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4.3.3 ALIGNMENT
NOTICE: Great care must be taken in aligning the complete
motor, since misalignment can cause rapid deterioration of
bearings and lead to other mechanical failures due to the stress
produced.
• After final tightening of foundation bolts, motor alignment
should be rechecked as bed plates could move and/or
distort during motor mounting,
• When slide rails are used in conjunction with pulley drives,
the adjusting screw ends should be positioned between
the motor and load at drive shaft end and the other screw
positioned diagonally opposite. This assists with correct
belt installation.
• Proper alignment of the motor and drive equipment
minimizes vibration levels, maximizes bearing life and
extends the overall life of the machinery. Consult the drive
or equipment manufacturer for more information.
• The correct alignment of the motor pulley with the
load pulley is imperative. Both these pulleys must have
matched center distances between grooves and alignment
must be carried out using a suitable metal straight edge
or other recommended tools to ensure parallel offset or
angular displacement of the pulleys with respect to each
other is inside permissible limits as recommended by the
power transmission supplier. Correct alignment will result
in a uniform distribution of belt tension across the width
of the pulley (and the motor shaft) and assist with the life
of both the belts and bearings.
NOTE: The pulley should always be mounted firmly
against the shaft shoulder and should be a firm fit onto
the shaft. Impact force must not be used.
• Right & wrong alignment to be identified clearly.
As a general rule the midpoint of the applied force should be at the
midpoint of the shaft and it is good engineering practice to mount
the motor pulley with hub and locking screw at the shaft end.
NOTICE: BEARING FAILURE
components onto the shaft. Striking or hammering components
may result in bearing damage.
.
During assembly do NOT force
4.3.4 DIRECT COUPLED
Where direct coupling of the motor is required, proper
alignment must be achieved to prevent bearing damage to
both motor and load. Use flexible couplings if possible.
For parallel offset, use a straight edge or other recommended
tools, as shown below.
Excessive angular displacement must also be prevented. The
recommended method to achieve correct angular alignment
is shown below.
4.3.5 AXIAL LOAD
Where motors with standard bearings are required to be
mounted in either vertical shaft up or vertical shaft down
orientation, there are limits on the axial forces that must not
be exceeded. This also applies to horizontal mounted motors
with certain loads that produce axial thrust.
Axial loads exceeding those listed in the catalogue will
reduce bearing life and may lead to internal motor damage.
Different bearing types will be required where higher than
recommended axial loads are necessary. (Contact customer
service team).
4.4 COOLING
There are various types of cooling methods. IC 411 (Totally
Enclosed Fan Cooled) is the most common cooling method used
for the TerraMAX
motors.
®
The IC 411 cooling method uses a fan mounted on the non-drive
end of the motor shaft, enclosed by a fan-cowl. Air is drawn
through the grilled opening of the fan-cowl and guided over the
fins of motor frame by the fan. The fan itself is designed for either
direction of the rotation, standard direction being clock-wise from
driving end or as specified on the fan-cowl.
It is important that the cooling fins remain clear of debris to
allow the airflow to be fully effective in maintaining motor
winding temperature within the design limits.
©2019, 2020 Regal Beloit Corporation, All Rights Reserved. MCIM2022E • Form# SB0250E
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