Sand Blasting means:
Sandblasting is one of the most efficient ways to shape, strip, or smooth the surface of any metal. It is the same as rubbing something down with sandpaper, but it gives a more even surface, including in the nooks and crannies. Sandblasting is similar to high-octane sandpaper.
A sand-blasting setup normally has three different parts:
1) The Abrasive itself
2) An Air Compressor
3) A Blaster Nozzle.
It uses compressed air to send dust and sand towards an object to remove the oil, rust, and old paint. The shape and style of the sandblast particles will change based upon the size, shape, and metal of the object.
Shot Blasting means:
Shot blasting involves forcibly propelling a stream of abrasive material against a surface using high-pressure air through a nozzle.
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Shot blasting is commonly used to:
- Clean iron, steel, non-cast parts, forgings, etc.
- Clean mechanical sheets, rods, coils, wire, etc.
- Prepare surfaces to be painted, coated, etc.
- Shot peening to alter mechanical properties, increasing resistance to fatigue for springs, gears, etc.
Shot Blasting & Sand Blasting: What’s the Difference?
Sandblasting is typically a smoother and less invasive abrasion process. However, that also depends on the compressed air pressure you use and the abrasive media material you select. Because sandblasting is less forceful than shot blasting, it’s much more forgiving. With light pressure and soft media materials like organics or glass, you can treat very sensitive surfaces with little risk of accidental damage.
Sandblasting is the ideal solution for cleaning delicate electronic parts or connectors that have corroded. You have many media options with sandblasting such as aluminum oxide that cuts through surface contamination and leaves the undersurface clean but totally intact. For more abrasion with sandblasting, you can step up to silicon carbide as a medium without worrying about overdoing it.
Shotblasting has its place when you require deep abrasive penetration on denser materials. Where sandblasting might be too gentle and time-consuming for treating gears and shafts, shot blasting will quickly prepare thick and heavy surfaces like metal hulls and truck hubs.
Shotblasting lends itself well to coarse abrasion media like steel shot and steel grit. These are heavy-duty media materials that pound into a surface to loosen caked-on rust or baked-on pollution. You might have heard discussions about shot peening vs shot blasting. Peening is a metallurgical term for pounding metal to increase strength and durability. Shotblasting is actually a peening process used for tougher surfaces than what you’d treat by sandblasting.
