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 [...]... percentages of time for the operating conditions in question, are used to determine bearing stressing Load case Md Nm n min 1 q % 1 2 3 4 5 6,720 2,240 1, 920 3,200 2,240 1, 056 1, 690 2,324 2,746 4,225 2 34 18 42 6 The collective load is the basis for determining the average speeds (2,387 min 1) and the average driving speed (11 1 km/h) For each of the load cases the tooth load acting on the pinion and the reaction... 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 after mounting It is further reduced during operation as the operating temperature of the inner ring is higher than that of the outer... that the nominal mileage is reached and that, due to the high speed, the drive-end bearing is not too large With the bearings selected the theoretical mileage of 2.5 million kilometers required by the customer can be reached A cylindrical roller bearing FAG NU322E.TVP2.C5.F1 serves as floating bearing at the drive end; an FAG 566 513 with an angle ring HJ 318 E.F1 serves as the locating bearing The cylindrical... load case using the formula Lhna = a1 · a23 · Lh [h], taking into account the operating viscosity of the transmission oil at 12 0 °C, the rated viscosity 1 as well as the factors K1 and K2 The basic a23II factor is between 0.8 and 3 The cleanliness factor s is assumed to be 1 Then, Lhna is obtained using the formula: 10 0 Lhna = q1 q2 q + + 3 + Lhna3 Lhna1 Lhna2 When selecting the bearing it should... 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 requirements Zero-clearance 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. .. representing the motor torque versus the driving time The cubic mean of the motor torque and an average speed, which is also determined from the operating graph, form the basis for the rolling bearing analysis The mean torque is about 90 % of the torque at constant power The bearing loads are calculated as for traction motors for standard-gauge locomotives (example 1) They are made up of the reaction... case a bearing of series 62 was selected for both bearing locations, i.e an FAG 6206.2ZR.C3.L207 They guide the rotor shaft both at the drive side and at the ventilating side The spring at the drive side provides clearance-free adjustment of the bearings and accommodates opposing axial loads on the rotor shaft By adjusting the deep groove ball bearings to zero clearance the adverse influence of bearing. .. 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 loads acting on the bearings are not exactly known They are made up by the unbalanced magnetic pull and potential unbalanced loads from the. .. the angular contact ball bearing is subjected to a minimum axial load by means of springs On the pump impeller side a cylindrical roller bearing FAG NU1020M1.C3 acts as the floating bearing As it accommodates the unbalanced loads from the pump impeller both the inner and the outer ring are fitted tightly The cylindrical roller bearing design depends on the shaft diameter of 10 0 mm, which in turn is... from the usual approach As not even the motor manufacturer knows the amount of load at the shaft end, the permissible radial loading is indicated in the motor catalogues To determine the radial load carrying capacity, the drive-side deep groove ball bearing is calculated The calculation is based on an attainable life Lhna of 20,000 h and a basic a23II value of 1. 5 In addition, the rotor weight, the . 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. 34 3 1, 920 2,324 18 4 3,200 2,746 42 5 2,240 4,225 6 The collective load is the basis for determining the average speeds (2,387 min 1 ) and the average driving speed (11 1 km/h). For each of the. 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