Grinding wheel
The i. d. Usually synthetic resin-bonded grinding wheel is intended for processing metal or stone . In contrast to the cutting disc , the grinding disc is designed for rough grinding and is not suitable for cutting materials. Cutting with grinding disks is very time-consuming. The large cutting width creates high temperatures, the disc burns and loses its cutting effect. The resulting stronger pressure can ultimately break the disc. Pieces of glass flying around can injure the user and people nearby.
use
To achieve optimal economic results, the appropriate disc is required for each material , because the abrasive grain and the bond are matched to the material (metal / stone). Users who z. B. edit more than just one material often use universal discs. These discs still offer good grinding results and significantly reduce storage costs.
In order for the grinding disks to withstand centrifugal forces and loads , the manufacturer must comply with the safety standards that are regulated in the EN 12413 standards. The user of a grinding wheel must be able to handle it in accordance with this standard and be familiar with the manufacturer's safety instructions. Manufacturers are obliged to use their products according to the above. Establish and test the standard. There is no state control of the manufacturers.
Well-known manufacturers have committed to complying with these standards and founded the “control body” oSa. When applying for membership, the oSa checks whether the applicant has the necessary machines for self-testing. In addition, the products of the member companies are regularly checked at random. In the event of violations, the use of the oSa logo is prohibited and U. membership revoked.
The use of damaged, incorrectly clamped or incorrectly inserted grinding discs can result in serious injuries.
Structure of a grinding wheel
As a rule, the grinding grains of the grinding wheel consist of silicon carbide , various corundums or aluminum oxide , which is processed in the grinding wheel in different grain sizes. In contrast to the cutting wheel, the normally 6 mm thick grinding wheel consists of more than two layers of fiberglass for reasons of stability .
The abrasive grains bound in synthetic resin are exposed to an aging process, which is why every grinding wheel has an expiry date (usually 3 years after the production date). After this date has passed, or earlier if exposed to moisture, the performance of the discs may decrease.
Dimensions
Common sizes for grinding discs are: (outer diameter × thickness × bore diameter)
- 100 × 6 × 16 (mainly Asia)
- 115 x 6 x 22.2
- 125 x 6 x 22.2
- 150 x 6 x 22.2
- 180 x 6 x 22.2
- 230 × 6 × 22.2
- 300 x 8 x 75.2