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

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

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

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 ·

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

and pipes . . . . . . . . . . . . . . . . . . . . . . . . . 2/8
22 Flywheel of a car body press . . . . . . . . . . 2/8
1
Traction motor for electric standard-gauge locomotives
Operating data
Three-phase current motor supplied by frequency
converter.
Nominal output 1,400 kW, maximum speed
4,300 min
–1
(maximum driving speed for transmis-
sions with standard gear ratios is 200 km/h). One-end
drive with herringbone gear pinion.
Bearing selection, dimensioning
Collective loads which cover representative load cases
for the motor torque, speeds, and percentages of time
for the operating conditions in question, are used to
determine bearing stressing.
Load case M
d
nq
N m min
–1
%
1 6,720 1,056 2
2 2,240 1,690 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

hna
= a
1
· a
23
· L
h
[h], taking into account the
operating viscosity ␯ of the transmission oil at 120 °C,
the rated viscosity ␯
1
as well as the factors K
1
and K
2
.
The basic a
23II
factor is between 0.8 and 3. The cleanli-
ness factor s is assumed to be 1. Then, L
hna
is obtained
using the formula:
L
hna
=
100
q
1
+

polyamide, rolling element riding
C5 radial clearance larger than C4
F1 FAG manufacturing and inspection
specification for cylindrical roller bearings in
traction motors which considers, among
others, the requirements according to DIN
43283 "Cylindrical roller bearings for
electric traction".
P64 tolerance class P6, radial clearance C4
Machining tolerances
Drive end: shaft r5; end cap to M6
Opposite end: shaft 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 after mounting. It is further re-
duced during operation as the operating temperature
of the inner ring is higher than that of the outer ring.
For this reason bearings with an increased radial clear-
ance (C4...C5) are mounted.
Lubrication, sealing
The drive-end bearing is lubricated, due to the high
speeds, with transmission oil ISO VG 320 with EP
additives. No sealing is required between pinion and
bearing so that a shorter cantilever can be used, thus