Cutting tool holder

A cutting tool holder, comprising:

• a hub member having a mounting end and an outwardly extending end and adapted to be rotated around its axis of rotation, said hub member having a cylindrical bore formed therein eccentric to said axis of rotation;
• a bar holder having a cylindrical shank portion disposed in said hub bore and adapted to support a cutting bar having a cutting edge;
• means for securing said bar holder in said bore while permitting rotation of said bar holder in said bore whereby rotation of said bar holder in said bore alters the radial distance of the cutting edge of said cutting bar from said axis of rotation, and
• a tubular and cylindrical bearing sleeve constructed of a compressible material disposed between said eccentric bore and the shank of said bar holder whereby substantially the entire outer periphery of said bearing sleeve flatly abuts against the eccentrical bore and whereby substantially the entire inner periphery of said bearing sleeve flatly abuts against the outer periphery of said shank.

A cutting tool holder, comprising:

• a hub member having a mounting end and an outwardly extending end and adapted to be rotated around its axis of rotation, said hub member having a bore formed therein eccentric to said axis of rotation;
• a bar holder having a shank portion disposed in said hub bore and adapted to support a cutting bar having a cutting edge;
• means for securing said bar holder in said bore while permitting rotation of said bar holder in said bore whereby rotation of said bar holder in said bore alters the radial distance of the cutting edge of said cutting bar from said axis of rotation, and
• a tubular and cylindrical bearing sleeve constructed of a compressible material disposed between said eccentric bore and the shank of said bar holder,
• said bar holder including an annular flange which abuts against an annular surface on the outwardly extending end of said hub member,
• said hub member including a second annular surface facing the mounting end of said hub member, and
• said means for securing said bar holder in said bore further comprises a disc-shaped drive plate secured to the inner axial end of said bar holder;
• and an annular bearing ring constructed of a compressible material and disposed between said drive plate and the second annular surface of said hub member to urge said annular flange into frictional engagement with said first mentioned annular surface of said hub.