U.S. ELECTRICAL MOTORS INSTALLATION AND MAINTENANCE

Initial

Installation

VI.

INITIAL INSTALLATION

 

1. Coupling or Pulley Installation

 

Remove the shaft locking device shipped on motor (as applicable). Wash protective coating from the motor

 

shaft extension(s) with solvent. Install couplings or pulleys on motor shaft per manufacturers' recommended

 

fit and mounting practices.

 

Caution: Hammering or pounding with a mallet to install couplings or pulleys will

 

damage bearings.

 

In belted applications, the driver pulley should be positioned as close to the shaft shoulder as possible to

 

assure longest bearing life and keep shaft bending moment to a minimum. Take care to ensure that the

 

inboard edge of the pulley hub does not ride-up on the shaft shoulder blend radius.

Caution:

Caution:

Caution:

Belt tension should not exceed the transmission drive manufacturers' recommendations. Excessive belt tension reduces belt life. Overload due to overtensioning of belts reduces bearing life and can induce shaft fatigue failure.

Excessive bending movement due to placing of pulley far out on the shaft extension will reduce bearing life and may lead to shaft fatigue failure.

Placing the pulley hub onto shaft against the shaft shoulder blend radius may cause a large stress riser in the shaft, resulting in shaft fatigue failure. Prevent this from occurring by using a chamfered spacer ring or chamfering the end of the hub bore.

2.Rough Alignment

Inspect sole plate mounting pads and bottom of motor feet for dirt or irregularities that would prevent proper seating. Position and shim the motor such that the coupling hubs are aligned within 1/32" and the motor shaft is level. The motor shaft must be slightly lower than the driven shaft to allow for final adjustment shims.

3.Final Alignment

Accurate shaft alignment between motor and driven equipment is essential for trouble-free operation. Im- proper alignment can result in vibration, bearing overload and excessive shaft stresses. Flexible couplings may not adequately compensate for excessive misalignment.

Whenever aligning a motor to driven equipment, keep the following rules in mind:

–Do not place more than five shims in a shim pack under any one machine foot, as the flexibility of the shim pack will contribute to a soft foot condition.

–After any corrective adjustment, tighten foot bolts securely and recheck alignment.

–When making shim adjustments, change only one foot at a time.

–Recheck alignment after the motor has been in service for approximately one week and readjust as necessary.

A. Angular Alignment (See Figure 3A)

Check for angular misalignment of motor to driven unit shaft. (See Figure 3A). Measure distance between coupling hub faces (with feeler gauges) at four places equally spaced around the outside diameters. Position motor as necessary to be within the maximum allowable misalignment of .001 in. per foot of coupling radius.

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Emerson 986269, LARGE AC ELECTRIC MOTORS manual Initial Installation
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986269, LARGE AC ELECTRIC MOTORS specifications

Emerson Large AC Electric Motors, specifically model 986269, exemplify cutting-edge technology and exceptional design, catering to the diverse needs of industrial applications. These motors are engineered for reliability, efficiency, and performance, making them suitable for various sectors, including manufacturing, mining, and oil and gas.

One of the standout features of the Emerson 986269 motor is its robust construction. Built to withstand harsh operational environments, this motor has a durable housing that protects it from external contaminants such as dust, moisture, and chemicals, thereby prolonging its lifespan. The design promotes efficient heat dissipation, which minimizes overheating risks and enhances both performance and reliability.

Energy efficiency is a critical aspect of the Emerson 986269 AC electric motor. Utilizing advanced design methodologies, the motor offers high efficiency ratings, which translates into lower operational costs and reduced carbon footprints. It meets or exceeds the latest efficiency standards, making it an eco-friendly choice while ensuring optimal performance in various applications.

Another significant feature is its versatility. The Emerson 986269 motor is available in various sizes and configurations, making it suitable for different tasks and load requirements. Its adaptability allows seamless integration into existing systems, making it a valuable asset for businesses looking to upgrade their machinery without extensive modifications.

The motor employs state-of-the-art technologies such as premium-quality bearings and insulation systems, contributing to its quiet operation and minimal maintenance requirements. This means reduced downtime and increased productivity, both vital for maintaining competitive advantages in today's fast-paced industrial landscape.

Moreover, Emerson's commitment to safety is reflected in the design of the 986269 motor. It is equipped with advanced thermal protection features and complies with international safety standards, ensuring secure operation even in challenging conditions.

In conclusion, the Emerson Large AC Electric Motor 986269 sets the benchmark for performance, reliability, and efficiency in industrial applications. With its robust construction, energy-efficient design, and advanced technologies, it is an investment that promises long-term operational benefits and peace of mind for users. Whether for heavy-duty tasks or general industrial use, this motor remains a top choice for companies aiming to enhance their operational efficiency and productivity.
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