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EASA's private webinars

Displaying 6 - 10 of 54 private webinars available

Balance Quality Requirements of Rigid Rotor—Applying ISO 1940/1

When is a machine rotor or armature balanced “good enough” and how does that relate to how smoothly the machine runs? How much a machine will vibrate (or how smoothly it will run) depends on quite a number of variables besides balance.

This webinar will provide valuable and practical information on this topic. Additionally, it will cover balance quality grades and how to determine if a rotor meets the appropriate grade as well as some of the factors that affect the final vibration level.

Topic(s): Balancing

Basics of Machinery Foundations and Bases

A faulty machine foundation or base can lead to excessive vibration and premature failure. This webinar will explain the fundamentals of machinery foundation construction and how to identify and trouble shoot machine base problems, including basic vibration techniques and ODS analysis.

Topic(s): AC, DC, Alignment, Mechanical, Vibration

Bearing Analysis and Failure Modes

This webinar will identify and define these failure modes:

  • True and false brinelling
  • Spalling
  • Fluting (bearing current)
  • Cage damage
  • Fretting
  • Loss of fits
  • Lubrication problems
  • Shields and seals
  • Skidding
  • Preload
  • Internal clearance
  • Load zone and ball track
  • Key indicators: temperature, noise, vibration

Topic(s): Bearings, Root cause failure analysis

Belt Loads

This session will address the impact of overhung loads on bearing life. Critical factors include belted horsepower, belt tension, sheave sizes and sheave location. The use of ball bearings versus roller bearings will be considered as well as the factors that affect that decision. Not all belted loads should be roller bearings! Methods to calculate the bearing load and maximize life of the bearings will be shown.

Who should attend

The webinar will be most useful for service center and field technicians, service center managers, and engineers with a need to understand how overhung loads can lead to catastrophic bearing failure.

Topic(s): Bearings, Mechanical

Concentric or Lap? Considerations for the 2-Pole Stator Rewind

Two-pole motors present special rewind issues, especially when converting them from concentric to lap windings. The pitch is especially important as certain coil pitches will cause harmonics that have a negative impact on performance. Optimum pitches are often very difficult to wind and shorter pitches result in sacrificed conductor area. This webinar will explore sample redesigns and present some guidelines to assist in deciding between the concentric and lap winding.

Who should attend
This webinar will be most useful for service center winders, engineers, supervisors and managers. The content will be beneficial for beginners through highly experienced persons.
Topic(s): AC, Repair tips/procedures, Theory & design