The Ametek Lamb 116309-00 is a single stage 5.7 inch thru flow vacuum motor rated at 120 volts, the workhorse motor found in a great many commercial vacuums, central vacuum power units, floor machines and OEM built vacuum assemblies. Thru flow construction means the working air passes across the motor and cools it as it goes, which is what makes this design suitable for continuous duty dry pickup where a bypass motor would be specified for wet work or for applications where the air is contaminated.
Motors are replaced rather than rebuilt in most service situations, because brush and bearing wear tends to arrive together after several thousand hours and the labor to open and refit a motor rarely justifies itself. The usual symptoms are unmistakable: the motor screams or growls, it draws heavily at startup, it throws carbon dust, or it stops entirely. Matching the replacement on stage count, diameter, voltage and bearing type is what determines whether the machine performs the way it did when new.
Built for
- Commercial vacuums and wet dry vacuums built on the 5.7 inch Lamb platform
- Central vacuum power unit motor replacements
- Floor machines and OEM vacuum assemblies specifying a single stage thru flow motor
- Service shops rebuilding machines where the original motor has failed
- Applications needing 120 volt single stage airflow rather than high vacuum lift
Specifications
- Stages: 1 stage
- Diameter: 5.7 inch
- Voltage: 120 volt
- Rated power: approximately 850 watts
- Airflow design: thru flow
- Bearing configuration: ball and sleeve
- Manufacturer part number: 116309-00
Frequently asked questions
What is the difference between thru flow and bypass?
On a thru flow motor the working air passes across the motor and cools it. On a bypass motor the cooling air is separate from the working air. Thru flow is standard for dry pickup, while bypass is specified where the air is wet or heavily contaminated. Replace like for like unless the machine manufacturer says otherwise.
How do I know this is the right motor for my machine?
Match four things: stage count, frame diameter, voltage and airflow design. A single stage 5.7 inch 120 volt thru flow motor is not interchangeable with a two stage or a bypass unit even when it physically fits. The safest approach is to read the number off the old motor and have us confirm the cross reference.
What are the signs a vacuum motor is failing?
A rising pitch or growl, heavy current draw at startup, carbon dust around the motor housing, a burning smell, or intermittent stopping. Bearings and brushes tend to reach the end of their life at similar hours, so a motor showing one symptom usually has the others coming.
Should I replace the motor filter and gasket at the same time?
Yes. A fresh inlet filter keeps dust off a new armature and a new gasket restores the seal between motor and housing so the machine does not pull bypass air. Both are inexpensive and the housing is already open, so it is the natural time to do it.
Discount Cleaning Products is an authorized dealer for the brands we carry, and we stock genuine and OEM-equivalent replacement parts alongside the machines they belong to. Our US-based team can confirm fitment against your model and serial number before you order, so the part that arrives is the part your machine actually takes.
