| 摘要 |
A drilling machine for railroad rail in which a railroad rail (8) is clamped crosswise with respect to a main body case (1) by a clamp means comprising a catch fra me (6) and a clamp arm (7); a cutter (2) is advanced perpendicularly with respect to the middle part of a rail (8a) by turning the rotating handle (16a) of a link mechanism (16) to drill boltholes (13) in specific positions; and the drilling position of the bolthole (13) to be drilled in the middle part of the rail (8a) is set by means of height gauge (10), secured on catch frame (6), and pitch gauge 20, mounted an railroad rail (8).
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