Ametek Lamb Motor 117500-12...
$311.99
Product details
This Ametek Lamb motor, part 117500-12, is a three-stage, 7.2-inch, 120-volt bypass unit supplied with the discharge horn fitted. The 7.2-inch frame is the larger of Lamb's two common central vacuum sizes, and three-stage construction trades off some air volume for more lifting power, which is the combination central vacuum manufacturers reach for on systems with long pipe runs or multiple inlets open at once.
Ametek builds this one on its 7.2-inch Premier platform, classes it as a high performance motor, lists its input power at 1600 watts, and rates the 7.2-inch bypass tangential family at sealed vacuums up to 135 inches of water lift and flow rates up to 125 CFM. The replacement brush kit is 833450-57.
Bypass motors keep the cooling air that runs through the motor separate from the dirty airstream pulled in from the house, which is a large part of why they tend to outlast thru-flow motors in continuous whole-house service. The horn at the discharge end is a duct rather than an alarm, shaped to direct exhaust air the way the power unit's housing expects it, so a motor without one will not seat or vent correctly on a machine built around one.
What tends to send someone shopping for this motor: suction gone soft across every inlet rather than one, a bearing that has started to howl or rumble, a burning smell around the power unit, or a motor that hums on start-up but never spins up to speed. Because several central vacuum brands used Lamb's 7.2-inch three-stage motors, compare the horn arrangement and mounting boss against your existing motor before ordering rather than matching by brand alone.
- Part: 117500-12, three-stage bypass motor with discharge horn
- Spec: 7.2-inch Premier frame, 120 volt AC, three-stage bypass
- Power: 1600 watts input
- Replacement brush kit: 833450-57
- Before ordering: match the horn arrangement and mounting boss to your existing motor