The Ametek Lamb 116355-01 is one of the stronger two-stage motors in the 5.7-inch bypass family: 121 CFM of airflow, 97 inches of sealed lift and 377 air watts on 240-volt supply at 5.2 amps. It is a car wash and commercial extractor motor as much as a central vacuum motor, and it is bought by operators who need a machine to hold suction through a long hose all day rather than in short bursts. The -01 suffix is not cosmetic: it denotes a bearing rather than a bushing on the cooling fan.
Built for these use cases
- Car wash vacuum stations running long duty cycles on 240-volt supply
- Carpet extractor and wet recovery motor replacement
- Two-stage central vacuum power units on overseas or 240-volt mains
- Commercial machines needing high sealed lift through long hose runs
- OEM and depot service replacement for 116355 family motors
A bypass motor carries a separate cooling fan, so the air that cools the armature and field never mixes with the air being pulled through the machine. That separation is the whole reason bypass motors are specified for wet recovery work such as carpet extraction and autoscrubber recovery, where the airstream is carrying water, foam and cleaning solution. It also means the motor is not being cooled by whatever the operator happens to be picking up.
Tangential discharge routes cooling air out through a single side port, which lets the machine builder aim the exhaust deliberately - into a muffler, a sound baffle, or straight out of the cabinet. On extractors and compact commercial machines where the motor sits in a tight enclosure, that directed exhaust is often the difference between a motor that runs cool and one that heat-soaks.
The dual ball bearing construction and the -01 fan bearing are what make this variant worth specifying for high duty cycle work. Bushings are adequate where a motor runs in short bursts; a bearing tolerates the continuous running that a car wash bay or a full-shift extractor imposes. If you are replacing a motor that has been failing early in heavy service, confirming you have the -01 rather than the -00 is worth the two minutes it takes.
Specifications
- Manufacturer part number: 116355-01
- Frame diameter: 5.7 inches
- Blower stages: 2
- Cooling: Bypass
- Discharge: Tangential
- Voltage: 240 V
- Current: 5.2 A
- Airflow: 121 CFM
- Sealed vacuum: 97 inches of water
- Air watts: 377
- Bearings: Dual ball bearing; -01 denotes a bearing rather than a bushing on the cooling fan
- Enclosure: Open
Frequently asked questions
What is the difference between the 116355-00 and the 116355-01?
The -01 has a bearing instead of a bushing on the cooling fan. In continuous-duty service such as a car wash vacuum or a full-shift extractor, that is the variant you want.
Is 377 air watts a lot for a 5.7-inch motor?
It is toward the strong end of the two-stage 5.7-inch range. Air watts combine airflow and sealed lift, so it is the single most useful number for comparing motors that will do the same job.
Can I use this motor for wet extraction?
Yes. Bypass cooling keeps the recovered water and solution out of the motor's cooling path, which is exactly why extractors specify bypass motors.
Will it run on 120 volts?
No. This is a 240-volt motor. Check the nameplate on the machine before ordering.
How do I get the most life out of it?
Change the carbon brushes before they wear out completely. Ametek's guidance is roughly 60 percent of original life after a first brush change and about 40 percent after a second.
Discount Cleaning Products is an authorized dealer for Ametek Lamb vacuum motors and stocks the matching carbon brush kits, gaskets and mounting hardware alongside them. Our US-based 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.
