The structure of the flap disc is mainly composed of several sheets of sandpaper glued together around the edge of the disc, which has good grinding ability and the characteristics of obtaining a delicate surface effect. Specifically, flap discs usually have two shapes: curved and flat. The grinding plane of the curved flap disc is designed with an upward angle, so that all blades can contact the Píosa oibre, mar sin tá an ráta gearrtha agus an éifeacht dromchla sách comhsheasmhach; Cé go bhfuil dromchla meilte an diosca flap cothrom cothrom, tá an éifeachtúlacht gearrtha tosaigh níos airde, ach tá an éifeacht dromchla níos gaire .
Ina theannta sin, beidh tionchar ag líon na lanna sa diosca flap ar a fheidhmíocht . dioscaí flap ard-dlúis (i {. e . dioscaí flap le níos mó lanna) Tá éifeachtúlacht gearrtha níos airde acu, ach tá siad sách costasach . freisin
