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 Twice the life vacuum motors

Ametek's next generation, patented eternity brush motors are an example of how we contribute toward new motor technology. This family of motors was designed to provide on average twice+ the life of the traditional straight brush counterpart. The value to the user is less downtime, less maintenance costs and better value.

Longer brushes mean more life. Traditional brush length is limited by the effectiveness of the spring. Ametek gets around this obstacle by creating curved brushes. The curved brush allows us to increase the brush length by as much as two thirds. The result is 2-3 times the life over normal straight brushes. In some lower amp motor applications, like 8 amps or less, motors can run as long as 5,000-8,000 hrs.
 Eternity Brush Bracket
 Applications that can take advantage of this technology are Car Washes, Pneumatic Tubes such as the ones used in the banking industry where there is high usage, Air Plenum or Air Sampling where the units are running continuously, Pet Grooming where high volume blow drying is needed, high use Hand Dryers and Hood or Welding Exhausts. If an application requires 5,000-10,000 hours of use then a brushless motor makes sense. The price differential between the two can be as much as $150-$175 where the Eternity brush motor is very cost effective.
 

Wet Bearing Protection

The main failure mode in wet applications for vacuum motors is grease washout of the work end bearing.  For years the tradtional designs would only yield 100 hours of life during the notable "suds" test, until Ametek came out with the enahnced bearing seal.  This innovation increased the life during the same test to 250 hours.  Still 250 hours was not sufficient for the commerial marketplace where downtime costs money.
 Wet Bearing Protection
With Ametek's new wet bearing protection the vacuum motors no longer fail due to moisture washing away grease from the bearings.  In fact, you can just about pump water through the fan system and vacuum will not fail do to grease washout.The technology involved a bit of a redesign and a little bit of inginuitiy.  First, we moved the bearing away from the moisture by removing it from the fan system altogether.  Second, we installed a labyrinth seal to provide a impass from the moisture in the fan to the bearing.  Third, we moved the cooling fan from the traditional side of the motor down to its base.  If water made its way past the labyrinth seal it would be wisked away.  If this was not sufficient, we drilled a hole through the shaft and then counter drilled next to the bearing.  When the fan turned the fan eye creates a negative pressure, so if water found its way to the bearing it would be sucked out through the shaft and out the fan system.
   
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