The Ametek Lamb 116111, sold by the manufacturer as 116111-00, is a 5.7-inch two-stage thru-flow motor for 220 to 240 volt equipment. Thru-flow is the distinguishing feature and the thing to understand before ordering: the air being picked up is also the air that cools the windings, exhausted directly across the motor on its way out. That arrangement is efficient and it gives this small motor 113 CFM of airflow on about 1025 watts, but it strictly limits the motor to clean, dry, filtered air. Service techs buy it to rebuild dry-pickup canister and central vacuum machines on 240 volt supply, where it restores original performance for a fraction of the cost of a new unit.
Use Cases
- Rebuilds 220-240 volt dry-pickup canister and central vacuum machines
- Restores airflow in commercial dry vacuums after motor failure
- Replaces the motor in export-market equipment specifying a 5.7-inch thru-flow unit
- Powers dry material handling and air-moving equipment on 240 volt supply
- Serves as a stocked spare for facilities running 240 volt dry vacuum equipment
Specifications
- Blower stages: 2
- Body diameter: 5.7 in
- Voltage: 220-240 V AC
- Rated power: 1025 W
- Current draw: 5.8 amps
- Maximum airflow: 113 CFM
- Airflow system: thru-flow, peripheral discharge
- Overall height: 6-1/16 in
- Speed: single speed
- Manufacturer part number: 116111-00
- Cross reference: 4M901
Dry air only
Because this is a thru-flow motor, the working air passes over the windings. Moisture, foam or chemical mist reaching them causes an immediate short and destroys the motor. If your machine does any wet pickup at all, it needs a bypass motor instead, not this one.
A note on the bearing specification
Sources differ on the bearing arrangement for this part: some list it as a ball bearing motor and at least one lists a ball and sleeve combination. Because the two are not interchangeable in every housing, no bearing type is claimed above. If the bearing arrangement matters to your rebuild, contact us before ordering and we will try to confirm it against Ametek documentation.
Fits
Verify against the motor you are removing: body diameter, stage count, voltage, thru-flow construction and the 6-1/16 inch overall height should all match. Ametek publishes several closely numbered 5.7-inch 240-volt motors that differ in stage count and airflow system, so read the full part number on the old motor rather than the first five digits.
Frequently asked questions
Can this motor pick up water?
No. It is a thru-flow design, so the working air is exhausted directly over the motor windings. Water, foam or chemical mist reaching them shorts the motor immediately. Wet pickup requires a bypass motor, where the working air and the cooling air travel separate paths.
Will it run on 120 volt household power?
No. It is wound for 220 to 240 volts and will not develop useful suction on 120 volts. Equipment on North American household circuits needs a 120-volt motor of the same body size and configuration.
How is this different from 116111 with a different suffix?
Ametek publishes several closely numbered 5.7-inch 240-volt motors that differ in stage count, airflow system and bearing arrangement. The suffix is not cosmetic. Read the complete part number stamped on the motor you are removing rather than matching on the first digits.
Why is the bearing type not stated?
Published sources disagree, with some listing ball bearings and at least one listing a ball and sleeve arrangement. Since that difference can affect fitment and expected life, no claim is made here. Ask us before ordering if it matters for your rebuild.
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.
