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AR - Pro Series

The AR Series rotary phase converters provide reliable three-phase power for workshops, farms, and small industrial environments operating on single-phase electrical service.

Designed as a dependable general-purpose phase conversion solution, AR converters allow equipment such as woodworking machinery, pumps, compressors, welders, and shop tools to operate where utility three-phase power is not available.

Built using American Rotary’s purpose-designed phase conversion engineering, the AR Series delivers stable voltage and balanced power to keep motors running smoothly and efficiently.

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When to Choose the AR - Pro Series

The AR – Pro Series is designed for general-purpose phase conversion in workshops and small industrial environments where reliable three-phase power is needed without complex controls.

Typical applications include woodworking machinery, shop tools, pumps, compressors, and general manufacturing equipment operating on single-phase electrical service.

AR converters provide dependable phase conversion for many common motor loads while maintaining a straightforward electrical design that is easy to install and operate.

If your equipment is particularly voltage-sensitive, such as CNC machines or welders, the AD Series digital phase converters may be a better option.

Learn more about American Rotary engineering → 

AR - Pro Rotary Phase Converter Models

Compare horsepower options to find the right general-purpose rotary phase converter for your shop tools, woodworking machinery, and light industrial equipment.

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Watch this quick guide on the 5 things you need to know before choosing a phase converter. It explains what matters, what to avoid, and how to make sure your equipment gets the right power.

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Our Advantages

Why Choose American Rotary
Phase Converters

Same-Day Shipping

Converters are built, tested, and stocked in our Wisconsin facility, then shipped the same day. You get the power you need without waiting weeks.

Proprietary Technology

Custom Baldor generator, digital MicroSmart™ control, CTR™ stabilization, and surge protection — technology you’ll only find at American Rotary.

Lifetime Warranty

Every converter is backed for life. You know we will support the unit as long as you own it.

Same-Day Replacement

If something does go wrong, we do not leave you stuck. We ship a replacement converter the same day so you can get back up and running.

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Customer stories

Real experiences from people who trust our products

My old rotary phase converter gave 30 years of faithful service before it went up in smoke. With customers asking when I’d be operational, I researched every manufacturer and the choice was clear on American Rotary. First impression when it ... READ MORE

FAA Certified Machine Shop Owner

  • Machining

Very good company to do business with. The salesman Lenny treated me like I was a big company. I was shopping for a roto phase for my home machine shop. He had all the time in the world for me. ... READ MORE

Rodney Mears

  • Machining

A quick google search pointed me toward American Rotary. It wasn’t their website or their pricing but the number of videos and testimonials about the quality of their product and the great service. I wasn’t disappointed. I called on a ... READ MORE

Carl DiPaolo

  • Machining

I purchased this unit for a tenant in a commercial property that needed 3 phase power and the cost for the utility company to bring it in was significantly higher with much longer times to complete the project. The phase ... READ MORE

Matt Peace

  • Metalworking

I tried an inexpensive digital converter that made my machine motors very hot due to unbalanced power. A person I bought a milling machine from said he had an American Rotary and was very happy with the quality, so I ... READ MORE

Brad Everett

  • Machining

When I started, the garage had a single 120 V receptacle behind a shelf. Now, there (4) duplex 120A receptacles, (1) NEMA 16,20 A 240/120V with a DPDT switch to select voltages. 30A 50A 1 phase receptacles. Two 20A, one ... READ MORE

Raymond Jensen

  • Agriculture

I called in a talked to a representative told them I have a refrigeration unit I was looking to run 3 phase to, gave them the specs and was recommended the ADX 10. I ordered it super fast shipping got ... READ MORE

Jonathan Arrington

  • Food Service

I had to move my workshop due to rent increases. The one I found didn’t have 3 phase. I found some cheap crappy digital shifter…didn’t work. Then I found American Rotary, they are the real deal! I am able to ... READ MORE

Mike Chinn

  • Woodworking

para todos los hispanohablantes America Rotary 100% recomendado fácil de instalar fácil de manejar fácil de cablear todo perfectamente gracias por su ayuda para poner en funcionamiento mi máquina edgebanding 3 Phase For all Spanish speakers, American Rotary 100% recommended. ... READ MORE

Neftaly Bustos Custom

  • Woodworking

Just got my ADX 5 up and running couldn’t be happier with my decision to purchase this excellent customer service and tech support. A++++++

... READ MORE

Mark Anderson

  • Metalworking

Absolutely love what american rotary does. Had a wonderful experience with their support team the phase converter we purchased and the transformer were supper easy to install definitely recommend buying from them. Customer service is 10/10

... READ MORE

Custom Machined Concepts | Andrey Girenko

  • Machining

American Rotary is an awesome company to work with, Mike was/is very helpful in answering my questions and getting me what I needed to get my shop ready for a new machine, giving me an option to either piggy back ... READ MORE

Charles Nelson

  • Machining

FAQs

Everything you need to know about getting the right power for your equipment.

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What is a rotary phase converter?
A rotary phase converter converts single-phase power into balanced three-phase power. This allows businesses and shops to operate standard three-phase equipment even when utility three-phase service is not available.
AR – Pro converters are designed for light to medium duty equipment such as drill presses, table saws, woodworking machines, small CNC equipment, and general-purpose shop tools.
Rotary phase converters are typically sized based on the horsepower of the largest motor you plan to run. For best performance and starting capacity, many applications follow a 2:1 sizing guideline between the converter and the load.
The AR Series is designed for general-purpose loads. The AD Series adds digital voltage balancing for voltage-sensitive equipment. The ADX Series provides higher starting torque for heavy loads, while the AUL Series offers UL-certified construction for installations requiring compliance.
Yes. Rotary phase converters can operate multiple machines as long as the total running load stays within the converter’s rated capacity.
Rotary phase converters generate a balanced third leg of power using an idler generator, allowing equipment to operate similarly to utility three-phase power.
No. Rotary phase converters are specifically designed to allow three-phase equipment to run from single-phase power sources.
AR – Pro converters are designed for straightforward installation with accessible terminal wiring and simple controls. Wall-mounted and floor-mounted configurations are available depending on the model.