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Section 2
Installation & Operation
Overview
Installation should conform to the National Electrical Code as well as local codes and practices.
When other devices are coupled to the motor shaft, be sure to install protective devices to prevent future
accidents. Some protective devices include, coupling, belt guard, chain guard, shaft covers etc.
These protect against accidental contact with moving parts. Machinery that is accessible to personnel
should provide further protection in the form of guard rails, screening, warning signs etc.
Caution:
Do not use Silicone grease or Sealing Compounds (RTV) on or in the vicinity of the motor or its air
supply. Silicone vapor inside the motor will result in extremely rapid brush wear.
Location
The motor should be installed in an area that is protected from direct sunlight, corrosives, harmful gases
or liquids, dust, metallic particles, and vibration. Exposure to these can reduce the operating life and
degrade performance. Be sure to allow clearance for ventilation and access for cleaning, repair, service
and inspections. Ventilation is extremely important. Be sure the area for ventilation is not obstructed.
Obstructions will limit the free passage of air. Motors get warm and the heat must be dissipated to
prevent damage.
These motors are not designed for atmospheric conditions that require explosion proof operation.
They must NOT be used in the presence of flammable or combustible vapors or dust.
TEFC motors can be used for indoor or outdoor standard service. They cannot be used outdoors where
they would be exposed to freezing rain. Standard TEFC motors are not designed for atmospheric
conditions requiring explosion-proof operation, such as flammable or combustible vapors or dust.
Caution:
Do not lift the motor and its driven load by the motor lifting hardware. The motor lifting hardware
is adequate for lifting only the motor. Disconnect the load (gears, pumps, compressors, or other
driven equipment) from the motor shaft before lifting the motor.
Mounting
The motor must be securely installed to a rigid foundation or mounting surface to minimize vibration and
maintain alignment between the motor and shaft load. Failure to provide a proper mounting surface may
cause vibration, misalignment and bearing damage.
Foundation caps and sole plates are designed to act as spacers for the equipment they support. If these
devices are used, be sure that they are evenly supported by the foundation or mounting surface.
After installation is complete and accurate alignment of the motor and load is accomplished, the base
should be grouted to the foundation to maintain this alignment.
The standard motor base is designed for horizontal or vertical mounting. Adjustable or sliding rails are
designed for horizontal mounting only. Consult your Baldor distributor or authorized Baldor Service
Center for further information.
Alignment
Accurate alignment of the motor with the driven equipment is extremely important.
1. Direct Coupling
For direct drive, use flexible couplings if possible. Consult the drive or equipment manufacturer for
more information. Mechanical vibration and roughness during operation may indicate poor alignment.
Use dial indicators to check alignment. The space between coupling hubs should be maintained as
recommended by the coupling manufacturer.
2. End-Play Adjustment
The axial position of the motor frame with respect to its load is also extremely important. The motor
bearings are not designed for excessive external axial thrust loads. Improper adjustment will cause
failure.
3. Pulley Ratio
The pulley ratio should not exceed 8:1. Consult your Baldor distributor or authorized Baldor Service
Center for further information.
Caution:
Do not over tension belts. Excess tension may damage the motor or driven equipment.
4. Belt Drive
Refer to NEMA MG 1 section 14.07 or Baldor application section for the application of pulleys,
sheaves, sprockets, and gears. Align sheaves carefully to minimize belt wear and axial bearing loads
(see End-Play Adjustment). Belt tension should be sufficient to prevent belt slippage at rated speed
and load. However, belt slippage may occur during starting. Do not over-tension belts.
Caution:
Series wound motors must never be allowed to run with no load (broken belt etc.)
An unloaded motor may reach destructive high speeds.
MN605
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Installation & Operation 2-1
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