SIEMENS
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Siemens D 83.1 · 2016
1
Introduction
General technical specifications
Bearings
■
Overview
The motors are equipped with deep groove ball bearings at
the drive end (DE) and the non-drive end (NDE). For special
versions with reinforced bearings, a cylindrical roller bearing is
fitted at the DE in some cases.
To fix the rotor in the axial direction, a bearing must be designed
as a so-called located bearing. To prevent expansion of the shaft
in a warm motor in the direction of the driven machine, the
located bearing is installed at the drive end. This does not apply
to motors with reinforced bearings (roller bearings).
In accordance with the type of construction, the located bearing
must be mounted on the NDE fan end. In LOHER VARIO motors
of the 1PS0 and 1PS1 type series for vertical installation, the
located bearing is also mounted at NDE.
The assignment and designation of bearings are shown in the
tables under the heading “Selection of roller bearings.”
Bearing shipping brace
Cylindrical roller bearings are sensitive to shock at standstill.
This can occur during transportation, or it can be caused after
installation by adjacent machines. This results in longitudinal
grooves on the inner ring of the roller bearing. To prevent this, all
motors with roller bearings are equipped with a special shipping
brace. The rotor shaft is totally blocked by tightening several
hexagon bolts. This prevents vibration on the moving surface of
the bearing from being transferred.
During commissioning, the bolts tightened with locknuts must be
slackened by several turns and then retightened. This releases
the shaft so that it can rotate freely in the bearings.
Example illustration
Standard bearings
Selection of roller bearings
Continued on next page.
G_D083_XX_00032
Frame size
No. of poles
Drive end (DE) bearing
Non-drive end (NDE) bearing
Type of construction IM B3,
IM B5
V types of construction
Type of construction IM B3,
IM B5
V types of construction
LOHER CHEMSTAR 1PS0 and 1PS1 motors
90
All
6205-2Z C3
6205-2Z C3
6205-2Z C3
6205-2Z C3
100
All
6306-2Z C3
6306-2Z C3
6306-2Z C3
6306-2Z C3
112
All
6306-2Z C3
6306-2Z C3
6306-2Z C3
6306-2Z C3
132
All
6308-2Z C3
6308-2Z C3
6308-2Z C3
6308-2Z C3
160
All
6310-2Z C3
6310-2Z C3
6310-2Z C3
6310-2Z C3
180
All
6311-Z C3
6311-Z C3
6311-Z C3
6311-Z C3
200
All
6312-Z C3
6312-Z C3
6312-Z C3
6312-Z C3
225
All
6313-Z C3
6313-Z C3
6313-Z C3
6313-Z C3
250
All
6314-Z C3
6314-Z C3
6314-Z C3
6314-Z C3
280
2
6314-Z C3
6314-Z C3
6314-Z C3
6314-Z C3
280
4
6316-Z C3
6316-Z C3
6316-Z C3
6316-Z C3
315
2
6316 C3
6316 C3
1)
6316 C3
6316 C3
315
4
6219 C3
6219 C3
6219 C3
6219 C3
355
2
6316 C3
6316 C3
1)
6316 C3
6316 C3
355
4
6320 C3
6320 C3
6320 C3
6320 C3
LOHER VARIO 1PS0 and 1PS1 motors
355
2
6316 C3
6316 C3
6316 C3
7316 B
1)
355
4
6320 C3
6320 C3
6320 C3
7320 B
400
2
6317 C3
6317 C3
1)
6317 C3
7317 B
1)
400
4
6322 C3
6322 C3
6322 C3
7322 B
450
2
6318 C3
1)
2)
6318 C3
1)
2)
450
4
6324 C3
6324 C3
6324 C3
7324 B
500
2
2)
2)
2)
2)
500
4
6326 C3
6326 C3
6326 C3
7326 B
1)
For 50 Hz operation only, for 60 Hz with C4 bearings.
2)
On request, sleeve bearings may be necessary.
© Siemens AG 2016