A line boring machine creates very accurate bores in assemblies that have open holes. A device that makes precise holes, machining existing bores or holes out to required diameter, either clean up wear or to size for a bush, liner or bearings. A single point cutting action is utilized to bore out the material. Special attachments can be adapted to achieve the required surface finish on bores or faces. The machine speed and feed can be adjusted to rough out or fine feed rate for finishing to ensure that the job meets customer requirement .