Tool holder

A tool holder comprising a tool bit supporting member having a generally cylindrical body portion having an axial bore therethrough and a tool bit supporting portion projecting from the side surface of the cylindrical body portion for releasably mounting a tool bit on the upper surface thereof, the upper surface of said cylindrical body portion having a plurality of indexing and fixing recesses therein angularly spaced around said bore and the peripheral side surface of said body portion having a plurality of rough indexing recesses therein angularly spaced around said surface, a shank having vertically spaced limbs at the forward end thereof defining a recess therebetween for slidably receiving therein the cylindrical body portion of the tool bit supporting member, a bolt extending vertically between the limbs of the shank and through said bore in the cylindrical body portion of the tool bit supporting member for pivotally mounting and securing the tool bit supporting member to the shank, an adjusting and fixing screw threadingly engaging with the upper limb of the shank and having a tip end for engaging selectively with one of the angularly spaced indexing recesses in the upper surface of the cylindrical body portion, and a ball mounted in the shank and urged resiliently against the peripheral side of said body portion for engaging in one of the angularly spaced rough indexing recesses in the side surface of the cylindrical body portion.