Problem to provide a manual grinder that can be finely controlled with the roughness of the powder.Manual grinderHollow shell bodyIt has an inner screw threadA body 10 having a first bearing 11 and an outer blade 12 at its lower endProtrude from the upper end of the bodyA drive shaft 13 having a neck 130 having a diameter smaller than the diameter of the lower endIt has an outer screw mount 21 corresponding to the inner screw threadA second bearing 22 is provided midwayPass the neck 130 of the drive shaftAn adjustment ring 20 having a plurality of convex blocks 23 to the outsideA rotary ring 24 having a plurality of convex blocks 25 which can engage with convex blocks 23 outside the adjustment ringIt is held between the rotary ring 24 and the bodyPress the ringThe convex block 25 of the rotary ring 24 is positioned above the convex block 23 of the adjustment ringSpring 26 which is not engaged with the springDisposed above the adjustment ringA power structure 30 used to couple the hand rank 31 to the drive shaft.Diagram
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