When grinding with flap discs the optimum angle between the wheel and the workpiece is 15-25°. This means that the abrasive wears off more at the edge than near the bore. That’s why very often 50% of the disc cannot be used properly.
By trimming your product you can reduce the backing diameter, thus achieving 100% use of the disc. Importantly, the backing must be suitable for this kind of application. Please note that you can trim the backing only as far as the end of the depression.
- During the processing of fillet welds, you can grind and trim at the same time. During contact with the workpiece the backing will be trimmed automatically.
- When processing surfaces or edges, you also have the option to trim the backing using the edge of the workpiece. Simply make contact with the edge of the workpiece while the disc is running and trim the backing.