When a wet extractor or recovery machine stops pulling water out of carpet, the motor is usually the reason, and on a high-lift machine the replacement has to match on water lift rather than on airflow alone. The Ametek Lamb 11611900 is a three-stage, 7.2 in bypass motor built for exactly that job: it is one of the larger-diameter Lamb motors, wound for 120 volts, and rated at 134 in of sealed water lift. Machine owners and service technicians buy it as a direct replacement for the original motor in truck-portable extractors, wet/dry recovery units and self-serve vacuum equipment where suction, not air volume, is what the machine is judged on.
The practical advantage of the bypass layout is separation. Cooling air for the armature runs its own path and never mixes with the dirty, wet air the machine is recovering, so water and grit do not pass over the commutator. That is why bypass motors are the standard choice for anything that picks up liquid, and why a thru-flow motor is not a safe substitute here even when the mounting dimensions look similar.
Built for
- Wet/dry recovery vacuums and carpet extractors that are rated on water lift
- Self-serve car wash vacuum islands running long continuous cycles
- Restoration and flood-recovery equipment where deep suction is the whole point
- Industrial and material-handling vacuums built around a 7.2 in motor opening
Specifications
- Type: Ametek Lamb vacuum motor / blower, bypass
- Blower stages: 3
- Discharge: tangential
- Body diameter: 7.2 in
- Overall height: 7-23/32 in
- Voltage: 120 V, 50/60 Hz, single phase
- Maximum amps: 12.6
- Airflow: 94.0 CFM at a 2 in orifice
- Sealed vacuum (water lift): 134.0 in
- Maximum air watts: 438
- Bearings: ball
- Enclosure: open; mounting: all position, metal brackets
- Thermal protection: none; insulation class A
- Maximum ambient: 40 C
- Duty: intermittent; average life 700 hours
- Standards: UL Recognized E47185, CSA Certified LR31393
- Replacement brushes: 2XB23
Click here to view a complete spec sheet
Frequently asked questions
Is this motor safe for wet pickup?
Yes. The 11611900 is a bypass motor, so the recovered air and water do not pass over the motor windings. That is the configuration Ametek intends for wet recovery, extractors and scrubbers.
What does three stages do that two stages does not?
Each additional fan stage raises sealed vacuum. Three stages is what produces the 134 in water lift figure on this motor. Airflow at 94 CFM is lower than a comparable single-stage motor, which is the expected trade: stages buy lift, not volume.
How long do the brushes last?
Ametek publishes a carbon brush service interval of roughly 500 to 600 operating hours. Brushes worn shorter than 3/16 in should be replaced. A motor will typically accept two brush changes before the armature or bearings become the limiting part, which puts total service life in the 800 to 1200 hour range under preventive maintenance.
How do I confirm this is the right motor for my machine?
Match the Ametek part number first. If you are cross-referencing, confirm body diameter, number of stages, voltage, discharge type, overall height, bracket style and lead count against the motor currently in the machine before ordering.
What is the difference between bypass and thru-flow?
On a bypass motor the cooling air travels a separate path from the working air, so debris and moisture picked up by the machine never pass over the armature. That makes bypass motors the usual choice for wet pickup, extractors and scrubbers. A thru-flow motor cools itself with the working air, which makes it more compact and efficient but unsuitable for wet recovery unless the machine is specifically designed for it.
Discount Cleaning Products is a United States based dealer for Ametek Lamb vacuum motors and commercial cleaning equipment parts, with live technical support for matching a replacement motor to an existing machine.
