Flap discs, also known as flap wheels and elastic grinding discs, are made of plastic, fiber mesh covers, etc. bonded with sandpaper sheets, and are a type of coated abrasives.
Flap discs are suitable for grinding welds in boxes and burrs of stamped parts, and for grinding and polishing various stainless steel and carbon steel structural parts.
However, the performance of flap discs is not uniform.
So, what are the factors that determine the performance of the flap disc?
01 Abrasives
Abrasives are important raw materials for manufacturing grinding wheels, and are mainly responsible for cutting. Therefore, abrasives must be sharp and have high hardness, good heat resistance and stable toughness.
02 Grain size
Granularity refers to the coarseness and fineness of the abrasive particle size. Grain size is divided into two categories: abrasive grains and micro powders.
① Abrasives with a particle size greater than 40μm are called abrasive grains;
② Abrasives with a particle size less than 40μm are called micro powders.
Generally speaking, the finer the abrasive grain size, the better the grinding surface roughness.
03 Binders
The substance used to bond abrasives in the grinding wheel is called a binder. The strength, impact resistance, heat resistance and corrosion resistance of the grinding wheel depend to a large extent on the performance of the binder.
04 Hardness
The hardness of the flap disc refers to the difficulty of its abrasive grains falling off under the action of grinding force. The hardness of the flap disc is soft, and the abrasive grains are easy to fall off; the hardness is hard, and the abrasive grains are difficult to fall off.
The hardness of the flap disc and the hardness of the abrasive are two different concepts.
As a grinding and polishing tool, flap discs have brought great convenience to industrial manufacturing. Currently, the market consumption of flap discs is still huge, and it is expected to continue to rise every year in the future.
