MIG Welding Nozzles | Binzel Basics

*Addendums*

At 3:51, Matt calls the ring at the base of the nozzle an O-ring. Technically correct term is a tension band.
At 5:57 Matt references ABIROB A nozzles being single piece. It's actually ABIROB W and ROBO WH nozzles, which he is holding.
At 10:13 you might hear "pulls" gas, but Matt is saying "pools" gas

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You're going to see almost universally three different kinds of nozzle materials out in the market, either a brass nozzle, copper nozzle, or nickel plated nozzle, and the choice usually depends on your parameters and also your process. So, brass is going to be one of the more common nozzle materials you're going to see on the market. It has good spatter resistance at low parameters. Once you go up to higher parameters, you're going to see a brass nozzle start to lose a lot of its properties. If you get to a high enough parameter, you'll even notice to do brass nozzle will start to melt, or even shatter because it just can't withstand that much heat. If your going to take a step up in parameters, you're going to want to move up to a copper nozzle. Copper's going to be another really common material you see out there in the marketplace. Copper has higher thermal dissipation than brass. It works a lot better at higher parameters, and it also has better durability than a brass nozzle. If you're going to step up even further with your welding gun nozzle, look no further than going with nickel plated nozzles. Nickel plated nozzles are going to give you the best nozzle durability, and the least spatter adhesion of any other nozzle materials that you can choose. Nickle plated is always going to be plated to a copper nozzle, so you're going to get all of those really good durable copper nozzle properties, on top of even more spatter resistance because the nickel keeps the inside and the outside of the nozzle cooler, and while you were filler metal is passing through, that means you're going to get less spatter adhesion inside your nozzle and around your contact head. This is the same premise for why you water cooled consumables will adhere less spatter than air cooled consumables. Okay. So, moving on from materials. Let's talk about styles. So, with nozzle styles, you're going to be talking about a threaded style nozzle, or a slip-on style nozzle. This is a choice that you're going to make when you choose your gun in the first place. But, knowing the pros and cons of each will hopefully help you when you're looking at new equipment, or looking to get another gun in the future. Let's start with threaded nozzles. Threaded nozzles are going to give you a more secure connection on your MIG gun because of the threads. It'll also help seat your nozzle at the right place on your MIG gun every time because you're threading all the way through to the end. Threaded nozzles also help keep your consumables concentric, which is really important for gas flow. Also, threading won't allow any of your consumables to sit off center as a result. One of the downsides of a threaded nozzle is it can be difficult to replace if spatter binds inside the threads. One way to overcome that with the threaded nozzle is to use course threading with your nozzles, and that will allow you to unbind all that spatter, and replace your nozzle relatively easily. So, let's move on to slip-on style nozzles. That's the other style you're going to see. Slip-on style nozzles are really good for overhead applications, as well as applications that produce a lot of spatter. So, slip-on style nozzles are good because there's no threading, like with the threaded nozzle. When you're trying to take your nozzle out, it won't potentially get caught inside the threads, and rip off your diffuser or your contact tips. Simply just take a slip-on nozzle off, replace, and then start welding again. Another benefit of a slip-on style nozzle is they're typically going to be lower priced because slip-on style nozzles are single piece construction, as opposed to a threaded style nozzle which has more components machined into it in order to achieve that threading. Some of the drawbacks of slip-on style nozzles is because it's a slip on, it can sometimes cause your consumables to sit off center. Also, if it's not seated all the way back, you can experience gas loss, and as a result, experience porosity in your weld. Also, the O-ring. Sometimes the O-ring can fail in your slip-on style nozzle. That can cause your nozzle to just fall off while it's in operation.