The Ametek Lamb 115963 is a 7.2-inch two-stage peripheral bypass motor for 220 to 240 volt equipment, and among the 240-volt motors in this size it is one of the stronger ones: roughly 1475 watts, 114.6 CFM of airflow, 375 air watts and 104.6 inches of sealed lift. Peripheral bypass means two things at once. Bypass, so the working air never crosses the windings and the motor tolerates damp recovery. Peripheral, so the exhaust vents evenly around the circumference of the motor rather than out a side tube. The second point is a fitment matter, and it is the one people most often get wrong when ordering a replacement.
Use Cases
- Rebuilds 220-240 volt commercial canister and utility vacuums with peripheral discharge housings
- Restores central vacuum power units on export-market and industrial 240 volt supply
- Powers sprayers, foggers and material handling equipment requiring bypass cooling
- Drives car wash vacuum stations and recovery machines on 240 volt service
- Serves as a high-output replacement where airflow and lift both matter on 240 volts
Specifications
- Blower stages: 2
- Body diameter: 7.2 in
- Voltage: 220-240 V AC
- Rated power: 1475 W
- Maximum airflow: 114.6 CFM
- Maximum air watts: 375
- Sealed vacuum (water lift): 104.6 in
- Airflow system: bypass, peripheral discharge
- Bearings: ball bearings with air-sealed protection
- Overall height: approximately 6-7/8 in
- Speed: single speed
- Agency: UL recognized, CSA certified
Fits
The 7.2-inch two-stage peripheral bypass format on 240 volts appears across many equipment brands, so no single machine list is authoritative. Verify against the motor you are removing: body diameter, stage count, voltage, discharge style and mounting height all have to match. The 120-volt sibling of this motor carries a different part number and is not interchangeable.
Frequently asked questions
What is the difference between peripheral and tangential discharge?
It is where the exhaust air leaves the motor. Peripheral discharge vents evenly around the perimeter of the motor housing; tangential discharge sends the exhaust out through a tube on the side. The machine housing is built for one or the other, so the replacement motor has to match the original or the exhaust path will not line up.
Is this motor safe for wet pickup?
It is a bypass motor, which is the construction wet-capable machines use: the working air is kept away from the windings and the motor cools itself with a separate air path. Whether your machine as a whole is rated for liquid still depends on its tank, float shutoff and filtration, not on the motor alone.
Will it run on 120 volt household power?
No. It is wound for 220 to 240 volts. On 120 volts it will turn far too slowly to produce useful suction. Machines on North American household circuits need the 120-volt equivalent motor instead.
How does 375 air watts compare to other motors this size?
It is a strong figure for a 240-volt 7.2-inch motor, and the 114.6 CFM airflow is higher than most two-stage motors in the same body size. Air watts combine airflow and sealed lift into one number, which makes it the most useful single figure when comparing motors.
Discount Cleaning Products is an authorized dealer for Ametek Lamb vacuum motors and stocks replacement motors, carbon brushes and service parts for commercial and central vacuum equipment. Orders are supported by a US-based team that works with these motors every day, so if you are unsure which body diameter, stage count, discharge style or voltage your machine takes, ask before you order.