37
UTD.123.2019-10.00_EN
When
assembling
and
disassembling
the gear reducers and gearmotors with hollow low speed shaft and
groove for retaining ring – both with keyway and with shrink disc - proceed as per fig. 7.9.1 and 7.9.2,
respectively (excluding helical gearmotors MR 3I 100 with motor size 112 and MR 3I 125 with motor size 132;
consult us).
For helical gearmotors MR 3I 64 ... 81 first insert the washer with screw and the retaining ring into gear
reducer hollow shaft (on motor opposite side); then mount the gear reducer on machine shaft end.
7.9 - Gear reducer assembly and disassembly
Fig. 7.9.1
Fig. 7.9.2
Hole
Parallel key
Keyway
D
b
×
h
×
l*
b
t
t
1
Ø H7
h9
h11
H9 hub
N9 shaft
shaft
hub
19
6
×
6
×
50
2)
6
3.5
21,8
3)
24
8
×
7
×
63
2)
8
4
27,3
3)
28
8
×
7
×
63
8
4
31.2
30
8
×
7
×
63
8
4,5
1)
32,7
1)
32
10
×
8
×
70
10
5
35.3
38
10
×
8
×
90
10
5,5
1)
40,7
1)4)
40
12
×
8
×
90
12
5
1)
43.3
48
14
×
9
×
110
14
5
51.8
60
18
×
11
×
140
18
7
64.4
70
20
×
12
×
180
20
8
1)
74,3
1)
75
20
×
12
×
180
20
7.5
79.9
80
22
×
14
×
200
22
9
85.4
90
25
×
14
×
200
25
9
95.4
100
28
×
16
×
250
28
10
106.4
110
28
×
16
×
250
28
10
116.4
125
32
×
18
×
320
32
11
132.4
140
36
×
20
×
320
36
12
148.4
160
40
×
22
×
400
40
14
1)
168,3
1)
180
45
×
25
×
400
45
15
190.4
200
45
×
25
×
600
45
15
210.4
220
50
×
28
×
600
50
17
231.4
250
56
×
32
×
750
56
20
262.4
280
63
×
32
×
750
63
20
292.4
310
70
×
36
×
840
70
22
324.4
* Recommended length
1) Values not to standard.
2) For worm gear reducer dimension l* = 36 and 45 respectively.
3) For worm gear reducers dimension t
1
= 21,7 e 27,2 respectively.
4) For worm gear reducer dimension t
1
= 41,3
Tab. 7.8.1 - Hollow low speed shaft
Tab. 7.7.1
Содержание Rossi A Series
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