Abstract: Disclosed is an accessory mounted on a cutting device including two mutually parallel guide bars. The accessory includes a first channel formed in the accessory for receiving one of the two mutually parallel guide bars. A second channel is formed to receive the other of the two mutually parallel guide bars in such manner that the second guide bar is freely translatable in the second channel. An affixation device is firmly affixes the accessory to one of two mutually parallel guide bars.

Abstract: Disclosed is an accessory mounted on a cutting device including two mutually parallel guide bars. The accessory includes a first channel formed in the accessory for receiving one of the two mutually parallel guide bars. A second channel is formed to receive the other of the two mutually parallel guide bars in such manner that the second guide bar is freely translatable in the second channel. An affixation device is firmly affixes the accessory to one of two mutually parallel guide bars.

Abstract: To control the locking of a cable boring corer (1), a control device (30) is used, comprising a deflecting casing (33), a sleeve (31) and a piston (32), which are movable in relation to the deflecting casing (33). The piston (32) is able to be rendered integral in a lower position, under hydraulic pressure, with the sleeve (31) by a finger (43). When the hydraulic pressure is released, the sleeve (31), which is integral with the piston (32), is brought into an upper position which allows the circulation of a boring liquid through the deflecting casing (33) towards a boring crown (4).