Elastomeric Couplings - Type GE0 pages

GE Series Elastomeric Couplings

Factor f1-ambient temperature

For GE Series Couplings design torque may need correcting for elevated
ambient temperature or frequent starting before comparison with the coupling
nominal torque rating.
Coupling nominal torque

Temperature ˚C

TnTd.f1.f2
Tn0.5Ts.f1.f2

f1 = temperature factor
f2 = start-up factor
Ts = starting/max torque of motor
For applications with frequent torque changes or reversal, check capacityTr
Reversal Torque TrTv.f1. Tv = actual torque variation

-30

Factor f1

1.0

31-40 41-60 61-80
1.2

1.4

81+

1.6

1.8

Factor f2-start-up
Start/hr

100

200

400

800

Factor f2

1.0

1.2

1.4

1.6

GE Plain Bore Couplings - Capacities and Dimensions (mm)
Technical Data

Max.
Speed
rpm

GE19A-24B
GE24A-32B
GE28A-38B
GE38A-45B
GE42A-55B
GE48A-60B
GE55A-70B
GE65A-75B
GE75A-90B
GE90A-100B

Nominal(3) Reversal
Torque
Torque
Tn Nm
Tn Nm

14000
10600
8500
7100
6000
5600
4750
4250
3550
2800

10
35
95
190
265
310
375
425
975
2400

2.6
9
25
49
69
81
98
111
254
624

Torsional Stiffness kNm/Rad
1.0 Tn

Maximum Misalignment

0.75 Tn

0.25 Tn

Angular
deg.

Radial
mm

Axial
mm

0.57
1.82
4.31
8.30
14.11
16.59
18.25
23.39
56.41
96.26

0.68
2.19
5.20
10.00
17.00
20.00
21.99
28.20
67.99
110.00

0.5 Tn
0.44
1.40
3.32
6.39
10.68
12.77
14.05
18.01
43.44
70.27

0.28
0.90
2.12
4.08
6.94
8.16
8.98
11.51
27.75
44.89

1.2˚
0.9˚
0.9˚
1.0˚
1.0˚
1.1˚
1.1˚
1.2˚
1.2˚
1.2˚

0.2
0.2
0.25
0.28
0.32
0.36
0.38
0.42
0.48
0.50

1.2
1.4
1.5
1.8
2.0
2.1
2.2
2.6
3.0
3.4

Performance ratings for Aluminium Hubs are identical to equivalent steel size.

Dimensions
Coupling (1)
Size

Bore Diameters - mm
Hub Type A
Hub Type B
Min. Max(2) Min. Max(2)

GE19A-24B
GE24A-32B
GE28A-38B
GE38A-45B
GE42A-55B
GE48A-60B
GE55A-70B
GE65A-75B
GE75A-90B
GE90A-100B

38

19
24
28
38
42
48
55
65
75
90

38

GE19AA-24BA
GE24AA-32BA
GE28AA-38BA
GE38AA-45BA

6
7
8

19
24
28
38

12
14
16
20

A

B

C

D

24
32
38
45
55
60
70
75
90
100

30
40
48
66
75
85
98
115
135
160

40
55
65
78
94
104
118
134
158
180

40
55
65
80
95
105
120
135
160
200

25
30
35
45
50
56
65
75
85
100

24
28
38
45

32
40
48
66

40
55
65
78

40
55
65
80

25
30
35
45

Approx. Coupling Wt. kg(5)

Coupling Inertia kg cm(5)

F

G

H

L

16
18
20
24
26
28
30
35
40
45

19
24
27.5
36.5
40
45
52
61
69
81

12
14
15
18
20
21
22
26
30
34

18
27
30
38
46
51
60
68
80
100

66
78
90
114
126
140
160
185
210
245

0.27
0.61
0.97
2.08
3.21
4.41
6.64
10.13
16.03
28.45

0.30
0.78
1.29
2.37
3.61
4.97
7.37
10.89
17.73
30.25

0.33
0.96
1.61
2.66
4.01
5.53
8.11
11.65
19.43
32.10

0.7
2.5
6
17
40
60
120
250
540
1400

0.8
3.0
7
20
50
80
160
310
680
1590

0.8
3.5
8
23
60
100
200
370
820
1780

16
18
20
24

19
24
27.5
36.5

12
14
15
18

18
27
30
38

66
78
90
114

0.12
0.24
0.39
0.82

0.13
0.26
0.46
0.89

0.14
0.28
0.53
0.95

0.3
0.8
2.0
7.0

0.4
0.9
2.4
7.5

0.4
1.0
2.8
8.0

E(4)

Type A-A Type A-B Type B-B Type A-A Type A-B Type B-B

(1) Coupling ref is for mixed hubs.
(4) With coupling correctly positioned on shafts.
(5) Weights and Inertias for couplings on max. bore.
(2) With Standard keyway.
(3) Angular deflection at Nominal Torque Tn is 3˚ and Max Torque Tm is 5˚ Max Torque is double Nominal Torque.
All Couplings can be supplied with hubs finished bored, keyseated and with set screws on 48 hour re-work service.
Also sizes 28A- 38B through to GE75A - 90B are available with Taper Bush fitting.

3
INDEX

BACK

NEXT

Email: sales@crossmorse.com

Coupling (1)
Size

Fax: +44 121 325 1079

Coupling Capacities and Selection

Te l : + 4 4 1 2 1 3 6 0 0 1 5 5

The GE series of flexible couplings consist of two machined metal hubs
connected by an elastomeric gear ring. The couplings are equally suited
to horizontal or vertical shaft applications, providing positive power transmission
and absorbing torsional, vibration and impact loads. The standard elastomeric ring
is a black thermoplastic rubber of 94 shore A hardness selected for its resistance to
wear, oil, chemicals, ozone and hydrolysis, which makes it suitable for tropical
climates. Standard couplings can work in environments with temperature range
–40˚C to +125˚C and withstand +150˚C for short periods. The teeth of the gear
ring are of involute form to prevent high stress concentrations in reduced surfaces,
and crowned to avoid edge pressure on the teeth. The circular apertures on each
hub are precision-machined to provide positive torque transmission with
minimum backlash.
For increased torsional rigidity two alternative gear rings are available, both of 96 Shore a hardness; a red thermoplastic rubber
element, and a yellow polyurethane element recommended for the Aluminium Hubs.
GE Plain Bore Couplings are manufactured in two materials, Grade 250 Cast Iron for normal industrial applications, and
aluminium where weight and inertias must be kept to a minimum. Two styles of hub are offered: ‘ ’ style with hub diameter
A
reduced below flange diameter to minimise weight; and ‘B’ style with hub diameter basically the same as the flange diameter to
accommodate larger diameter shafts of electric motors and gear units. Different styles of hub can be mixed to accommodate
differing shaft requirements. The hubs are identified by the maximum bore which can be accommodated, and hub style, i.e.
GE24A is an ‘ ’ type hub capable of max. bore size 24mm. Hubs of different styles can be combined in a coupling, and identified as
A
in examples below.
GE24A-24A - Has two ‘ ’ type hubs.
A
GE24A-32B - Has one ‘ ’ and one ‘B’ type hub.
A
For aluminium couplings numbers are the same with addition of a suffix ‘ ’ e.g. GE24AA-32BA
A