The utility model provides a roll grinder holds in palm manual shaft turning gear made of baked clay, belongs to grinding technical field for improving the card and hindering the treatment effeciency of trouble and reduce workman's intensity of labour, its technical scheme is, including connecting axle and driving key in the constitution, connecting axle and roll grinder ask the turnscrew of tile coaxial, and the one end and the blind hole on the turnscrew terminal surface of connecting axle are matchd, and the cross section of the other end is regular hexagon or square, driving key inlay the dress in the keyway on the connecting axle side and with the blind hole inner wall of turnscrew on the keyway phase -match. The utility model discloses with monkey wrench cooperation use, only need alone can accomplish the processing that roll grinder tuo waka hinders the trouble, do not need the dismouting to hold in the palm tile and turnscrew in the processing procedure, not only practiced thrift the manpower, reduced operating personnel's intensity of labour, improved work efficiency in addition greatly, reduced to handle to block and hindered the required down time of trouble. Furthermore, the utility model discloses still have advantages such as simple structure, low cost, convenient to use, easy preparation.