARS 26 Infinitely variable gear . . . . . . . . . . . . . . . 3/8 27 Spur gear transmission for a reversing rolling stand . . . . . . . . . . . . . . . . . . . . . . . 3/8 28 Marine reduction gear . . . . . . . . . . . . . . . 3/8 29 Bevel gear – spur gear transmission . . . . . 3/8 30 Double-step spur gear . . . . . . . . . . . . . . . 3/8 31 Worm gear pair . . . . . . . . . . . . . . . . . . . . 3/8 Example Title PDF MOTOR VEHICLES Automotive gearboxes . . . . . . . . . . . . . . 3/8 32 Passenger car transmission . . . . . . . . . . . 3/8 33 Manual gearbox for trucks . . . . . . . . . . . 3/8 Automotive differentials . . . . . . . . . . . . . 3/8 34 Final drive of a passenger car . . . . . . . . . . 3/8 Automotive wheels . . . . . . . . . . . . . . . . . 3/8 35 Driven and steered front wheel of a front drive passenger car . . . . . . . . . . . . . 3/8 36 Driven and non-steered rear wheel of a rear drive passenger car . . . . . . . . . . . . . . 3/8 37 Driven and non-steered rear wheel of a rear drive truck . . . . . . . . . . . . . . . . . . . . 3/8 38 Steering king pin of a truck . . . . . . . . . . . 3/8 39 Shock absorbing strut for the front axle of a car . . . . . . . . . . . . . . . . . . . . . . . 3/8 Other automotive bearing arrangements 40 Water pump for passenger car and truck engines . . . . . . . . . . . . . . . . . . . . . . 3/8 41 Belt tensioner for passenger car engines . 3/8 RAIL VEHICLES Wheelsets 42 Axle box roller bearings of an Intercity train carriage . . . . . . . . . . . . . . . . . . . . . . 4/8 43-44 UIC axle box roller bearings for freight cars . . . . . . . . . . . . . . . . . . . . . . . . 4/8 45 Axle box roller bearings of series 120's three-phase current locomotive . . . 4/8 46 Axle box roller bearings for an ICE driving unit . . . . . . . . . . . . . . . . . . . . . . . 4/8 47 Axle box roller bearings for the Channel tunnel's freight engine, class 92 . . . . . . . 4/8 48 Axle box roller bearings for an underground train . . . . . . . . . . . . . . . . . . 4/8 49 Axle box roller bearings for a light rail vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . 4/8 50 Axle box roller bearings according to A.A.R. standard and modified types . . . . 4/8 51 Kiln trucks for sand lime brick works . . . 4/8 Drives 52 Universal quill drive for threephase current locomotives of series 120 . . . . . . 4/8 53 Suspension bearing arrangement for electric goods train locomotive . . . . . 4/8 54 Spur gear transmission for the underground or subway . . . . . . . . . . . . . 4/8 55 Bevel gear transmission for city trains . . . 4/8 Contents Example Title PDF SHIPBUILDING Rudder shafts . . . . . . . . . . . . . . . . . . . . . 4/8 56-57 Spherical roller bearings as rudder shaft bearings . . . . . . . . . . . . . . . . . . . . . . 4/8 58-59 Spherical roller thrust bearings as rudder carriers . . . . . . . . . . . . . . . . . . . . . 4/8 60 Spade-type rudder . . . . . . . . . . . . . . . . . . 4/8 Ship shafts 61-62 Ship shaft bearings and stern tube bearings . . . . . . . . . . . . . . . . . . . . . . . . . . 4/8 63-64 Ship shaft thrust blocks . . . . . . . . . . . . . . 4/8 PAPER MACHINES . . . . . . . . . . . . . . 5/8 65 Refiners . . . . . . . . . . . . . . . . . . . . . . . . . . 5/8 66 Suction rolls . . . . . . . . . . . . . . . . . . . . . . . 5/8 67 Central press rolls . . . . . . . . . . . . . . . . . . 5/8 68 Dryer rolls . . . . . . . . . . . . . . . . . . . . . . . . 5/8 69 Guide rolls . . . . . . . . . . . . . . . . . . . . . . . . 5/8 70 Calender thermo rolls . . . . . . . . . . . . . . . 5/8 71 Anti-deflection rolls . . . . . . . . . . . . . . . . . 5/8 72 preader rolls . . . . . . . . . . . . . . . . . . . . . . . 5/8 LIFTING AND CONVEYING EQUIPMENT Aerial ropeways, rope sheaves 73 Run wheel of a material ropeway . . . . . . 5/8 74 Rope return sheaves of passenger ropeway . . . . . . . . . . . . . . . . . . . . . . . . . . 5/8 75 Rope sheave (underground mining) . . . . 5/8 76 Rope sheave of a pulley block . . . . . . . . . 5/8 Cranes, lift trucks 77 Crane pillar mounting with a spherical roller thrust bearing . . . . . . . . . . . . . . . . . 5/8 78 Crane pillar mounting with a spherical roller thrust bearing and a spherical roller bearing . . . . . . . . . . . . . . . . . . . . . . 5/8 79 Roller track assembly . . . . . . . . . . . . . . . . 5/8 80 Crane run wheel . . . . . . . . . . . . . . . . . . . 5/8 81 Crane hook . . . . . . . . . . . . . . . . . . . . . . . 5/8 82 Mast guidance bearings of a fork lift truck . . . . . . . . . . . . . . . . . . . . . . 5/8 Belt conveyors 83 Head pulley of a belt conveyor . . . . . . . . 5/8 84 Internal bearings for the tension/ take-up pulley of a belt conveyor . . . . . . 5/8 85 Rigid idlers . . . . . . . . . . . . . . . . . . . . . . . 5/8 86 Idler garland . . . . . . . . . . . . . . . . . . . . . . 5/8 Example Title PDF Excavators and bucket elevators 87 Bucket wheel shaft of a bucket wheel excavator . . . . . . . . . . . . . . . . . . . . . . . . . 5/8 88 Bottom sprocket of a bucket chain dredger . . . . . . . . . . . . . . . . . . . . . . . . . . . 5/8 89 Drive unit of a finished-goods elevator . . 5/8 CONSTRUCTION MACHINERY 90 Driving axle of a construction machine . 6/8 91 Vibrating road roller . . . . . . . . . . . . . . . . 6/8 RAW MATERIAL PROCESSING Crushers and mills 92 Double toggle jaw crusher . . . . . . . . . . . . 6/8 93 Hammer mill . . . . . . . . . . . . . . . . . . . . . . 6/8 94 Double-shaft hammer crusher . . . . . . . . 6/8 95 Ball tube mill . . . . . . . . . . . . . . . . . . . . . . 6/8 96 Support roller of a rotary kiln . . . . . . . . . 6/8 Vibrating machines . . . . . . . . . . . . . . . . . 6/8 97 Two-bearing screen with circle throw . . . 6/8 98 Two-bearing screen with straight-line motion . . . . . . . . . . . . . . . . . . . . . . . . . . . 6/8 99 Four-bearing screen . . . . . . . . . . . . . . . . . 6/8 100 Vibrator motor . . . . . . . . . . . . . . . . . . . . 6/8 STEEL MILL AND ROLLING MILL EQUIPMENT 101-103 Large-capacity converters . . . . . . . . . . . . 6/8 104 Roll bearings of a non-reversing four- high cold rolling stand for aluminium . . 6/8 105 Work rolls for the finishing section of a four-high hot wide strip mill . . . . . . . . . . 6/8 106 Roll mountings of a two-high ingot slab stand or ingot billet stand . . . . . . . . 6/8 107 Combined reduction and cogging wheel gear of a billet mill . . . . . . . . . . . . . 6/8 108 Work rolls of a section mill . . . . . . . . . . . 6/8 109 Two-high rolls of a dressing stand for copper and brass bands . . . . . . . . . . . . . . 6/8 110 Straightening rolls of a rail straightener . 6/8 AGRICULTURAL MACHINERY · FOOD INDUSTRY 111 Disk plough . . . . . . . . . . . . . . . . . . . . . . . 6/8 112 Plane sifter . . . . . . . . . . . . . . . . . . . . . . . . 6/8 Contents Example Title Page PRINTING PRESSES 113 Impression cylinders of a newspaper rotary printing press . . . . . . . . . . . . . . . . 7/8 114 Blanket cylinder of a sheet-fed offset press . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7/8 PUMPS 115 Centrifugal pump . . . . . . . . . . . . . . . . . . 7/8 116-117 Axial piston machines . . . . . . . . . . . . . . . 7/8 VENTILATORS, COMPRESSORS, FANS 118 Exhauster . . . . . . . . . . . . . . . . . . . . . . . . . 7/8 119 Hot gas fan . . . . . . . . . . . . . . . . . . . . . . . 7/8 120 Fresh air blower . . . . . . . . . . . . . . . . . . . . 7/8 PRECISION MECHANICS, OPTICS, ANTENNAS 121 Optical telescope . . . . . . . . . . . . . . . . . . 7/8 Radiotelescope . . . . . . . . . . . . . . . . . . . . 7/8 122 Elevation axle . . . . . . . . . . . . . . . . . . . . . 7/8 123 Azimuth axis (track roller and king pin bearings) . . . . . . . . . . . . . . . . . . . . . . 7/8 124 Data wheel . . . . . . . . . . . . . . . . . . . . . . . . 7/8 GLOSSARY . . . . . . . . . . . . . . . . . . . . . . 8/8 The Design of Rolling Bearing Mountings PDF 2/8: Prime motors, electric motors Power engineering Metalworking machines Rolling Bearings FAG OEM und Handel AG Publ. No. WL 00 200/5 EA The Design of Rolling Bearing Mountings Design Examples covering Machines, Vehicles and Equipment Publ. No. WL 00 200/5 EA FAG OEM und Handel AG A company of the FAG Kugelfischer Group Postfach 1260 · D-97419 Schweinfurt Telephone (0 97 21) 91-0 · Telefax (0 97 21) 91 34 35 Telex 67345-0 fag d Preface This publication presents design examples covering various machines, vehicles and equipment having one thing in common: rolling bearings. For this reason the brief texts concentrate on the roll- ing bearing aspects of the applications. The operation of the machine allows conclusions to be drawn about the operating conditions which dictate the bearing type and design, the size and arrangement, fits, lubri- cation and sealing. Important rolling bearing engineering terms are print- ed in italics. At the end of this publication they are summarized and explained in a glossary of terms, some supplemented by illustrations. Contents Example Title PDF PRIME MOTORS, ELECTRIC MOTORS 1 Traction motor for electric standard-gauge locomotives . . . . . . . . . . . . . . . . . . . . . . 2/8 2 Traction motor for electric commuter trains . . . . . . . . . . . . . . . . . . 2/8 3 Three-phase current standard motor . . . 2/8 4 Electric motor for domestic appliances . . 2/8 5 Drum of a domestic washing machine . . 2/8 6 Vertical-pump motor . . . . . . . . . . . . . . . . 2/8 7 Mine fan motor . . . . . . . . . . . . . . . . . . . . 2/8 POWER ENGINEERING 8 Rotor of a wind energy plant . . . . . . . . . . 2/8 METALWORKING MACHINES Work spindles of machine tools . . . . . . . 2/8 9 Drilling and milling spindle . . . . . . . . . . 2/8 10 NC-lathe main spindle . . . . . . . . . . . . . . 2/8 11 CNC-lathe main spindle . . . . . . . . . . . . . 2/8 12 Plunge drilling spindle . . . . . . . . . . . . . . 2/8 13 High-speed motor milling spindle . . . . . 2/8 14 Motor spindle of a lathe . . . . . . . . . . . . . 2/8 15 Vertical high-speed milling spindle . . . . . 2/8 16 Bore grinding spindle . . . . . . . . . . . . . . . 2/8 17 External cylindrical grinding spindle . . . 2/8 18 Surface grinding spindle . . . . . . . . . . . . . 2/8 Other bearing arrangements 19 Rotary table of a vertical lathe . . . . . . . . . 2/8 20 Tailstock spindle . . . . . . . . . . . . . . . . . . . 2/8 21 Rough-turning lathe for round bars and pipes . . . . . . . . . . . . . . . . . . . . . . . . . 2/8 22 Flywheel of a car body press . . . . . . . . . . 2/8 [...]... n5; end cap to M6 The bearings are fitted tightly on the shaft due to the high load, which is sometimes of the shock type This reduces the danger of fretting corrosion, particularly at the drive end Bearing clearance Due to the tight fits, the inner ring of the bearing is expanded and the outer ring with the roller-and-cage assembly is contracted Thus the radial clearance of the bearing is reduced... parts, tight fits of the rings, and a light preload of the cylindrical roller bearings The inner rings are pushed along the tapered bearing seat until the roller-and-cage assembly runs under a light preload (5 µm) Surface finish and dimensional accuracy of the workpiece mainly depend on the axial rigidity of the spindle headstock and of the rotary table Therefore, the rigidity of the thrust bearings is especially... with the index of dynamic stressing fL > 6 Bearing selection The axial load of 130 kN is made up of the weight of the rotor and the two variable top and bottom fan impellers as well as the thrust of these fan impellers They are supported by the upper thrust bearing The radial loads on vertical motors are only guiding loads They are very small and generally result from the unbalanced magnetic pull and the. .. sleeves of identical lengths With a good bearing distance, the axial and radial heat expansions of the work spindle compensate each other so that the bearing preload remains unchanged under any operating condition Bearing dimensioning Lubrication, sealing The size of the bearings is primarily based on the spindle rigidity required, i e on the largest possible spindle diameter The fatigue life of the bearings... operation of the bearings is achieved by a spring washer lightly preloading the bearings in the axial direction The bearing seats on the shaft and in the end cap bores must be well aligned To allow the spring washer to adjust the bearings axially, the outer rings have slide fits in the end caps A deep groove ball bearing FAG 626.2ZR is provided on the collector side, and an FAG 609.2ZR.L91 on the other... downwards; type V1 Bearing selection The selection of the bearings is primarily based on the main thrust, which is directed downwards It is made up of the weight of the rotor and and pump impeller (4 kN), the pump thrust (9 kN) and the spring preload (1 kN) When the motor idles the pump thrust may be reversed so that the bearings have, briefly, to accommodate an upward axial load of 4 kN, as well The radial... difference between the inner ring and the outer ring of the bearing, and the ring expansion which makes itself felt by the centrifugal force resulting from the high speed In a rigid bearing arrangement, this would considerably increase the preload Due to the spring preload, both these influences are easily compensated for As a result, the contact pressure in the rolling contact area of the bearing is relatively... dismounting of the bearings, they are fastened on the shaft by means of hydraulic adapter sleeves FAG H31/670HGJS and FAG H30/900HGS Adapter sleeves also allow easier adjustment of the required radial clearance The bearings are supported by one-piece plummer block housing of designs SUB (locating bearing) and SUC (floating bearing) The housings are made of cast steel and were checked by means of the finite-element... primarily based on the spindle rigidity required, i.e on the spindle diameter The fatigue life of the bearings is taken into account for dimensioning but it does not play a dominating role in practice The bearings are greased for life with the FAG rolling bearing grease Arcanol L74V Approximately 35% of the spindle bearing cavity and approximately 20% of the cylindrical -roller bearing cavity is filled... hardly ever occurs; the bearings reach the required life of between 500 and 2,000 hours Bearing selection Quiet running is the prime requirement for domestic appliance motors The noise level of a motor is influenced by bearing quality (form and running accuracy), bearing clearance and the finish of the shaft and end cap bore Today, the quality of standard bearings already adequately meets the common noise . The Design of Rolling Bearing Mountings PDF 1/8: Contents Rolling Bearings FAG OEM und Handel AG Publ. No. WL 00 200/5 EA The Design of Rolling Bearing. operation of the bearings is achieved by a spring washer lightly preloading the bearings in the axial direction. The bearing seats on the shaft and in the end