Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors

Choosing The Right Shaft Grounding Ring – Part 3

Aegis
Aegis How to Choose a Shaft Grounding Ring - Part 2

Choosing The Right Shaft Grounding Ring – Part 3

By: Aegis

So far, Aegis has covered clamp-on and conductive epoxy mounting for external installation and bolt-through and press-fit mounting for installing an AEGIS ring inside a motor. This time, they will cover their universal mounting kits.

When to Choose the AEGIS uKit

The fifth and most popular style of AEGIS ring is the uKIT, which is available in solid and split builds. uKITs include a grounding ring and four different sets of mounting brackets. Those brackets allow you to position the SGR at the working diameter of the shaft. (The working diameter is the U dimension for NEMA frame motors, or D dimension for IEC frame.)

Aegis Choosing The Right Shaft Grounding Ring – Part 3That means that all you need to know to choose a uKIT is the motor’s frame size. There’s no need to measure the shaft if it’s wider than the working diameter where the ring would sit. This makes it much easier to size a uKIT than one of the other mounting styles. AEGIS uKITs are available for NEMA frame sizes from 56 to 449T, and IEC frames 100L to to 355M.

The mounting brackets themselves can be attached with bolts, requiring a drill and tap, or with conductive epoxy (EP2400). A split uKIT with conductive epoxy is arguably the easiest AEGIS ring to install.

Aegis Choosing The Right Shaft Grounding Ring – Part 3

There are only a few cases where a uKIT wouldn’t work. Close-coupled pump motors (NEMA frames ending JM or JP) may not have room for a uKIT with mounting brackets between the motor and pump. In this case, you would want a clamp-on or bolt-through ring, either at the drive end or the opposite end (between the motor frame and the cooling fan).

Aegis Choosing The Right Shaft Grounding Ring – Part 3And uKITs can’t be installed inside the motor, as they are sized for the working diameter of the shaft, not the internal diameter. So in very wet or dirty environments, you would prefer to install a bolt-through SGR inside the motor, rather than a uKIT outside. This can be mitigated somewhat by sliding an O ring up the shaft to guard the fibers, as shown.

Related Articles

Related Whitepapers

What is Water Hammer and Why It Is Important to Prevent?

Water hammer (or hydraulic shock) is the momentary increase in pressure inside a pipe caused by a sudden change of direction or velocity of the…

Five Reasons To Choose A Bearingless Torque Sensor

Benefits that improve your torque measurements Best real-world accuracy Highest Overload Highest Overrange

Advanced Sealing and Condition Monitoring Strategies In Water and Wastewater Plants

Introduction As a plant/maintenance manager or reliability engineer for a water or wastewater facility, you want to know about the best technologies to help your…

Downthrust Measurement in Vertical Pumps Prevents Failure: The Benefits of Measuring Axial Force in Real-Time

“Himmelstein’s Thrustmeter has proven to be accurate and repeatable, which are two of the main things that define quality in an instrument. It’s been a…

Comments

Leave a Reply

Your email address will not be published. Required fields are marked *