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Selecting the Right Grinding Wheel for Your Application

Grinding wheels are often referred to as bonded abrasives.There are many kinds of grinding wheels. How to choose a suitable grinding wheel is determined by factors such as material, particle size and hardness. According to the different bonding agents, we are divided into :

  • Vitrified bonded abrasives
  • Resin bonded abrasives
  • Rubber bonded abrasives.

Grinding wheel is one of the abrasive tools with the largest amount and the most widely used surface. It rotates at high speed during use and can perform rough grinding, semi-finishing and grinding on the outer circle, inner circle, plane and various profiles of metal or non-metal workpieces. Fine grinding as well as grooving and cutting, etc.

ABRASIVES: There are many types of abrasive grains available for grinding discs. Today i will mainly introduce four types to you. Each type has unique properties when it comes to hardness, strength, fracture toughness and resistance to impact. The choice of the abrasive is inevitably related to the material of the workpiece.

Aluminum Oxide: Aluminum Oxide is the most common abrasive used in grinding wheels. It is generally recommended for grinding materials like stainless steel and tool steels, but it can also be used on some high tensile aluminum and bronze alloys.

Silicon Carbide: Harder than standard aluminum oxide with a very sharp abrasive grain, it is often used for grinding gray iron, chilled iron, brass, soft bronze and aluminum, as well as stone, rubber and other non-ferrous materials.

Zirconia Alumina: For use in rough grinding applications where high stock removal is required. This grain is associated with high-tech resin bonds.

Ceramic Aluminum Oxide: Often referred to as just “Ceramic”, this is the most modern type of abrasive. This ceramic grain has a unique microcrystalline structure that is self-sharpening. This abrasive is exceptionally hard and strong. It is primarily used for precision grinding in demanding applications on steels and alloys that are the most difficult to grind.

GRIT: As we mentioned above, grit is related to the size of the abrasive grains distributed on the wheel. The larger the particle size, the finer the abrasive. Basic descriptions of abrasive types range from coarse to medium to fine.

Hardness: Usually, when grinding hard workpieces, the contact surface between the grinding wheel and the workpiece is large or the grinding pressure is large, the grinding wheel with slightly softer hardness is used for high-speed grinding, and the hardness is used when grinding softer workpieces with poor thermal conductivity.

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