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Checking
Any bearing insulation is fitted as shown on the plates and labels
The CABLES and insulating parts and components are in good condition
and there is no evidence of discoloring
(*) You can perform these checks while the motor is at standstill or, if required, while running.
NOTICE
Machine damage
When carrying out the inspection, if you detect any impermissible deviations from the normal
state, you must rectify them immediately. They may otherwise cause damage to the machine.
9.1.4
Servicing the roller bearings
When inspecting rolling-contact bearings, it is generally not necessary to dismantle the
machines. The motor only has to be dismantled if the bearings are to be replaced.
9.1.5
Bolt grade for roller bearings
Check that all the bolts for attaching the bearing shields, bearing cover, gland plates, and
terminal boxes are present and properly tightened. Replace damaged bolts with identical bolts
of a perfect quality.
Depending on the ambient temperature, only bolts with the bolt grade according to the following
table are permissible for motors without heating.
Table 9-3
Bolt grade BG071 to BG315
Type/size
071, 080, 090, 100, 112, 132,
160, 200, 225, 250, 280, 315
355
SIMOTICS XP 1MD4/1MD5
Operating Instructions 05/2015
Bolt grade for ambient temperature T
≥ -20 °C
Standard
Stainless
steel bolts
8.8
A4-70
8.8
A4-80
Maintenance
9.1 Inspection and maintenance
When the
At stand‐
motor is
still
running
u
Standard
A4-70
--
X
X
79
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