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Common Types of Abrasive Discs & Top-notch Suppliers

Abrasive discs consist of abrasive grains adhered onto a backing of cloth, fiber, film, paper, non-woven, etc. These units are then mounted on a sander, grinder or similar tool and used in sanding, grinding, polishing applications.

From: www.globalspec.comDate: 2014-12-17 08:55:11Views: 798

What are Abrasive Discs?

abrasive discs

Abrasive discs consist of abrasive grains adhered onto a backing of cloth, fiber, film, paper, non-woven, or other material. These units are then mounted on a sander, grinder or similar tool and used in a variety of sanding, grinding, polishing and surface preparation applications. One of the most common uses of abrasive discs is in sanding applications.  Such discs remove surface materials such as metal, ceramics, glass, plastics, and paint, as well as burrs and other imperfections. Depending on their construction, nonwoven surface conditioning discs can be used in wet and dry grinding, sanding, cleaning, polishing, and surface preparation applications in a variety of industries, including metalworking, woodworking, ceramics, and even semiconductor manufacturing.

Common Types

Aluminum Oxide Sanding Discs

Aluminum Oxide Sanding Discs

Aluminum oxide is a popular abrasive, known for its hardness and strength and low cost when compared to other abrasive types. It has low heat retention and low specific heat making it useful in a wide array of grinding and sanding applications. Aluminum oxide occurs naturally in the form of the mineral corundum, but the mineral is not used as a commercial abrasive except as a component of emery. When combined with emery and/or crocus it produces an abrasive suitable for finishing applications.

Aluminum oxide is often fused with chemical additions to titanium oxide or chromium oxide to enhance its abrasive uses. The various types of fused aluminum oxides are distinguished by the levels of chemical impurities remaining in the fused mineral. Titanium oxide additions can toughen the abrasive and enable further performance enhancement by grain heat treating processes. Calcined or platelet alumina as used in fine grit or polishing applications. While most sol-gel abrasives are aluminum based, these alumina abrasives are classified as ceramic abrasives. Ceramic abrasives represent the next generation of abrasives. They are becoming popular in metalworking applications because they grind cooler and faster compared to fused aluminum oxides.  Due to its specialized crystalline structure, sol-gel abrasives "self-sharpen" allowing for a long functional lifespan.

Silicon Carbide Sanding Discs

Silicon Carbide Sanding Discs

Silicon carbide (SiC) is a widely used abrasive due to its durability and low cost. It is a synthetic abrasive first developed in the late 1800s.  SiC is harder than aluminum oxide, but more friable than fused aluminum oxide grains. Since silicon and carbon are both soluble in steel, silicon carbide is not a effective in grinding steel or ferrous alloys - especially with coarser grit sizes in heavy metal removal applications. Silicon carbide is typically used in applications involving nonferrous metals such as brass, aluminum and titanium, and for abrading non-metals such as the stone, glass, wood, and leather. 

Superabrasive Discs

Superabrasive Discs

Superabrasive disc types include diamond and cubic boron nitride (CBN).  Superabrasive diamonds have the highest known hardness of all abrasive grains.  They are used for grinding and sanding nonferrous metals, ceramics, glass, stone, and building materials. Diamond abrasive discs are not useful in grinding steel or ferrous alloys because the carbon in diamond readily dissolves or reacts with iron. However, diamond pastes are useful in ferrous polishing or lapping applications where heat and reactivity are not a factor. When working with ferrous metals, CBN is a better choice. Cubic boron nitride is not as hard as diamond.

Other types of grains include ceramics, garnet, tungsten carbide, and alumina-zirconia abrasives. Some of the top-notch suppliers of abrasive discs in China include Shanghai Fermi Abrasives Co., Ltd., Dongguan Fengrui Emery Cloth Factory, Zhengzhou Bosdi Abrasives Co., Ltd., AVIC Tianshui New & High Abrasives Co., Ltd., CIPIE(Henan)Import and Export Trade Co., Ltd., just to name a few. Click here to browse more superior suppliers of all types of abrasive discs on iAbrasive.com.

 

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