This is the most common powder gun for smaller shops. It holds a fixed amount of powder in the hopper. Is it fed through an auger to the tip of the gun, where it is atomized and applied to your project. A box-fed/gravity feed gun has an adjustable nozzle that goes from 0 – about 50 degrees up to about 90 degrees. The choices are infinite in between that for how much powder gets atomized and applied to your project.
Box-fed guns are referred to as ‘compact’ powder guns, which means it is small (and also less expensive) than the larger, heavy duty fully automatic gun . This kind of anodized finger print resistant gun is perfect for small to medium-sized jobs and it’s less expensive than the larger guns.
The box-fed powder gun does not atomize, or spray as well as a siphon fed/gravity feed gun which means you need to apply the powder more evenly and with less pressure than you would on a siphon fed gun.
Be careful with the box-fed gun because it cannot spray as much powder. It’s just what it is, and this requires that you apply the powder more evenly and with less pressure than a siphon fed gun. The best way to use a box-fed gun is to start low and work your way up until you get a feel for how it works.
Don’t get in a hurry when you’re changing tips on a box-fed gun. You can quickly cuss out the tip and then the spring that is supposed to push it into place if you do not read about how these guns work before taking them apart!
Box fed guns come with two small springs, and and adjustment and anti-clog allen wrench, and directions for adjusting the gun. They also come with three different tips, one fine atomizing tip that is perfect for applying black powder coatings on parts that need to be painted after they are powder coated (which is most everything), a medium sized tip great for larger parts such as wheels and fenders, and a large tip for medium sized parts such as bumpers.
The gun comes with three different tips: fine (black powder), med (red/white powder) and large (blue/green powder). A center adjustment screw controls how much powder is sprayed from the collet. Less pressure = more atomization; vice versa. The bottom portion of the gun holds the powder.
The nozzle diameter is directly proportional to how much powder will be sprayed onto your part(s). The smaller nozzles spread less than larger ones so keep that in mind when selecting a tip size.
The important things to remember when using this kind of gun are: use low pressure, take your time and have fun! It’s a powder coating gun, not a power washer!
The gun is lightweight and well balanced. The handle is ergonomically designed for a comfortable grip. The box-fed gun uses an adjustable tip so you can adjust how much powder gets atomized. You do this by turning the center adjustment screw.
The gun has three different adjustable tips for different sized parts that need powder coating, plus one black finishing tip that is used for painting parts once they are done being powder coated (for example, wheels and fenders). The tips simply twist onto the end of the gun. It’s very easy to replace them.
We hope these tips will help you operate you box-fed powder coating gun.
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