Lamb Ametek 122172-18, 1-stage, 8.4″ vacuum motor, 240 volt.


Warranty: 30 Days

Mfr. Model #: 122172-18 SKU: MTR648 Categories: , , ,
Shipping Features


New Lamb Ametek 121172-18 vacuum motor, 1-stage, tapered fan system, 8.4 inch, 240 volt high efficiency motor.

It is suggested that you replace the motor gasket, see our part #MTR511.

Uses motor brushes part #MTR1190.

Special features:

  • 1500 plus hours of operational use. Three times that of ordinary motors
  • Up to 45% more efficient that standard tangential motors
  • High efficiency cooling fan
  • Improved sound quality for a less operational noise
  • Same mounting pattern as a standard Ametek 7.2″ tangential bypass motor
  • High efficiency laminated fans for moisture protection
  • UL recognized, category PRQY2 (E47188)
  • Uses Ametek Lamb “Green Label Power” for high efficiency using less power

Motor Specs

  • Motor Type: Bypass
  • Discharge: Tangential
  • Power: 240 volt AC only
  • Bearings: Double Ball Bearing with large 10 mm bearings for extra protection and smooth running
  • Sealed Vacuum: 115.3 inches
  • Maximum Air Watts: 701
  • Maximum Air Flow: 171.7 CFM
  • Maximum amp draw at start-up 7.8
  • Motor Speed: 34.830 RPM
  • Measures 6.00 inches tall and 9.2 inches wide (discharge tube not included)

Design Application:

  • Commercial or residential central vacuum systems
  • Car wash vacuums and blower systems
  • Equipment operating in environments requiring separation of working air from motor ventilation air
  • Designed to handle clean, dry, filtered air ONLY!

This is a special order motor.

Installation note:

Over-tightening of the mounting screws may cause the fan casing to push into the fan blades and may damage the fans.  This situation is not covered under the Motor Warranty Program and will not be approved if submitted.  If motor is turned in under warranty and is found to have the type of damage explained above, the warranty will be denied.  When mounting your new motor, in most cases a touch BEYOND “finger tight” is all that is required to mount and seat the motor sufficiently.


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SKU: MTR1190
$29.49 available on subscription
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