| 摘要 |
A vertical grinder wherein at least two rotating grinding tanks are provided on a horizontally movable bed body, vertically movable and rotatable rotary tanks containing grinding materials respectively for coarse, medium and lustrous finishes are arranged in parallel with them, a vertically movable main spindle is provided above one of said rotary tanks and a plurality of collect chucks are made rotatable and are suspended with a work fitted on the peripheral edge of the lower end surface of said main spindle and are inserted in turn into said rotary tanks respectively for coarse, medium and lustrous finishes to grind the work.
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