KB Electronics, 9533, KBMA-24D, 1HP, 1-Phase, 110-120V;200-240V (Input), 3-Phase, 240V (Output) - (for Use With 3-Phase Motor) Nema 1 Enclosure, Variable Frequency Drives

This is a great product, it’s quality built, simple to set up, and works well. If you are just looking to run a simple 3 phase machine in a shop with 1 phase power I would definitely recommend this over a digital VFD. The fact alone that you can have the KB drive set up and it runs completely silent, no annoying unnecessarily loud fan, makes it worth it.

I had been using a 220 volt rotary phase converter prior to buying this item, and just wanted a basic 1 to 3 phase converter that did not need a lot of programming setup. The fact that this is 110 volt input and 220 volt output was a winner for me as I wanted to move machine and did not have 220 volts at new location. I did add the For/Stop/Rev switch so now my original switch on the Bridgeport is left in the forward position and I use this to control everything. When removing cover to set up switches, I found that it was difficult to get cover to slide off. Had to pry off with small screwdriver and was able to do so without damaging paint (powder coating?). As I said, this is easy to set up, and wiring was real basic. Would recommend this to all.

Purchased to run the original 3-phase 1HP motor on my Bridgeport J-Head milling machine. Though I have a pretty decent grasp on the subject of electricity, I'm not the most competent when it comes to the practical; despite this, the instructions helped guide me through the process with ease and it does work incredibly well and I simply use a laser tachometer to establish the spindle speed. My only concern is that it does tend to heat up very quickly with use at the top of the unit, with no apparant heat-sink hardware to facilitate cooling (though I aim to build a heat sink to fit between the box and the mount that I made, for the sake of heat dissipation) In addition, I purchased the separate forward/reverse switch (irritating to wait for as it is not available through prime shipping), which again, was very easy to fit and allows switching of the mill's spindle; bearing in mind that in high speed, the switch makes it so that reverse becomes forward Overall, this unit is ideal for providing 3-phase power to the small home workshop, and I plan to purchase another in time for other applications; I only wish they were available for motors with greater power outputs My mount (as pictured), was rigged up using an old TV mount that I modified to suit the purpose and some steel angle, it was then fixed to the base of the machine by drilling and tapping a few 5/16" holes

I bought an old Walker Turner drill press that was in horrible shape. The original motor did work, but groaned and was super loud, so I began researching VFDs and stumbled on this one after seeing it in several YouTube videos. So I bought a three phase motor, and this VFD and gave it a shot. I am not an electrician, but the instructions provided made this install super easy and it works like a charm. This VFD is incredibly reasonably priced compared to others, and doesn’t require extensive programming. I highly recommend it.

I saved myself some money by not buying the Nema 4 enclosure as this is being used on an indoor 2x72 belt grinder and the nema 1 is dust resistant and that should be sufficient. The instructions were easy to follow and made sure that you paid attention to what could happen if you didn't select the proper jumpers based on your input voltage and type of motor. Installation/setup took me around 30 minutes to complete, the only change I made was selecting the rpm x2 jumper as it appeared that my motor was not achieving sufficient rpm's the grind steel. So far so good, I've ground my first knife using the x2 rpm setting and my motor seems to working properly. Will update my review if anything changes.

Tied to a 1 hp (3600rpm) and sheaved for max lathe spindle speed around 1200rpm. Added reverse switch and remote start button, works great. I also purchased the same tied to a 3/4hp (3600rpm) for mill with max spindle speed around 1800rpm. With some creative thought and pulley combinations both work great.

Great product honestly. It's cheaper than having a phase converter always running in your shop. I installed one on my Bridgeport j head mill a year and a half ago and I haven't had a issue, even with taking deeper cuts than I probably should have. I also have one installed on my recent acquired walker turner bandsaw, and it works great! I know people complain about the forward/reverse switch that doesn't come standard. I wired my OEM Bridgeport switch to the box so I have forward/reverse.

The KBMA-24D was easy to install and had it running right out of the box! I ordered the reverse switch later and it was plug and play in the box. For a 1hp 3phase motor this works well. I have it wired up 120v so that I can plug it in to an extension cord until my 240 wiring is routed. Edit: Going on 3 years and this box is still working like the day I purchased it! I did rewire it to 220v at some point after my review, and it's been powering my Bridgeport milling machine flawlessly.