Media blasting cabinet for sale

Media blasting cabinet for sale DEFAULT

Introduction: Benchtop Media Blasting Cabinet

Recently, during the boredom of a northern winter, I restored a 70 year old Craftsman Drill Press. I used wire wheels on various drill motors, bench grinders and angle grinders with decent results, but it was a tedious process. My next project is a Bandsaw from the 1940's. It has many internal cavities in the casting that just can't be reached easily with wire wheels, so I considered media blasting. I shopped around, looking at blasting cabinets for sale and found the least expensive one to be $105.00. Me being on the cheap side, I decided to build one myself. The store bought units was only 30" wide. I needed to have 42" of width to blast the parts for my bandsaw. I built a bench top version because I only plan on using it on occasion. It will be stored on a shelf most of the time.

Step 1: Cutting the Cabinet Panels

I will start by saying that I had no plan or drawing for this project. Like many of my projects , I figure them out as I go along. Since this is a bench top version, I did not have the space (height) to build a funnel shaped hopper floor, so I built the floor of the cabinet to slope towards one end of the cabinet for abrasive removal. I decided to use 3/4" plywood for the ends of the cabinet so that the front, back and top panels could be fastened to the ends. The rest of the panels are 3/8" plywood , in a effort to keep the overall weight down. I cut the end pieces 20" wide by 25" tall with an angle on the front side close to 45 degrees. The back panel is 43-1/2" wide by 25" tall. The front panel is 43-1/2" wide by 15" tall. Both front and back panels have a 3/4" x 3/4" x 44-1/4" cleat fastened to the inside bottom at an angle. I measured up 5" from the bottom edge of the panel on one end and up 2" from the bottom of the opposite end to come up with the desired angle. Then I glued and nailed the cleats in place, they slope towards the end of the cabinet that will have the door. The door will be cut out of one of the end pieces later in the build.

Step 2: Assembling the Cabinet

I started the cabinet assembly process by ripping angles on 2" x2" boards that matched the angles on the end panels, then screwed them with 1-5/8" drywall screws ,making sure to drill pilot holes first . Again I will add, I did not pre-engineer this cabinet. I did not cut the end panel angles to any specific angle rather I used what looked good and provided an ample amount of visibility into the box. When I ripped the boards, I simply transferred the angles from the end panels to the 2x2's, then set the blade angle on my table saw to match. Some things are just easier this way, no need to over think things sometimes.

Next, I glued and screwed the back and front and top panels onto the end panels. I also added 3/4" x 3/4" cleats to the inside of the end panels to support the floor as well. I cut the floor panel to 20" x 43-1/4" and fastened it in place.

Step 3: Fitting the Window

  • For the viewing window I used a 14" x 30" x .100 thick piece of clear acrylic. I installed 2"x2" cross members to support the ends of the window panel. I spaced them 30" on center. Then I used a small trim router and milled out a 3/4" wide slot, .100 deep, around the inside perimeter of the window cavity to allow the window panel to lay flush with the 2x2 surround wood. The window is sandwiched in place with plywood strips. I used 7-1/2" x 14-1/4" pieces of plywood on the right and left sides of window and 2, 1-3/4" x 28-1/2" plywood strips for the top and bottom of the window. I waited to install the window until the inside was painted, to make for easier painting.

Step 4: Creating Armholes

To create armhole gaskets I used a pair of 4-1/2" toilet flanges with a seperate metal outer ring. This outer ring is cool because it allows the plastic flange to rotate inside the metal ring. I traced holes 16" on center and cut them out with a jigsaw. The flanges are mounted from the inside of the cabinet, with only the plastic inserts protruding through the front. After a test run with my arms I decided the holes needed to be higher up in the enclosure. I re-cut the holes as high up the front of the cabinet as I could, then cut new holes in a couple of strips of plywood to cover the old holes. Viola! It almost looks like its a design accent. *Remember, " its only a mistake if you cant work past it".. This is one of the downfalls of designing on the fly.

Step 5: Creating a Door

To make a door for the cabinet I laid out lines parallel to the perimeter of the end panels, about 1-1/2" inside of the edges to maintain structural integrity. I then stood the cabinet on end , climbed on a stool and cut the door out using a circular saw and a jigsaw. Next I installed door stop around the perimeter of the door opening so the door will have something to rest against while closed. Then I placed the door in position , with a small shim under the bottom edge to maintain the proper spacing, and installed the hinges and latch. After the interior of the cabinet was painted, I installed 1/2" wide , self sticking weather strip to the door stops to provide a tight seal

Step 6: Vacuum Connection

I choose to install a vacuum line to keep the dust down inside the cabinet and help prevent abrasive leaks to the outside. I am using a small shop-vac with a 1-1/4" diameter hose end fitting (pipe). Looking through my collection of plumbing fittings I found the perfect solution. I used a 1-1/4" tailpiece connector which is normally used on a sink drain . The vacuum cleaner pipe fit inside the nylon gasket perfectly. The fitting I had was made to fit inside of a 1-1/2" schedule 40 pipe fitting ( ie. an elbow , tee etc) . In order to hold the fitting in place inside the cabinet, I cut the outer hub off a 1-1/2" reducer bushing. This left a plastic ring that I glued in place on the section of the fitting that stuck out inside the cabinet with PVC cement .

Step 7: Finishing Up

First I primed the inside of the cabinet with a latex wood primer. Then I used latex caulk to seal along all the joints and seams before applying the final coat of paint. I welded up a floor grate out of a bunch of 3/16" diameter steel rods. It rests on a couple of 1" wood blocks at the low end of the sloped floor , door end, to allow the grate to set level above the collecting abrasive. I drilled a 1" hole in the opposite end of the cabinet to accommodate the air hose and abrasive feed line. I bought some awesome gloves at Harbor freight for $7 . They reach all the way up to my shoulders. They have elastic cuffs on the end which wrap tightly around the armhole flanges, no clamps needed. I also installed a LED strip light inside on the ceiling of the cabinet. I placed it inside a clear poly-carbonate tube used to cover fluorescent light bulbs for protection.

Step 8: Conclusion

In conclusion I must say that this project has been a success. The vacuum line works very well to keep all the dust under control. The gloves are plenty long enough to reach all areas of the cabinet. I can usually blast for about 45 minutes before its time to open the door and clean out the abrasive. This is an easy task, using the vacuum to suck it out , then emptying the vacuum back into the abrasive reservoir. I also added a few pieces of scrap tin under the grate to act as a backstop for the blasting

I was able to build this cabinet with very little investment. I did not have to purchase any lumber , as I had left over scraps from previous projects. I spent $15 on the clear acrylic window , $10 for the toilet flanges, $5 on the hinges and latch, $3 on weather stripping and $7 on the long gloves...So for about $40 I have a custom sized blasting cabinet that not only saved me a bunch of money, but was a fun project to build..

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Types of Blasting Systems

Whether you’re searching a sandblasting cabinet for your shop or for your personal garage, there are several things to consider before purchasing this important industrial tool.

Sand blaster cabinets, also known as media blast cabinets or abrasive blasting cabinets, are metal boxes with openings, windows, and attached gloves which allow you to use sand or another abrasive media form, to smooth rough surfaces, remove imperfections in metal, and scrap of old paint or rust.

Yet, while all sandblast cabinets are made for the same general purposes, there are many different specifications.

Types of Sand Blasting Equipment

Sand blasting machines are made in a few different styles: standard, split-level, and portable. While all three styles operate in similar fashion and can use various types of blasting media, there are significant differences to each. Choosing which style will work best for you depends on how often you want to use your sand blaster and for what purposes.

Standard

These fixed cabinet blasters have openings in the front and on both sides of the machine. They’re great for working on small to medium sized objects.

Split-level

Split-level blaster cabinets are also fixed and have a hatch top that opens upward on a hinge to create a larger work space. These cabinets are useful when working on larger or heavier objects.

Portable

Portable sand blaster cabinets, sometimes called mini sand blasters, are perfect for working with smaller or more delicate objects because they allow your to make more detailed alterations. And, of course, benchtop sandblast cabinets are completely movable, making jobs outside of your workshop or garage possible. They offer remote control operation and are usually more inexpensive than other types of sandblaster cabinets for sale.

Once you’ve chosen the best sandblasting equipment style for your needs, the next decision you should make is whether you want to use a siphon cabinet or a direct pressure cabinet.

The question here is how you want your machine deliver your abrasive media to the blasting nozzle.

Siphon Blasting Cabinets

Siphon cabinets, also known as suction cabinets, are best for light to occasion use, general cleaning and light production jobs. They use a gun to pull abrasive media into your blasting nozzle where it is then shot from the end of the nozzle. This requires the use of more air pressure than direct pressure cabinets because the delivery is a two-step process.

However, these systems are easier to use and install and are generally less expensive than direct pressure cabinets.

Direct Pressure Cabinets

These machines can expel abrasive media at a higher blasting flow rate than siphon blasting cabinets can because, unlike the siphon delivery, this system pushes the abrasive media out directly, making completing your jobs on average much faster. The direct pressure cabinets also allow you to lower and raise the pressure to customize the flow rate for each job you do.

Aside from these choices, there are other considerations too. Media blast cabinet details varies with each model and some have better features than others.

Here are some helpful tips and warnings to guide you through the details and specs of the blasting machines you’re considering.

Doors

If you’re buying a standard cabinet, make sure you know what material the cabinet doors are made of. Avoid cabinet blaster machines with plastic doors, which can warp and bow out easily and could lead to machine malfunction.

Air Compressors

Some Sandblast cabinets are sold with their own air compressor unit; however, not all are. If you’re thinking about purchasing a sandblast cabinet without an included air compressor, make sure to check the required PSI and CFM for your new sandblast cabinet to check if it with work with your current air compressor.

Construction

The metal used for frame and body construction also impacts the quality and durability of your sandblasting cabinet. While machines with lighter steel bodies are cheaper and work fairly well for occasional use, if you’re planning on using your blasting cabinet on a regular basis, you will need to invest in a machine with a sturdier construction, such as heavy gauge steel.

Lighting

Some cabinet blasters come with interior lighting. While this is not always necessary for daily use, if you want extra, focused lighting to help you in your detailed work, a sandblast cabinet with an interior light is ideal.

Assembly

Another, more humdrum consideration is whether the cabinet you’re purchasing is fully constructed or will require assembly. Sand blasting cabinets may require hours of assembly and the assembly could be quite complex, especially if you have no prior knowledge of how these machines are built and work.

So, once you’ve decided on the types of sandblasting cabinets and systems and thought about the specific features you want, you can start shopping the sandblasting machines for sale.

Before deciding on which type of sandblasting cabinet to purchase, you should ask yourself these questions to help you narrow your search and ensure you find the sand blasting machine that fits your needs:

· What do I want to use my sandblasting cabinet for?

· How often do I want to use my sandblasting cabinet?

· What is my price range?

· Where am I going to use my sandblasting cabinet?

Knowing the answers to these questions will greatly reduce the time you spend deciding between different sand blasting machines.

In the end, the perfect sandblasting cabinet for you is out there. You just need to think about what features, styles, and specification will work best for what you want to use your sand blast cabinet for!

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