Motor-driven hand grinding tool

A motor driven hand grinding tool 1, (figure 2, 1', figure 3, 1'') is defined with a simple conversion gear arrangement 21, 31. The grinding tool 1, (figure 2, 1', figure 3, 1'') comprises: a motor 2 with an anchor shaft 20 and grinding plate 4, all of which are mounted in a housing 10, where a drive shaft 30 is associated with the motor 2 and is perpendicularly arranged relative to a grinding surface 41. The conversion gear arrangement 21, 31 is placed between the anchor shaft 20 and the drive shaft 30 where the defection angle a between the anchor 20 and drive shafts 30 is between 40{ and 70{. The grinding tool 1, (figure 2, 1', figure 3, 1'') can have an eccentric cog arrangement (figure 2, 40) and weights provided on the drive shaft 30.