Lamb Ametek 122174-18 , 1-stage, 8.4″ vacuum motor, 36 volt DC.


Warranty: 30 Days

Mfr. Model #: 122174-18 SKU: MTR647 Categories: , , ,
Shipping Features


New Lamb Ametek 122174-18 motor is a brushless, 1-stage,  8.4 inch, 36 volt high efficiency motor.

This motor has a tapered bottom.


We HIGHLY recommend the maximum protection of your motor by using our exclusive Filtered Motor Gasket, part #MTR1500. Our Filtered Motor Gasket is the only one of its kind and only available from Central Vacuum Factory! It is specially designed by our engineers to provide your motor with years of trouble free service by filtering out dust and dirt BEFORE they reach your motor and damaging it! The filtered motor gasket fits flush and is as easy to apply as a regular gasket and will not add any height to your motor during mounting!

For our standard motor gasket, see our part #MTR511.

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: 36 volt DC only
  • Bearings: Double Ball Bearing with large 10 mm bearings for extra protection and smooth running
  • Sealed Vacuum: 83.6 inches
  • Maximum Air Watts: 238
  • Maximum Air Flow: 118.7 CFM
  • Maximum amp draw at start-up 19.6
  • Motor Speed: 24,820 RPM
  • Measures 6.0 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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