Thumb Coupling

I. GENERAL INFORMATION ABOUT THE ELASTIC COUPLINGS AND EXPLANATION HOW TO WORK WITH THEM

1. The normal couplings NC and the light couplings LC are designed to generate turning moment from 27 to 7160 Nm. The turning moment is generated through an elastic element, which is rubber rings in a package put upon thumbs. The package is assembled in the holes of the half coupling with a radial backlash and thus the geometry of the knot allows the compensation of radial and angular dislocations.

!. These are the most important parameters when ordering these types of couplings:
( 1) type of the coupling: normal coupling NC or light coupling LC;
(2) Diameters of the holes: d1 and d’1
!. A symbol for normal coupling NC 1 with a cylindrical hole for front fixing to a shaft of d1= 35 mm of disk I and a cylindrical hole of d’1= 32 mm of disk II:
Coupling NC 1 – I Cylindrical Hole for front fixing 35, II Cylindrical Hole 32, Bulgarian State Standard 2441-76

1) The construction and the basic dimensions of the couplings should correspond to the applied sketch and table
 


2) Technical parameters, dimensional and joining sizes of the NC and LC couplings

 

Number of the couplings
Maximum
Turning moment of the coupling N in Nm
Maximum
Frequency of turning
Thumbs
Dimensions in mm
n
revolutions
per minute
rad./ sek
Numbers Z
Assembly
Backlash
, С
В, Not less than
Disk 1
Disk 2
L Not more than
D (h11)
D1 (Boundary dislocations
d1
d2
a
d1
d2
b
Not more than
Not more than
CO 0
27
5600
588
П1
3
1 ÷ 3
20
25
40
12
25
42
22
52
90
60 ± 0,20
CO 1
57
5400
565
П1
3
1 ÷ 4
20
35
55
12
32
55
22
82
105
75 ± 0,20
CO 2
110
4700
492
П1
8
1 ÷ 4
20
45
72
12
42
72
22
112
120
92 ± 0,20
CH 1
130
4750
497
П2
4
1 ÷ 5
35
35
55
16
32
55
35
82
120
82 ± 0,20
CO 3
170
3900
408
П1
10
1 ÷ 4
20
52
85
12
48
82
22
112
145
115 ± 0,25
CH 2
240
4000
418
П2
6
1 ÷ 5
35
45
72
16
42
72
35
82
140
100 ± 0,20
CO 4
310
3300
346
П2
6
1 ÷ 5
32
65
105
16
60
105
35
142
170
132 ± 0,25
CH 3
450
3350
350
П3
6
2 ÷ 6
42
52
85
22
48
82
45
112
170
120 ± 0,20
CO 5
620
2800
293
П2
10
1 ÷ 5
32
80
130
16
70
130
35
142
200
160 ± 0,25
CH 4
700
3000
312
П3
8
2 ÷ 6
42
65
105
22
60
102
45
142
190
140 ± 0,20
CH 5
1100
2650
278
П3
10
2 ÷ 6
42
80
130
22
70
130
45
142
220
170 ± 0,20
CO 6
1230
2350
246
П3
10
1 ÷ 6
42
95
150
22
80
145
45
172
240
190 ± 0,25
CO 7
1860
1950
206
П3
12
1 ÷ 6
42
115
185
22
100
185
45
212
290
240 ± 0,25
CH 6
2000
2240
235
П4
10
2 ÷ 8
52
95
150
28
80
145
55
172
260
195 ± 0,20
CO 8
3610
1600
168
П4
12
2 ÷ 8
52
145
230
28
120
220
55
212
350
285 ± 0,25
CH 7
4000
1700
178
П5
10
2 ÷ 10
65
115
185
36
100
185
70
212
330
245 ± 0,20
CO 9
7160
1300
136
П5
12
2 ÷ 10
65
180
290
36
150
270
70
255
440
355 ± 0,25

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