11
ASSEMBLY AND COMMISSIONING RECOMMENDATIONS
LSHRM - FLSHRM - PLSHRM - Permanent Magnet Assisted Reluctance motors
5411 en - 2019.04 / b
The motors are balanced with a half-key as standard
unless otherwise indicated. The coupling balancing will
therefore need to be adapted to motor balancing, and
the coupling will need to be adapted to the length of the
shaft key; alternatively any visible parts protruding from
the key can be machined off. A suitable key can be used.
Failure to follow these recommendations
could lead to premature wear of the
bearings and invalidate the warranty.
Coupling adjusted
to the length of the key
Machining of the visible,
projecting parts of the key
CORRECT ASSEMBLY
INCORRECT ASSEMBLY
Protruding, non-machined key
Coupling not adjusted to the length of the key
Part to be machined
If a motor is started up without a coupling
device having been fitted, carefully
immobilize the key in its housing.
Beware of backdriving when the motor is switched off.
Appropriate precautions must be taken:
- for pumps, install a non-return valve.
- for mechanical devices, install a backstop or a holding
brake.
- etc.
• Tolerances and adjustments
The standard tolerances are applicable to the mecha-
nical characteristics given in our catalogues. They com-
ply fully with the requirements of IEC standard 72-1.
- Adhere strictly to the instructions provided by the trans-
mission device supplier.
- Avoid impacts which could damage the bearings.
Use a wrench and grease the tapped hole of the shaft
extension with a special lubricant (e.g. molykote grease)
to make it easier to fit the coupling.
The hub of the transmission device must be:
- fully in contact with the shoulder of the shaft or, if this is
missing, hard up against the metal stop ring (do not
crush the seal);
- longer than the shaft extension (by 2 to 3 mm) so that
it can be tightened using a screw and washer. If it is not
longer, a spacer ring must be inserted without cutting
the key (if this ring is large, it must be balanced).
Bearing against
the shaft shoulder
Bearing against
the stop ring
Inertia flywheels must not be mounted directly
onto the
shaft extension, but installed between end shields and
connected by a coupling sleeve.
• Mounting a face mounted motor
Mounting face mounted motors IM B14 (IM 3601) and
IM B34 (IM 2101).
Max. screw insertion length when mounting face
mounted motors IM B34 and IM B14.
Max. insertion
(mm)
LSHRM 132 FT165
11
LSHRM 160 FT215
15
• Direct connection to the machine
When the rotating device (pump or fan turbine) is
mounted directly on the motor shaft end, check that this
device is perfectly balanced and that the radial force and
the axial thrust are within the limits indicated in the
catalogue for bearing strength.
• Direct connection using a coupling sleeve
The coupling sleeve must be selected based on the
torque rating to be transmitted and the safety factor
depending on the starting conditions for the electric
motor.
