Download product sheet Type LER

Bearing Elements
Rectangular profile/profiled raceway
Type LER
New
8
9
10
10
11
12
12
12
13
13
14
14
14
15
15
15
15
1
1
1
2
2
3
3
4
5
6
7
7
9
10
11
12
13
Ø D+T
KKØ
Ø d+T
1.4
1.6
0.2
0.2
0.2
0.2
0.3
0.3
0.3
0.4
0.4
0.4
0.4
0.5
0.5
0.5
0.5
0.5
0.7
x
8.6
10
10
11
12
13
13
14
14
15
15
16
16
16
17
17
18
18
Adjustment surface
6
R
3
m
2.25
x
13
16
20
23
26
30
33
36
40
43
47
50
53
57
60
64
67
Weight
kg
ax
0.1
x
28
34
41
49
56
64
70
77
85
92
99
106
113
121
128
135
142
Stat. moment
kNm
Cr
C0m
3
C0a
LER2-0080
LER2-0100
LER2-0120
LER2-0140
LER2-0160
LER2-0180
LER2-0200
LER2-0220
LER2-0240
LER2-0260
LER2-0280
LER2-0300
LER2-0320
LER2-0340
LER2-0360
LER2-0380
LER2-0400
Load rating
kN
C0r
Ca
N 8.95 H7
KKØ
mm
x
LER2
M 7.45
LER3
1.6
2.5
x
9.525
12.6
x
3.4
3
3
0.2
0.2
0.3
0.3
0.4
0.4
0.4
0.4
0.5
0.5
0.5
0.5
0.5
0.7
0.7
0.7
0.7
0.7
0.8
1.1
1.3
1.6
1.9
2.0
0.
1
3
5
8
12
16
21
27
33
40
47
56
65
75
85
42
107
120
132
161
191
225
260
299
ax
16
19
21
23
24
26
27
29
30
31
32
33
34
35
35
36
37
38
38
40
41
42
43
45
Ø D+T
KKØ
Ø d+T
Rm
18
22
24
26
28
30
32
33
34
36
37
38
39
40
41
42
43
44
44
46
47
49
50
52
Adjustment surface
x
25
39
52
65
78
92
106
119
132
145
158
172
186
199
212
225
238
253
266
292
318
346
372
398
Weight
kg
x
30
54
82
110
138
166
196
224
252
280
308
336
366
394
422
450
478
506
537
565
621
676
735
791
847
Stat. moment
kNm
Cr
C0m
4
C0a
LER3-0100
LER3-0150
LER3-0200
LER3-0250
LER3-0300
LER3-0350
LER3-0400
LER3-0450
LER3-0500
LER3-0550
LER3-0600
LER3-0650
LER3-0700
LER3-0750
LER3-0800
LER3-0850
LER3-0900
LER3-0950
LER3-1000
LER3-1100
LER3-1200
LER3-1300
LER3-1400
LER3-1500
Load rating
kN
C0r
Ca
N 13 H7
KKØ
mm
M 11
KKØ ≤ 500 mm T = IT6 KKØ > 500 mm T = IT7
Available infinitely variable in all intermediate diameters.
= Ra 3.2
Bearing type
Franke bearing elements in type LER are designed for medium
rotational speeds and accuracies. They run smoothly, possess
high dynamism and require just compact mounting space.
The straight contact surface ensures simple integration in the
mating structure and also a high rigidity. The attractive price
makes this bearing element type LER an economic solution.
Characteristics
Bearing elements of the LER type consist of two inner and two
outer raceways, along with a plastic cage with retained balls.
The race rings are divided at one point to compensate for the
temperature expansion factor. They possess compensatory
properties for demanding forms of stress. LER are generally
mounted free from clearance. The preload can be defined
individually to meet the specific requirement.
See 'Technical information' for the adjustment methods.
Technical details
Material
Ball race rings: 54SiCr6, rolling element: 100Cr6,
cage: PA12
Temperature in use –30 °C to +80 °C, briefly up to +100 °C
Circumferential
speed
max. 5 m/s, without seals max. 10 m/s
Lubricant grease
Klüber ISOFLEX TOPAS NCA52
Lubrication
schedule
See 'Technical information'.
Tolerance details
See 'Technical information'.
Please find additional data on calculation, mounting and setting in
'Technical information'.
Constructive example
Mating structure
The bearing element mounted determines the overall construction's load bearing capacity. Hence the mating con
struction can be made of alternative materials such as steel,
aluminium or plastic. Axial and radial accuracy (see diagram
below) are defined to a substantial extent by the mating
components. These properties can be enhanced by boosting
the accuracy of manufacture.
Please find construction examples, special forms, special
accuracies and other options of individual tailoring on pages
11 – 19.
Rotational resistance
The rotational resistance indicates the preload on the bearing
assembly. It is dependent on the respective type and the race
ring diameter. The values indicated in the diagram are
standard values and can be aligned individually.
Nm
3.0
Type LER2
Nm
160
2.5
Type LER3
Radial and axial runout accuracy
The running accuracies indicated in the diagram are maximum
values and may be improved by restricting the tolerances.
mm
0.10
120
0.08
80
0.06
40
0.04
2.0
1.5
1.0
0
0.0
0
100
200
300
400
0
500
1000
1500
KKØ
mm
0.02
0
100
300
500
700
900
1100
1300
1500
KKØ
mm
31
Bearing Elements
Rectangular profile/profiled raceway
Type LER
New
38
42
45
48
50
52
54
56
58
60
62
63
65
66
68
69
70
73
75
77
80
82
8
13
19
26
34
42
52
63
75
89
103
119
135
152
171
191
212
256
304
358
415
476
2
0.2
0.3
0.3
0.4
0.4
0.4
0.5
0.5
0.5
0.5
0.7
0.7
0.7
0.7
0.8
0.8
0.8
0.8
1.1
1.3
1.6
2.0
3.5
x
17
44
48
52
55
58
60
63
65
67
69
71
73
75
76
78
80
81
84
87
90
92
94
Ø D+T
KKØ
Ø d+T
Adjustment surface
12
5.8
R
m
ax
4
x
82
103
124
147
168
189
210
231
252
274
295
316
337
358
379
402
423
465
507
551
593
635
Weight
kg
M 14
0.
3
x
174
219
264
312
357
401
446
490
535
583
628
672
717
761
806
855
899
988
1077
1170
1259
1348
Stat. moment
kNm
Cr
C0m
5
C0a
LER4-0200
LER4-0250
LER4-0300
LER4-0350
LER4-0400
LER4-0450
LER4-0500
LER4-0550
LER4-0600
LER4-0650
LER4-0700
LER4-0750
LER4-0800
LER4-0850
LER4-0900
LER4-0950
LER4-1000
LER4-1100
LER4-1200
LER4-1300
LER4-1400
LER4-1500
Load rating
kN
C0r
Ca
N 16 H7
KKØ
mm
x
LER4
LER5
32
260
313
371
424
477
530
583
635
693
746
799
852
905
958
1016
1068
1174
1280
1391
1497
1603
1713
1819
1925
122
147
175
199
224
249
274
299
326
351
376
401
426
451
478
503
553
602
655
704
754
806
856
906
48
52
55
58
60
63
75
67
69
71
73
75
76
78
80
81
84
87
90
92
94
97
99
101
42
45
48
50
52
54
65
58
60
62
63
65
66
68
69
70
73
75
77
80
82
84
85
87
15
22
31
40
50
62
56
90
106
123
141
160
181
203
227
251
304
361
425
493
566
645
728
815
Weight
kg
Ø D+T
Adjustment surface
KKØ
Ø d+T
2
0.73
0.85
0.97
1.10
1.22
1.33
1.46
1.58
1.70
1.82
1.95
2.01
2.19
2.31
2.43
2.55
2.68
2.91
3.04
3.34
3.65
3.95
4.25
4.55
3.5
x
17
LER5-0250
LER5-0300
LER5-0350
LER5-0400
LER5-0450
LER5-0500
LER5-0550
LER5-0600
LER5-0650
LER5-0700
LER5-0750
LER5-0800
LER5-0850
LER5-0900
LER5-0950
LER5-1000
LER5-1100
LER5-1200
LER5-1300
LER5-1400
LER5-1500
LER5-1600
LER5-1700
LER5-1800
Stat. moment
kNm
Cr
C0m
12
6
C0a
Load rating
kN
C0r
Ca
N 17.5 H7
KKØ
mm
x
x
KKØ ≤ 500 mm T = IT6 R
m
4.4
5
M 15.75
x
KKØ > 500 mm T = IT7
Available infinitely variable in all intermediate diameters.
ax
0.
3
= Ra 3.2
Bearing type
Franke bearing elements in type LER are designed for medium
rotational speeds and accuracies. They run smoothly, possess
high dynamism and require just compact mounting space.
The straight contact surface ensures simple integration in the
mating structure and also a high rigidity. The attractive price
makes this bearing element type LER an economic solution.
Characteristics
Bearing elements of the LER type consist of two inner and two
outer raceways, along with a plastic cage with retained balls.
The race rings are divided at one point to compensate for the
temperature expansion factor. They possess compensatory
properties for demanding forms of stress. LER are generally
mounted free from clearance. The preload can be defined
individually to meet the specific requirement.
See 'Technical information' for the adjustment methods.
Technical details
Material
Ball race rings: 54SiCr6, rolling element: 100Cr6,
cage: PA12
Temperature in use –30 °C to +80 °C, briefly up to +100 °C
Circumferential
speed
max. 5 m/s, without seals max. 10 m/s
Lubricant grease
Klüber ISOFLEX TOPAS NCA52
Lubrication
schedule
See 'Technical information'.
Tolerance details
See 'Technical information'.
Please find additional data on calculation, mounting and setting in
'Technical information'.
Constructive example
Mating structure
The bearing element mounted determines the overall construction's load bearing capacity. Hence the mating con
struction can be made of alternative materials such as steel,
aluminium or plastic. Axial and radial accuracy (see diagram
below) are defined to a substantial extent by the mating
components. These properties can be enhanced by boosting
the accuracy of manufacture.
Please find construction examples, special forms, special
accuracies and other options of individual tailoring on pages
11 – 19.
Rotational resistance
The rotational resistance indicates the preload on the bearing
assembly. It is dependent on the respective type and the race
ring diameter. The values indicated in the diagram are
standard values and can be aligned individually.
Nm
250
Radial and axial runout accuracy
The running accuracies indicated in the diagram are maximum
values and may be improved by restricting the tolerances.
mm
0.10
200
0.08
150
0.06
100
0.04
50
0
200
400
600
800
1000
1200
1400
1600
1800
KKØ
mm
0.02
0
200
400
600
800
1000
1200
1400
1600 1800
KKØ
mm
33

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