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Installation, operation and maintenance instructions
High voltage flameproof motors for explosive atmosphere
AMD Rg 355-400-450-500
Aligning with driven equipment – Horizontal and vertical machines
DOWEL PINS INSERTION.
When the motor design provides the dowels pins
between the frame and the basement, the pins must
be positioned and fixed. It is also good practice, in
every case, to fix the axial and lateral position of the
motor with jig locators. The dowel pins insertion shall
be done after the positive result of the alignment
operation and the check at "warm" condition, after the
motor and the driven machine have reached their
working steady state temperature.
Radial misalignment
a
, b
, c
, and d
1
1
1
entered in the formulas to obtain the values of radial misalignment (Table 1, Fig. 1).
Table 1
Measuring location
Vertical
Top
Bottom
Difference
Half difference=
misalignment
+
Left-hand coupling is higher than the right-h. one
-
Left-hand coupling is lower than the right-h. one
Lateral
Right
Left
Difference
Half difference=
Misalignment
+
Left-h. coupl. displaced to right of right-h. coupl
-
Left-h. coupl. displaced to left of right-h. coupl.
Check for measuring
error
Radial misalignment of the two coupling halves must be read in the 4 position each of 90° at same distance.
Maximum permissible radial misalignment (vertical and lateral misalignment)
Rigid coupling .................................................................... .. r = 0,02 mm
Gear coupling ........................................................................ r = 0,05 mm
Flexible coupling (e.g. rubber-bushed coupling)......................... r = 0,10 mm
, are readings from the dial indicator R at the locations a = top, b = bottom, c = right, d = left. The readings are
1
1st
2nd
Measurement.
Measuremt
a 1
a 2
b 1
b 2
a 1 -b 1
a 2 -b 2
a
b
a
b
1
1
2
2
2
c 1
c 2
d 1
d 2
c 1 -d 1
c 2 -d 2
c
d
c
d
1
1
2
2
2
a
b
a
b
1
1
2
2
1
c
d
c
d
1
1
2
2
BELT DRIVE
Motors with belt drives are always equipped with
cylindrical roller bearing at the D end.
Do not exceed the design radial force indicated by the
specific technical documentation.
Make sure that the driving and the driven pulleys are
correctly aligned.
Example - measures
in hundredth of mm
25
28
31
28
-6
0
2
-3
0
Left-hand coupling
raised by 0,03 mm
38
28
18
28
20
0
2
10
0
Left-hand coupling
Moved 0,1 mm to left
25
31
28
28
1
38
18
28
28
r
Sheet No.
3AAM101032 E
Rev. B
01.2023
Page. 2 of 3
top
direction of
view
right-hand
left-hand
coupling
coupling
bottom
right
direction of
view
right-hand
left-hand
coupling
coupling
bottom
left
Fig 1
Schematic for Table 1
Issued by: MOLM
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