| 摘要 |
An improved raise boring bit to enhance cuttings removal and prevent accumulation of cuttings on the body of the bit, which utilizes a pair of radial rails and a plate connected with and strengthening the rails while defining an opening for the flow of cuttings beside the stem and the radial rails during boring. Cutter mounting means are disposed at intervals along the radial rails to permit the flow of cuttings between the rails and the mounting means. At least one wing extends radially from the plate for supporting additional cutters, a vertical stabilizer roller is mounted on the end of the wing and struts extend between adjacent sides of the wings for stability and support. |
