Rock drilling machine

   
   

A rock drilling machine has a housing (1), a hammer piston (2) movable to-and-fro in the housing, a drilling tool (3), and a guide (4) for the drilling tool. The guide (4) consists at the surface against the drilling tool (3) of polyethyleneterephthalate.

Une foreuse de roche a un logement (1), un piston de marteau (2) mobile à-et-fro dans le logement, un outil de forage (3), et un guide (4) pour l'outil de forage. Le guide (4) consiste sur la surface contre l'outil de forage (3) du polyethyleneterephthalate.

 
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