The Ametek Lamb 116662-49 is a single-stage, 5.7-inch thru-flow motor for 120-volt machines, and the single-stage fan is the whole point of it. One stage trades sealed lift for airflow, which is why this configuration turns up in compact commercial canister and tub vacuums that move a lot of air through a short hose. At 135.1 CFM it moves more air than most two-stage motors on the same frame. It is a direct replacement wear item for service technicians and facility maintenance staff.
Built for
- Compact commercial canister and tub vacuums with a short hose run
- Machines specified for high airflow rather than high sealed lift
- Dry pickup in facility, janitorial and hospitality service
- Blowers and air movers handling clean, dry, filtered air
- Repair benches stocking single-stage 5.7-inch spares
How this motor works
A thru-flow motor is cooled by the working air, so every cubic foot the machine pulls also passes across the armature and field. That makes for a compact, efficient package on dry pickup, and it is why thru-flow motors dominate residential and light commercial vacuum production. It is also the reason they are the wrong choice for wet recovery: moisture, foam and cleaning solution carried in the airstream reach the windings directly.
Peripheral discharge exhausts cooling air around the full circumference of the motor housing rather than through a single port. In a canister or power unit that has room around the motor, peripheral discharge keeps exhaust noise diffuse and simplifies the mounting, which is why it shows up so often in central vacuum power units and quiet-bypass builds.
Stage count is the trade-off that decides which motor belongs in a machine. Each additional fan stage buys sealed lift and costs airflow. A single-stage motor moves the most air and is right behind a short hose; a two-stage motor is the general-purpose choice; a three-stage motor is what you want when the hose run is long or the tool is restrictive and the machine has to hold vacuum against that restriction.
The 31,600 RPM nameplate speed is high even by vacuum motor standards, and it is how a single fan stage produces 362 air watts. It also means the motor is unforgiving of restriction and imbalance: a partly blocked hose or a filter left in place too long makes it work in a range it was not designed for.
Carbon brushes are the wear part on any Ametek Lamb motor, not the motor itself. Ametek's own guidance is that a set of brushes can be changed twice before the armature and the rest of the assembly need replacing, with roughly 60 percent of original life left after the first change and about 40 percent after the second. If a machine has begun surging, losing suction intermittently, or throwing sparks at the commutator, brushes are the first thing to check before condemning the motor.
The one symptom that is not a brush job is a burning smell. Technicians on carpet-cleaning and contractor forums are consistent about this: a scorched odor means the armature has overheated where the brushes ride, and the machine should be shut down at once rather than run to the end of the job. A motor that has cooked its armature is a replacement, not a repair.
Ametek Lamb part numbers are not interchangeable by diameter alone. Before ordering, pull the old motor and match four things: frame diameter, number of fan stages, discharge configuration and nameplate voltage. Two motors that share a body size can have completely different gasket surfaces, lead lengths and airflow paths, and a mismatch usually shows up as a motor that physically drops in but never reaches its rated suction.
Specifications
- Stages: 1
- Airflow system: thru-flow
- Air discharge: peripheral
- Voltage: 120 V
- Body diameter: 5.7 in
- Maximum amps: 9.2 A
- Maximum airflow: 135.1 CFM
- Sealed vacuum (water lift): 78.8 in
- Maximum air watts: 362
- Speed: 31,600 RPM
- Bearings: double ball bearing
- Weight: 3.74 lb
Fitment
A distributor lists this motor for the Taski Bora and the Taski Vento 15. That is a single source rather than a manufacturer compatibility table, so confirm the part number and the motor's diameter, stage count and voltage against the motor currently in your machine before ordering.
Frequently asked questions
Why would I want a single-stage motor?
For airflow. A single fan stage moves substantially more air than a multi-stage motor on the same frame, which is what a short-hose machine needs. It gives up sealed lift in exchange.
What machines is it listed for?
A distributor lists it for the Taski Bora and Taski Vento 15. That is one source, so verify against your machine's parts list.
How does 135 CFM compare to a two-stage motor?
It is higher. Two-stage motors on the 5.7-inch frame typically publish under 115 CFM but hold far more sealed vacuum. Which matters depends on how restrictive the airpath downstream is.
Is it suitable for wet pickup?
No. It is a thru-flow motor, meaning the air being vacuumed passes across the windings. Wet recovery calls for a bypass motor.
What causes a motor like this to fail early?
Running restricted. At 31,600 RPM a blocked hose or a neglected filter puts the motor outside its design range and shortens brush and bearing life.
Discount Cleaning Products is a United States based dealer for Ametek Lamb vacuum motors and stocks the matching carbon brush kits, gaskets and mounting hardware alongside them. Our team works with these motors every day across central vacuum systems, extractors, autoscrubbers and shop equipment, and can help you confirm frame size, stage count, discharge style and voltage against the motor already in your machine before you order.
