Airflow is what makes a canister or central vacuum feel strong at the end of a long hose, and the Ametek Lamb 116146 is the high-efficiency member of the 5.7 in two-stage thru-flow family. At 115 CFM it moves more air than most motors of the same size and stage count, which is why it turns up in commercial canister vacuums, central vacuum power units and dry pickup machines where hose runs are long and the operator judges the machine by pickup at the tool. Service technicians order it as a like-for-like replacement when the original motor has run out its brush and bearing life.
Thru-flow is the key design point. The motor is cooled by the same air the machine is moving, which keeps the assembly short and efficient but means the motor is intended for dry pickup. If the machine recovers water, a bypass motor is the correct family and this one is not a substitute, even where the mounting bolts line up.
Built for
- Commercial canister and upright vacuums used in daily janitorial routes
- Central vacuum power units serving long tubing runs
- Dry pickup shop and utility vacuums where CFM matters more than lift
- Equipment builders replacing a worn high-efficiency 5.7 in two-stage motor
Specifications
- Type: Ametek Lamb vacuum motor / blower, thru-flow
- Blower stages: 2
- Discharge: thru-flow
- Body diameter: 5.7 in
- Overall height: 5-9/16 in
- Voltage: 120 V, 50/60 Hz, single phase
- Maximum amps: 9.5
- Airflow: 115.0 CFM at a 2 in orifice
- Sealed vacuum (water lift): 96.4 in
- Maximum air watts: 356
- Efficiency: high
- Bearings: ball
- Enclosure: open; mounting: all position, metal brackets
- Thermal protection: none; insulation class A
- Maximum ambient: 40 C
- Duty: intermittent; average life 500 hours
- Standards: UL Recognized E47185, CSA Certified LR31393
Click here to view a complete spec sheet
Frequently asked questions
Can I use this motor on a wet vacuum?
No. This is a thru-flow motor, so the recovered air passes over the motor. Use a bypass motor for any machine that picks up liquid.
What does the high-efficiency rating change?
It means more of the input watts turn into useful air watts. On this motor that shows up as 115 CFM and 356 max air watts from 9.5 amps, better than a standard-efficiency two-stage motor of the same 5.7 in size.
Ball bearings or ball and sleeve?
The 116146 uses ball bearings at both ends. Ball-and-sleeve motors are cheaper to build but generally do not hold up as long under continuous commercial use.
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.
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.
