A Complete Guide To Coated Abrasives, Types and Components
The surface-treatment tasks involve deburring, blending, grinding, polishing, finishing, dimensioning, patterning, or shaping a metal workpiece. There's a coated-abrasive product available to urge the work done. The products include belts, rolls, sheets, pads and flap discs, and wheels.
What is Coated Abrasive?
The coated-abrasive name derives from one layer of abrasive grains being coated or deposited onto a versatile or semi rigid backing material using an adhesive, like resin bond the grains to the backing material. This text examines the coating process, various sorts of grains, man-made minerals, and backing materials for coated-abrasive products for several metalworking applications.
A coated abrasive may be a product that consists of a skinny layer of abrasive grain attached to a substrate like paper, cloth, etc. Coated abrasives are available through forms like Sheets, Discs, rolls, Specialties, or Belts.
What are the Components of Coated Abrasives?
Following are the Components of Coated Abrasives:
Abrasive Grains
Coated abrasives are developed using abrasive grains. The foremost common abrasive grains are alumina, zirconium, ceramic, carbide, and garnet.
The grains are crushed and separated into sizes that are grit sizes, using calibrated screens. Grit size ranges from 12 (very coarse) to 1200 (very fine). Once the grains are separated into sizes, they're attached to a backing material using various bond techniques.
Below are descriptions of the foremost common abrasive grains:
Ceramic
It is a high performance, man-made abrasive, which is a very uniform, high-density grain structure. Ceramic is extremely durable and self-sharpening for extended life and a more relaxed cut. Excels on tough to grind materials.Aluminum Oxide
It is a challenging, blocky shaped, man-made grain used for top speed grinding and finishing metals, wood, and other high-lasting materials without excessive fracturing or shedding. The power to resist fracturing is that the primary consideration, alumina, will outperform all other coated abrasive grains.
Zirconium
Zirconium is an excellent, dense, man-made crystalline grain used for aggressive stock removal. Zirconium may be a very thick material with a singular self-sharpening characteristic, which provides its long life on massive stock removal operations.
Silicon Carbide
It is a rigid, very sharp, man-made abrasive fitted to non-ferrous materials and non-metallic materials like concrete, marble, and glass. A friable grain, carbide cuts faster under light pressure than the other grain utilized in coated abrasives.
Garnet
Garnet is formed of natural alumina, which may be a relatively strong but fragile bonding structure. Very inconsistent in comparison to synthetics. It's used primarily in woodworking as garnet dulls too quickly to be utilized in metalworking.
Types of Backing Materials
There are basically four types of backing materials used for the cleaning, polishing, or blending process. Let's see the list of types of backing materials are given below:
- Paper
- Cloth Backings
- Fiber Backing
- Combination Backing
- Other Backing Materials
Read: Types of Backing Materials
