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Motor Size, Compliance, & Installation
EQP Global IEC Series Low-Voltage 50/60 Hz Metric Motor
Direct coupling via a flexible means does not
require a check for minimum sprocket diameter.
The straight-edge or thickness gauge (feeler
gauge) is an alternative method of measuring
coupling adjustment as shown in
Use a straight-edge or thickness gauge to check
the alignment of the circular concentric peripheral
surfaces of the coupling halves as shown in section
A of
Figure 5.
The separation between the faces of
the coupling halves can be measured as shown in
section B of
Figure 5.
Rigid Coupling
tolerances and
tolerances for the circular concentric peripheral
surfaces and coupling faces are provided on
and 9, respectively.
Figure 5. Feeler Gauge.
A
Vibration
On new installations excessive vibration may occur
while running. Motors must not be subjected to
vibration in excess of 0.5 G's in any application
(e.g., shaker screens, vibrating equipment, etc.)
Complete isolation may be required.
Note:
A vibration detector will be required to
measure the system vibration levels.
Listed below are some of the more common causes
of excessive vibration.
• Improper shimming and/or a soft foot.
• Misalignment.
• Shafts of the motor and load are not properly
aligned.
• Unbalanced load.
10
Figure 5.
Flexible Coupling
pgs. 8
B
• Worn bearings on the motor and/or the driven
machine.
• A resonant mounting condition — the effect is
increased when the motor is coupled to the
load.
• Vibration of the driven equipment.
• Sprung shafting.
• Improper or cracked foundation.
• Electrical imbalance.
• Rotor imbalance.
After satisfactory alignment and vibration testing,
install dowel pins in the base of the motor and in the
bases of the driven equipment. This will prevent
creeping and subsequent misalignment during
operation.
Belt Installation
1. Prepare the pulley and belt.
If two or more belts are required, use a matched
set of belts of the same peripheral length.
Provide vent holes on the pulley as large as
possible to allow for ventilation cooling of the
motor.
2. Ensure correct motor direction.
3. Install the pulley.
Put the rim end plane of the pulley and the shaft
jogging section on the same plane so that the
load applied to the shaft jogging section as well
as to the bearing is minimized.
Make the load point nearer to the motor side.
4. Secure the pulley.
5. Ensure that the shafts of the motor and the driven
machine are parallel.
6. Ensure that the line drawn between the centers
of the two pulleys is perpendicular to the shafts.
7. Install the belt(s) and adjust for the proper
distance.
8. Tighten belts enough to prevent slippage only.
Belt speed should not exceed 1981 m (6500 ft.)
per minute. Consult belt/sheave supplier if
required.
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