| 摘要 |
A mechanical drilling aid serves for guiding a drilling tool (42) when drilling a bore into an object, in particular into a wall (39), eccentrically to an existing faulty bore (20), when the cross-sections of the faulty bore (20) and the correct bore intersect each other or extend immediately adjacent each other. In order to ensure simple and exact guiding of the drill during the drilling operation, the mechanical drilling aid comprises a guide element (14) provided with a cylindrical opening (25) for guiding the drilling tool (42). A rod-shaped part (16), which is capable of being introduced into the faulty bore (20) projects from the guide element (14) and can be applied against the inner wall (21) of the faulty bore (20), at least along one outer edge (18), the distance between the outer edge (18) of the rod-shaped part (16) and a longitudinal center axis of the cylindrical opening (25), measured across the center point of the cross-section of the faulty bore, being equal to the sum of the amount of eccentricity between the faulty bore and the bore, and the radius of the faulty bore (FIG. 7).
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