A commercial backpack that has lost its pull is usually not a machine you replace. It is a motor you replace. Part 100323 is the 220-volt, 5.7-inch, two-stage through-flow vacuum motor rated at 113 CFM, and it is the higher-output of the two motors in this class, intended for service technicians and maintenance departments rebuilding an export or international machine and reusing the existing crimps, ground clamp, compression ring and mounting hardware.
Built for
- Motor replacement in 220V and 50 Hz commercial vacuums, where the technician already has the wiring hardware and needs the motor alone.
- Higher-lift substitution in export machines whose original motor is no longer available, where the extra sealed lift is welcome.
- Non-vacuum through-flow applications on 220V mains, including carpet dryers, air movers and pneumatic conveying, where a compact two-stage blower is needed.
What a 5.7-inch 2-stage thru-flow motor is
The 5.7-inch figure is the fan and body diameter, the standard mounting dimension for commercial vacuum motors, not a power rating. Two-stage means two fans are stacked in series, with the first pressurizing air into the second, which raises sealed suction well above a single-stage motor at similar wattage. Through-flow, sometimes written thru-flow or flow-through, means the working airstream passes through the motor and cools the armature and brushes on its way out.
That cooling method is why through-flow motors are lighter and more compact for a given airflow, and it is also the one rule you cannot break: they are rated for clean, dry, filtered air only. Never use a through-flow motor for wet pickup, and never run one with neglected filters. Filter neglect is the leading cause of through-flow motor failure, because the motor sits directly downstream of the debris path.
Why a 220-volt version exists
These motors serve machines sold outside North America, where mains supply is typically 220 to 240 volts at 50 Hz, as well as export builds of North American machines. A 220-volt motor is not a more powerful version of the 120-volt motor; it is the same fan geometry rewound for double the voltage at roughly half the current. If you are converting or repairing an export machine, remember that the ancillaries change too, including the switch cord assembly.
How long these motors last, and how they tell you
Repair-trade figures put the original carbon brush set at roughly 700 to 900 hours, with a fresh set of brushes buying about 400 more, and a practical ceiling near 1,200 hours before bearings or the armature become the limiting factor. Brushes are considered finished when worn shorter than 3/16 inch from a new length of about 3/4 inch.
A motor on its way out announces itself: suction that keeps falling after a bag change, a filter clean and a clog check; a rising whine, squeal or grinding from the bearings; visible sparking or a heavy arcing glow at the commutator; a burnt electrical smell; carbon dust collecting in the filter chamber; and intermittent cut-outs. Two or more of those together, with filters and clogs ruled out, is the standard call to replace the motor.
Specifications
- Fan diameter: 5.7 inches
- Voltage: 220 VAC, 50/60 Hz
- Stages: 2, series universal
- Airflow type: through-flow (clean, dry air only)
- Rated airflow: 113 CFM / 291 air watts as commonly listed
- Sealed lift: 105.2 inches of water
- Free airflow: 119.7 CFM at a 2.0-inch orifice
- Peak air watts: 346
- Current: 3.5 amps sealed to 6.3 amps open
- Input power: 818 to 1,441 watts
- Bearings: ball and ball
- Construction: skeleton frame, carbon brushes, aluminum commutator and fan brackets, lead-wire connection
- Thermal protector: none
- Insulation: Class A, intermittent duty
- Certification: UL Recognized
- Overall height: approximately 6-1/16 inches
- Reference specification: Ametek Lamb 116111-00
Fitment
We publish the motor specification rather than a machine fitment list, because the manufacturer does not publish one for this part number and inventing compatibility is how the wrong motor ends up in a box. Match fan diameter, voltage, stage count, mounting arrangement and lead configuration against the motor currently in your machine, or send us a photograph of the existing motor nameplate and we will check it against the specification for you.
Installation tips from the trade
Photograph the wiring before you disconnect anything, because remembering how a motor was wired after the fact is the most common way a straightforward swap goes wrong. Cut old crimp connectors at the metal barrel rather than reusing them, and use crimp or butt connectors rather than twist-on wire nuts, which are designed for solid wire in static locations and are unreliable on stranded conductors in a machine that vibrates. If you are seating new carbon brushes yourself, bed them in at reduced voltage before putting the motor under load; running brand-new brushes at full voltage pits the commutator through excessive arcing.
Frequently asked questions
Is this motor 220V or 240V?
The Ametek Lamb 116111-00 specification that matches this motor is rated 220 VAC at 50/60 Hz, and vendors commonly list it as 220 to 240 volts. It will not run correctly on 120 volts.
Can I use it to pick up water?
No. This is a through-flow motor, rated for clean, dry, filtered air only. Wet pickup requires a bypass motor with a separate cooling fan.
Does it include the fan?
Yes. The 5.7-inch two-stage fan assembly is integral to the motor. It does not include crimps, cord, switch or mounting hardware.
How does it differ from the 102 CFM motor?
More lift and more airflow, at higher current. The 113 CFM specification carries 105.2 inches of sealed lift, 119.7 CFM free airflow and 346 peak air watts, drawing up to 6.3 amps. The 102 CFM motor carries 98.6 inches of lift, 106.5 CFM and 281 peak air watts at up to 4.4 amps. This motor also uses ball bearings at both ends rather than ball and sleeve.
Does it have a thermal cut-out?
No. There is no thermal protector on this motor class. Keep filters clean and do not run it restricted.
Will it fit my machine?
Confirm the fan diameter, voltage, mounting arrangement and lead configuration against your existing motor before ordering. We do not publish a model fitment list for this part because the manufacturer does not publish one, and we would rather check your machine with you than guess.
Discount Cleaning Products supplies commercial vacuum motors and wear parts with US-based support before and after the sale. Send us the nameplate off your old motor and we will confirm the specification match rather than let you find out on the bench.
