Manual grinding device suitable for blind hole machining

The invention discloses a manual grinding device suitable for blind hole machining, comprising: a base body, wherein a mounting cavity is formed in the base body, and a plurality of mounting ports communicating with the mounting cavity are formed in the side wall of the bottom part of the base body; a positioning part which is rotationally arranged outside the base body relative to the base body; a center rod arranged in the mounting cavity in a sliding manner; grinding indexing blocks arranged in the mounting ports in a sliding manner; elastic components which are arranged on all the grinding indexing blocks in a sleeving manner, so that the grinding indexing blocks are in wedge-shaped contact with the bottom part of the center rod; and a tension adjusting component which is arranged in the mounting cavity and used for driving the center rod to move up and down in the mounting cavity, so that the grinding indexing blocks extend out and contracts in the radial direction. According to the manual grinding devic