Flap disc
The flap wheel , even flap disc , is a dish-shaped grinding wheel in which the grinding agent is applied annularly on fan shape overlapping lamellae.
In 1972 it was made ready for series production - at that time as the Klingspor company's "abrasive mop plate" . Other companies (TAF, Gerd Eisenblätter GmbH and 3M ) also claim this development for themselves. Today the flap disc in industrial metalworking has replaced the grinding disc in many areas.
Structure of a flap disc
Flap discs consist of abrasive lamellas on a fabric backing, which are arranged on glass fiber reinforced synthetic resin discs or glass fabric discs in an overlapping radial direction. In addition to zirconium corundum, other types of synthetic corundum are used as abrasive grains. The arrangement of the lamellas ensures high flexibility and consistently high grinding performance. The advantages compared to the grinding wheel lie in the higher aggressiveness (productivity), in the low noise level and the uniform grinding pattern until the tool is completely used up. Advantages over z. B. Vulcanized fiber discs have a longer service life and better abrasive efficiency. In serrated lock discs, the service life of grinding discs with random grain orientation is combined with the aggressiveness and productivity of abrasives on a backing (vulcanized fiber discs) with oriented abrasive grain. The hand-arm strain on the worker is also significantly lower due to lower vibration and softer grinding. Flap discs are particularly suitable for coarse and intermediate sanding. They are used on all angle grinders without a backing pad.
Application examples are the processing of weld seams, deburring, derusting and plastering.