Thermal Dynamics Cutmaster 42 Plasma Cutter Review

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The Cutmaster 42 is designed to cut metals like aluminium, steel, brass, and copper using a jet of hot plasma. This is the tool that does the job whether you’re running on 120-volt or 230-volt power supply and whether you’re working with 25 or 40 amps of power. The truth is, you don’t need anything more than this machine because it’s designed to provide reliable cutting capacity. The Thermal Dynamics Cutmaster 42 has a maximum cutting capacity of 5/8 inch. That means it can cut 1/4-inch thick metals any time of the day. 

Plasma cutting is an essential aspect of automotive, plumbing, roofing, and HVAC system repair and construction. But you don’t have to be working at a metal building shop to make use of a plasma cutter. A DIY technician working in his garage will find the Cutmaster 42 handy because of its usefulness, versatility, and portability. It isn’t just one of the more affordable plasma cutters in the market but also one of the most portable, measuring 9” x 7” x 18.5”. Possibly the most portable plasma cutting machine in the market, it only weighs about 26 pounds.   


This tool has a number of remarkable features, one of which is the autopilot restart technology that allows it to reignite fast — no long refractory periods. In addition, you can see the status of the machine on the front panel LED. Needless to say, you can run this machine with a smaller compressor. This is the lightweight tool with a robust stamina. It can work all day long. 

Considered user-friendly by technicians, the Cutmaster 42 comes with a 75-degree head and 15-feet leads. This plasma cutter also comes with a built-in compressor and a quick-disconnect torch. User-friendly tools allow more productivity and efficiency. If you’re carrying this machine outdoors or in the field, you need at least a 3800-watt generator. But you’re better off on a 4000-watt generator. 

Take note, however, that the Cutmaster 42 doesn’t come with an air filter, so you have to buy one. Without an air filter, contaminants can get into the system and reduce the lifespan of your consumables.

The 15-foot SL40 Torch works well with expanded metal, but again remember that it doesn’t have a built-in air filter and gouging capabilities. However, if you’re buying a unit with the SL60 1Torch, then the torch offers gouging capabilities. If you’re using a pancake compressor, keep in mind that the machine needs an air compressor capable of generating 3.2 cubic feet per meter at 75 psi. 

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Thermal Dynamics Cutmaster 42 Plasma Cutter

Ease of Use 

Not only is the Thermal Dynamics Cutmaster 42 Plasma Cutter affordable. It’s also one of the easiest to use. One of the good things about Cutmaster 42 is its ability to make precise cuts on thin gauge metal, which makes it perfect for a number of metal fabrication and automotive applications. Aside from being able to make precise cuts, it also makes clean, slag-free cuts. Not to mention, it cuts fast. 

One issue users have is the torch turns off while cutting is in progress. If the plasma torch keeps shutting off, make sure you’re not moving too fast. You can cut 18 inches per minute on 1/4-inch steel with the Cutmaster 42. In comparison, the average plasma cutting time is 10 inches per minute. Another reason the torch keeps turning off while you’re cutting is because you’re cutting a sheet of metal that’s too thick. 

If you’re wondering whether you need an air dryer, you most likely do. But the dryer you need depends on your work environment. If you live in places with an arid climate, you need cheap dryers. Expensive, heavy-duty dryers work well in humid climates. 

Vent2Shield Technology 

You can use a small compressor for the Thermal Dynamics Cutmaster 42, unlike other plasma cutters. Thanks to its Vent2Shield (V2S) technnology. This becomes really convenient when you have to transport the equipment and travel light. A smaller compressor makes the pair lightweight, but the convenience doesn’t come with diminished performance. 

Budget-friendly But Durable 

Priced like 1/4” plasma cutters but with the capability of 5/8” plasma cutters, the Cutmaster 42 proves to be the cost-effective option. It’s more versatile than portable plasma cutters in its class. 

You might worry about its quality. After all, affordable tools don’t tend to last longer than their expensive counterparts. That’s not the case with this machine, however. Feel secure with its 4-year warranty. It’s from Victor Technologies, the leading welders supply company in the world. Hence, the Cutmaster 42 stands the test of time, as all its brothers in the Thermal Dynamics line do. You get a lot for the price you pay for this durable and powerful machine. 


Thermal Dynamics Cutmaster 42 Plasma Cutter is the perfect companion if you’re looking for a quality, portable, and versatile plasma cutter. It gives you cuts as clean and good as its expensive counterparts. The unit includes a set of consumables, which are inexpensive and available anywhere, as well as safety gloves, glasses, and power plug adapters. The dual voltage, auto pressure regulation, and easy setup make this machine great for beginners and pros alike. This is the ideal portable plasma cutter for DIY or professional automotive and marine mechanics, plumbers, HVAC technicians, and roofers. 

Thermal Dynamics Cutmaster 42 Plasma Cutter

If you are looking for more alternatives, you will enjoy reading our homepage which has a comprehensive plasma cutter guide that will help you to find the best machine for your personal needs.

Sam Cobb

Sam Cobb

Chief Editor

Hi everyone, my name is Samuel but all of my friends call me Sam. I have been a very hands on person ever since I was a kid. Back in those days I was more interested in wood work and have always been a very keen gardener. I find physical projects very rewarding and love having something practical that I can use that I have made with my own hands.

As I have progressed with my DIY skill set I have focused more and more on working with metal. Now my favorite projects are combining my metal working skills with my wood working skills.

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