Coated abrasives are made by bonding an abrasive grain to a backing material using a make coat of resin.  A second coat (size coat) of resin, and sometimes even an additional coat (top size coat), is applied.  After curing in an oven, the material is converted into various types of abrasive products including sheets, discs, fiber discs, rolls, belts, flap discs and flap wheels.

ARC’s coated abrasives are used in an extensive range of applications from grinding and deburring to surface prep and finishing.

 

ALUMINUM OXIDE (AO)

Fused aluminum oxide is the most common abrasive grain in use today. AO is tough and durable, with no clearly defined crystal structure. As the grain wears, it produces rounded edges reducing cutting power. Brown aluminum oxide is the usual grain for coated abrasives products but its also available in white, pink and other variants.

ZIRCONIA ALUMINA (ZA)

zirconia alumina grain

Zirconia alumina is an alloy of aluminum oxide and zirconia with a crystalline structure. Under heat and/or pressure, the structure fractures producing a new cutting edge and longer cutting life.

COMPACT GRAIN

compact grain

Individual grains are clustered together to form a larger grain shape. This type of construction provides extended life compared to conventional abrasives. Compact grain is ideal for finishing applications on any metal in belt, PSA and quick-lok disc form.

SILICON CARBIDE

silicon carbide grain

Silicon carbide is the hardest of all common abrasive materials. It is sharp, but friable, making it fast cutting, but short lived. It is ideal for use on non-ferrous metals like aluminum, brass, bronze, magnesium and titanium. For final finishing, the sharp crystal structure produces fine, straight edged grind lines that reflect light better than the rounded aluminum oxide grind lines.

CERAMIC

ceramic grain

Ceramic aluminum oxides are formed via a chemical process. The grain consists of millions of smaller crystals, which fracture off during use and continuously form a new cutting surface. This self-sharpening process requires heavy pressure to ensure that the grains do not glaze.

NONWOVEN

Non-woven abrasives feature a flexible, 3-D webbing embedded with abrasive grain. As a non-woven product glides over a contoured surface, the webbing compresses and expands, allowing the grains to reach the entire surface.  Non-woven products are less likely to damage a work piece, and can provide a uniform finish to contoured surfaces without compromising critical tolerances. This is especially important during a finishing process.

The conventional method for removing deep scratches involves using a progression of coated abrasives, e.g. 80, 120 and 180 grit, each providing a progressively finer finish. The conforming nature of non-woven abrasives removes scratches while providing a fine, uniform finish. This reduces the number of steps needed in the process and provides a major savings in labor costs.  In addition, the open structure of a non-woven repels loading and their synthetic components are waterproof and resistant to metalworking chemicals.

Z-WEB represents ARC’s family of high performing 3-D products used for finishing, light grinding and masking applications on materials such as Stainless Steel, Titanium and Exotic Alloys.  Z -WEB products deliver a consistent and efficient final finish without damage due to excess stock removal, overheating or smearing.

SURFACE CONDITIONING

Surface conditioning is usually performed near the end of a manufacturing process and refers to changing a product's surface without damage to its base material.  

ARC's surface conditioning materials (SCM) feature all the benefits of a non-woven structure with one-sided scrim reinforcement.  The addition of scrim adds strength to discs and belts used in high speed operations.

ARC's surface conditioning products include Z-WEB discs and belts whose open 3-D structure resists loading and delivers long lasting performance with a uniform scratch pattern.

surface conditioning quick lok disc
cleaning finishing disc

Cleaning & Finishing

Non-reinforced, or clean and finish (C&F) products are made of a non-woven base without a woven scrim and are typically hand-operated products.   Their open web construction resists loading and may be rinsed clean and used repeatedly. ARC's clean & finish products are designed for general purpose cleaning, prepping and finishing and are offered in a variety of grades and sizes. They include hand pads, sheets, rolls and flap wheels.

Unitized

Unitized wheels feature a three-dimensional non-woven web design, where layers of non-woven fibers are filled with abrasive grain and resin then compressed and cured.  Unitized wheels are bi-directional, and often used on portable tools or stationary grinding machines.

Available in a variety of densities and grades, our Z-WEB unitized wheels are an excellent choice for a wide range of applications in deburring, polishing and finishing.

Z-WEB unitized wheels deliver high quality, long lasting performance with consistent final finishes.

unitized depressed center