Papua New Guinea Green Non-Woven Stone Polishing Disc

Specifications

Green Non-Woven Stone Polishing Disc

Non-woven discs for angle grinders have three components: strong synthetic fiber mesh and quality abrasives, 

bonded together by a smear-resistant adhesive. Rapid Strip discs have anopen web construction that enables 

aggressive cutting action while maintaining a cool, non-loading surface. Rapid Blend discs have a unitized 

construction with varying weave – from open to tighter – for deburring and finishing. Rapid Prep discs have a 

more open weave that excels in surface preparation and clean-ing. Each product provides excellent cutting 

action while improving surface finish.

Why there?

• Deburring, blending and finishing with one product to

reduce the number of steps

• Provides a controlled, sustained finish                    

• Prevents undercutting and gouging                    

• Provides a cooler grinding action to lessen the chance                    

of warping or discoloration                    

• Ideal when loading is an issue, on fiberglass, adhesives                    

and soft metals                    

• For stripping coatings and paint off of hard materials like                    

concrete, cement, and stone                    

• Less vibration and quieter for high operator acceptance                    

• Provides an alternative to wire brushes

Components of Non-Woven Abrasives

 While non-wovens are made in a different way than conventional coated abrasives, both types of products 

use many of the same abrasive minerals. Silicon carbide is sharper, cuts faster, and produces finer scratch 

patterns on most surfaces. Aluminum oxide is more durable and tends to last longer. It is more aggressive 

on certain applications (such as hardened steel parts), and produces less discoloration on aluminum. 

When the non-woven supplier talks about grit, he is referring to the size of the abrasive grain impregnated 

into the nylon web. The lower the number, the larger the grains. The use of large particles (coarse grit) 

results in a more aggressive cut and a coarser finish. Small size particles result in a non-woven product 

that produces fine surface finish, if all other conditions are equal. In specifying a conventional bonded or 

coated abrasive product, the purchaser selects a specific grit size – say, 120 grit. With non-woven 

abrasives, by comparison, one of the following designations is used: 

Grit Designation and Comparable Grit Ranges

Coarse (C) 50 – 80

Medium (M) 100 – 150

Fine (F) 180 – 220

Very Fine (VF) 240 – 360

Ultra Fine (UF) 600

Micro Fine (SF) 1000 – 1200

Another term used in the specification that is probably unfamiliar to the buyer of conventional abrasives 

is density. This refers to the number of bonding agents and the amount of abrasive grain that has been 

compressed into the non-woven product. In general, harder density products cut faster, last longer, 

and produce finer finishes than softer density products. However, softer densities offer more 

conformability to the work surface and less tendency to load or burn the workpiece. Two other factors 

in the design and manufacture of non-woven abrasives are the sizing of the nylon fibers and the 

bonding agents used. Fiber size has a significant effect on the product’s cutting characteristics, 

while the type of waterproof resin used to bond the fibers together (and to anchor the abrasive to the 

web) can alter the characteristics of the product. The non-woven manufacturer selects the appropriate 

fiber size and bonding agent based on the intended application for the product; therefore, these 

components are not included in the product offering specifications.

A typical specification on a non-woven abrasive product might look like this: 8 A/O MED. The first 

symbol – in this example, the “8” – refers to the product’s density. This can range from 2 (open/most 

conformable) to 9 (densest/ most durable). The second symbol denotes the abrasive used. “A” or 

“A/O” refers to aluminum oxide, while “S” or “SC” stands for silicon carbide. The final designation – 

“MED” – denotes the grit size of the product, as outlined above.