Patent ID: 7013775

Claim:
A tool holder comprising: a bottom holder block, said bottom holder block comprising a top wall, a positioning groove formed in said top wall and extending through front and rear sides thereof, a plurality of mounting through holes disposed at two sides relative to said positioning groove and fastened to a frame at a CNC lathe with screws, a plurality of screw holes symmetrically disposed at two sides relative to said positioning groove, and a semispherical recess formed in said top wall on a middle part of said positioning groove; a barrel fitting the positioning groove of said bottom holder block, said barrel having a spherical middle flank portion fitting the semispherical recess of said bottom holder block, and a center hole extending through two distal ends thereof for holding a tool shank; and a holding down block adapted to hold down said barrel in said positioning groove of said bottom holder block, said holding down block having a semispherical bottom recess fitting the spherical middle flank portion of said barrel and a plurality of mounting through holes disposed at two sides of said semispherical bottom recess and respectively fastened to the screw holes of said bottom holder block with a respective screw.