| 摘要 |
A cutting tool holder for supporting a cutting bar is provided in which the radial distance between the axis of the cutting tool holder and the cutting edge of the cutting bar is adjustable. The cutting tool holder comprises a hub member having a tubular bushing rotatably mounted in an axial bore at the outwardly extending axial end of the hub member. The inner bore of the bushing is eccentric with respect to the axis of the hub member. The cutting bar is secured to a bar holder having a shank which is received in the eccentric bore. A circular drive plate is fastened across the inner end of the bar holder and prohibits both axial and rotational movement, but permits a radial movement of the bar holder within the eccentric bore. A first tubular and cylindrical bearing sleeve, constructed of a compressible material, is disposed between the bushing and the hub member. Likewise, a second tubular and cylindrical bearing sleeve also constructed of a compressible material, is disposed in the eccentric bore between the bushing and the bar holder. The bearing sleeves facilitate the rotation of the bushing necessary to produce the radial adjustment of the cutting edge of the cutting bar. A biasing member constructed of compressible material produces engagement of portions of the cutting tool holder to frictionally retain the radial adjustment of the bushing.
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