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Kevlar/Lexan impellers on Kirbys

Why does everyone get so excited about the name of the "plastic" that the impellers are made of? Kirby is a well-made vacuum cleaner (among the best, some would argue), and the bottom line is that the company would not CONTINUE to install an impeller that is sub-par if it demonstrated the propensity to prematurely fail. If you want to be technical, the impellers are made of neither Kevlar nor Lexan. They are made of Amodel, which is the most state of the art plastic when considering the needs that any impeller has- impact resistance combined with heat resistance and chemical resistance.

Let's put household vacuum cleaners in their place. They are made to clean/remove the stuff that you cannot easily pick up otherwise. They are NOT make to pick up spilled or dropped items without first physically sweeping up the 95% by hand that you can see. They are not made to clean up after someone tracks in dirt. They are made to clean the particles that are small enough to fall or settle deep in the carpet's nap. First you pick up what you see, THEN YOU VACUUM! The evidence lies in the vintage vacuum cleaners that still have original fan blades. Their owners used them ONLY for their intended purpose. Even the metal impellers have a propensity to fail if misused! No blade will catastrophically fail as long as the machine is used properly. Yes, sand and abrasive things like that over time will wear impellers, and the plastic ones will wear faster, but SO WHAT. That should not be a factor for the majority of users when considering the "performance" or "value" of a vacuum cleaner.
 
Just Curious...

Does anyone know why Kirby decided to switch from metal fans to Kevlar ones?

I think they must have had a very good reason to do this and it was most likely not done to reduce the cost of manufacture considering the high retail cost of the vacuum cleaner. Since Kirby is known for their research I assume the change was done to enhance performance in some way.

If anyone out there who is or was affiliated with Kirby knows the answer to this question, I think there would be many on here who would like to know.
 
Amodel polymer fans are much stronger than metal ones!

I did some research on this and what I found is very interesting.

The fans that are installed in the newest Kirby's from the G5 through Sentria II are made from Amodel, NOT Kevlar as almost everyone on here has thought.

For a while Kirby used Lexan, which was discontinued when the switch to superior Amodel was made in the G5. Amodel is widely used in the Aerospace industry so Kirby designed the new fan with the aid of NASA so that it would be the most durable and produce maximum airflow(CFM).Many folks on here, confused Lexan and Kevlar with Amodel. There were some problems with the Lexan fans after a few years of use. They would suffer stress fractures and would break apart if hit by any foreign object (not regular dirt).

Amodel is a new type of polymer that is several times stronger than either Aluminum, which is used in the Royal metal upright vacuums, or Kevlar which was NEVER used in any Kirby vacuum. The Amodel fan is tougher than metal and believe it or not, will almost always outlast Lexan and metal fans.

A few years ago, Kirby did a demonstration for some VCCC members during a tour of the factory where they used a Kirby vacuum with Amodel fan to suck up a bowlful of large nuts, bolts, marbles and pebbles. After disassembly, the fan had only a couple of very small nicks on it and deemed fully serviceable.

The Kirby Sentria with it's higher speed motor, and NASA designed Amodel fan, produces more airflow (115 CFM) than any previous Kirby model.

Here is a statement which you can lookup on the internet from Solvay Advanced Polymers who is the manufacturer of AMODEL:

" About AMODEL Polyphthalamide--

With a heat deflection temperature of 536 degrees Fahrenheit (280 degrees
Celsius) and continuous use temperature of 338 degrees Fahrenheit (170 degrees
Celsius), AMODEL PPA retains its exceptional mechanical properties --
strength, stiffness, fatigue and creep resistance -- over a broad range and in
high humidity environments. This versatile family of high-temperature nylons
can give you the strength of aluminum, the stiffness of steel, and the impact
and ductility of hard rubber --"

I hope you all enjoyed the fruits of my research of AMODEL.

-Stan
 

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