A tool carrier assembly for use at a machine tool, which includes at least one workpiece-carrying spindle for rotatably driving a workpiece received in the workpiece-carrying spindle. The tool carrier assembly includes a first slide being movable in a first direction, a tool carrier being supported on the first slide and configured to hold a plurality of tools, a tool drive unit including a tool drive for engaging with one of the plurality of tools held by the tool carrier to rotatably drive said tool, when the tool is arranged at a tool drive position with respect to the tool drive, and a drive mechanism for driving movement of the first slide together with the tool carrier in the first direction relative to the tool drive position, when the tool drive is disengaged with the tool, to relatively move another tool of the plurality of tools into the tool drive position.

A tool carrier assembly for use at a machine tool, which includes at least one workpiece-carrying spindle for rotatably driving a workpiece received in the workpiece-carrying spindle. The tool carrier assembly includes a first slide being movable in a first direction, a tool carrier being supported on the first slide and configured to hold a plurality of tools, a tool drive unit including a tool drive for engaging with one of the plurality of tools held by the tool carrier to rotatably drive said tool, when tool is arranged at a tool drive position with respect to the tool drive, and a drive mechanism for driving movement of the first slide together with the tool carrier in the first direction relative to the tool drive position, when the tool drive is disengaged with tool, to relatively move another tool of the plurality of tools into the tool drive position.

A method for machining and finishing a metallic member to provide a finished product without any additional process uses a lathe and a milling process. A non-circular metallic member on a worktable is rotated, and lathe tool moved backwards and forwards to machine the peripheral top portion of the metallic member. The path of the lathe tool machines curved surfaces of the top portion of the metallic member. The rotation of the metallic member is then stopped, and a milling cutter is brought to meet the peripheral sidewall of the metallic member. The movement and feeding of the milling cutter is predetermined. The worktable rotates the metallic member to enable one end edge of the peripheral sidewall and then another to face the milling cutter, and have the end edge chamfered by the milling cutter.