Ametek Lamb 116448 Vacuum Motor - 2 Stage, 5.7-inch, Bypass, Peripheral Discharge, 120V
When a central vacuum or a commercial tank machine loses suction, runs hot, or starts to whine, the motor is usually at the end of its service life rather than the machine. This Ametek Lamb 116448 is the 5.7-inch two-stage bypass motor those units were built around, and swapping it is what returns a working power unit to full airflow instead of replacing the whole system. It is the part vacuum service techs, facility maintenance staff and central vacuum installers reach for when a power unit is worth saving.
Built for
- Central vacuum power units that have lost suction or run hot
- Commercial tank, canister and dry-pickup machines built on the 5.7-inch Lamb frame
- Vacuum repair shops rebuilding customer machines
- Facility maintenance teams keeping in-house equipment in service
- OEM builders and integrators specifying a proven 120V motor
Use cases
Bringing a tired central vacuum back to full airflow. Two-stage motors stack two fans in series, which builds far more sealed suction than a single-stage motor can. That is what a central vacuum needs to pull debris through long runs of pipe from a distant inlet. As bearings and brushes wear, that reserve disappears first at the furthest inlet - a fresh motor restores it.
Keeping a bypass machine cool on long runs. A bypass motor routes cooling air through a separate path from the dirty working air, so the motor windings never see the debris stream. That is why bypass units survive long continuous runs and wet-capable service that would cook a flow-through motor. Peripheral discharge exhausts around the circumference of the housing, which is the pattern most central vacuum and tank enclosures are designed to vent.
Repairing instead of replacing. A motor swap is a fraction of the cost and downtime of a new power unit, and on a well-built central vacuum the tank, piping and inlets typically outlast several motors. Common signs it is time: a rising pitch or grinding noise, a hot or burnt-electrical smell, visible sparking at the brush window, or suction that has fallen off with clean filters and clear piping.
Specifications
- Manufacturer: Ametek Lamb Electric
- Part number: 116448 (supersedes and replaces 116448-02)
- Diameter: 5.7-inch frame
- Fan stages: 2 (two stage)
- Motor style: bypass
- Discharge: peripheral
- Voltage: 120V universal AC/DC
- Nominal power level: approximately 1100 watts
Frequently asked questions
Will this motor fit my machine?
It fits power units built around the 5.7-inch two-stage bypass Lamb frame with peripheral discharge. The reliable way to confirm is the part number stamped on the old motor rather than the machine model. Send us your machine model and the number off the existing motor and we will verify the match.
What is the difference between bypass and flow-through?
A flow-through motor cools itself with the same dirty air it is moving. A bypass motor pulls separate cooling air, so debris and moisture never pass over the windings. Bypass motors last longer in continuous-duty and wet-capable machines, which is why central vacuums and commercial tanks use them.
Does 116448 replace 116448-02?
Yes. The 116448 replaces the 116448-02, but you will need to reuse the electrical connectors from your old motor, since terminal styles differ between production runs.
What does two stage mean and why does it matter?
Two stage means two fans in series. The second fan takes the output of the first, which roughly doubles the sealed suction, or water lift, compared with a single-stage motor. It matters most when air has to travel a long distance, such as through central vacuum tubing or a long hose.
How do I know the motor is what failed?
Before replacing a motor, rule out a clogged hose or pipe, a full bag or bin, and loaded filters, since restricted airflow mimics motor failure and also overheats a good motor. If airflow is clear and you still have weak suction, high-pitched whine, excessive heat, sparking or a burning smell, the motor is the likely cause.
Discount Cleaning Products is an authorized dealer stocking genuine and OEM-equivalent replacement parts for commercial and household floor care equipment. Our US-based staff works with these machines every day, so if you are not certain which part your model takes, send us the model and serial number off the data plate and we will confirm the correct fit before you order.
