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Sand Blaster

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The sand blaster is a nifty tool for car repair and restoration jobs. This tool allows you to grind surfaces or even bore holes on automotive panels by blasting the damaged area with pressurized sand or any abrasive material. With the right abrasive material and nozzle type, you can use this tool to prep up a surface for painting or get rid of stubborn rust. This tool is basically sandpaper on steroids since you'll be using a blasting machine. Now once you've chosen a blaster, you'll need to select the right type of nozzle and tip. To help you figure out which one will provide the best results, here are the different nozzle types depending on bore shape and nozzle tips according to material:

Sand blaster nozzle types according to bore shape

The bore shape of a nozzle determines its blast pattern. And the right blast pattern will depend on your auto repair or restoration need. Basically, you have two choices in terms of bore shape:

Venturi . A venturi nozzle is perfect if you need to create a wide blast pattern and you need to increase the abrasive velocity but as much as 100% with just a flick of a switch. Because of its wide blast pattern, this type is best used on large automotive surfaces that require a thorough paint or rust removal.

Straight bore . This type produces a tight blast pattern, making it an ideal nozzle for spot blasting projects. For spot cleaning or when removing small, rusty spots, use a straight bore nozzle. This type is designed for lighter sandblasting jobs and smaller surfaces.

Sand blaster nozzle according to material

Aside from the bore size, you'll also need to consider the nozzle material. Because this component is frequently exposed to pressurized abrasives, it's the part that usually breaks down first. That's why you have to choose the right nozzle material for the right job.

Alumina (aluminum oxide) . Perfect for lightweight jobs, this material is for low-pressure applications. If you want a very affordable nozzle for once-in-a-blue-moon sandblasting jobs, this nozzle material is a good choice.

Steel . A steel nozzle, when used with a hard abrasive, can wear out really fast. This is why it's best used on light sandblasting jobs on smaller surfaces.

Ceramic . The most common nozzle tip used, it's cheap and is actually longer-lasting than a steel tip.

Carbide . The most durable type, a carbide tip or nozzle is best used with hard abrasives such as aluminum oxide and silicon carbide. Because this tip is the most wear resistant, it's the most cost-effective option, especially if you do plenty of sandblasting jobs. This one is available in three subtypes: boron carbide, silicon carbide, and tungsten carbide. Boron carbide is perfect for heavy-duty projects and hard abrasives. For a lightweight yet highly durable tip, opt for a silicon carbide. As for tungsten carbide, it's perfect for coal slag and mineral abrasives.

Other tips:

  • When choosing a nozzle, keep in mind the type of sand blaster you have and the kind of abrasive you'll be using. The harder an abrasive is, the more it'll easily wear out the nozzle.
  • Specially built angle nozzles are also available for those hard-to-reach areas.