The Ametek Lamb 115923 is a 5.7-inch, 120-volt, two-stage thru-flow motor, and it is the high-airflow member of this family rather than the high-lift one. At 23,700 RPM it moves 122 CFM and puts out roughly 447 air watts, which is why it turns up in dry-pickup machines where volume of air does the work: canister vacuums, dog wash and grooming dryers, car wash vacuum islands and the Miele-fit applications this part is best known for. Thru-flow means the working air is exhausted straight across the motor windings and cools them on the way past. That is a genuinely efficient arrangement, and it comes with one hard rule, covered below.
Use Cases
- Replaces the motor in Miele and Miele-fit canister vacuums that use a 5.7-inch thru-flow unit
- Rebuilds dog wash, grooming and pet dryer equipment where high airflow matters more than lift
- Restores car wash and self-serve vacuum stations running dry pickup only
- Powers commercial dry canister machines and light industrial equipment on 120 volt supply
- Serves as a high-airflow replacement where a two-stage thru-flow motor is specified
Specifications
- Blower stages: 2
- Body diameter: 5.7 in (145 mm)
- Voltage: 120 V AC, 60 Hz
- Rated power: approximately 1350 W
- Motor speed: 23,700 RPM
- Maximum airflow: 122 CFM
- Maximum air watts: 447
- Sealed vacuum (water lift): approximately 100 in
- Current draw: 11.6 amps
- Airflow system: thru-flow
- Bearings: double ball bearing
- Speed: single speed
- Construction: skeleton frame, high airflow fan system, provision for grounding
- Agency: UL recognized category PRGY (E47185); CSA certified class 1611 01 (LR31393)
Dry air only
This is a thru-flow motor, so the air you are picking up is also the air cooling the windings. It is designed for clean, dry, filtered air. Moisture, foam or chemical mist drawn into a thru-flow motor causes an immediate short and destroys it, and no amount of care in use changes that. If your machine does wet pickup, you need a bypass motor instead, not this one.
Fits
This motor is published as fitting several machine families including Miele models, and the same 5.7-inch two-stage thru-flow format appears across many brands. Published sealed-lift figures for this part vary between sources, which is why an approximate value is given above rather than a precise one. Confirm body diameter, stage count, voltage and airflow system against the motor you are removing before ordering.
Frequently asked questions
Can this motor pick up water?
No. It is a thru-flow design, which means the working air passes directly over the motor windings. Water, foam or chemical mist reaching the windings will short the motor immediately. Wet pickup requires a bypass motor, where the working air and the cooling air travel separate paths.
Why is the airflow so much higher than on a bypass motor?
Two reasons. Thru-flow motors do not spend energy driving a separate cooling fan, and this one spins at 23,700 RPM. The result is 122 CFM and about 447 air watts, higher than most bypass motors of similar size, with the tradeoff that it can only handle dry air.
Does it really fit Miele vacuums?
This part number is widely published as a fit for Miele machines, and it is one of the reasons the motor is stocked. Miele has used several motor formats over the years, so confirm the body diameter, stage count and voltage against the motor currently in your machine before ordering.
How often should the carbon brushes be checked?
Brush wear tracks run hours, not calendar age. A common service interval is to inspect at around 500 hours of operation, which is roughly every five to seven years on weekly household use and far sooner on commercial equipment. Replacing worn brushes before they reach the commutator is what keeps the motor serviceable.
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.
