The thread for the percussion drilling.Male and female portion to form part of the gasket and method of manufacture of a product having thread to form part of a screw joint for drilling the percussion.

摘要

b "the thread for the percussion drilling.Male and female portion to form part of the gasket and method of manufacture of a product having thread to form part of a screw joint for drilling the percussion " d .The present invention relates to a joint screw, with a male portion and a female portion and to a method for the manufacture of a product to the percussion drilling.The threaded connection comprises at least a substantially cylindrical external thread and an internal thread substantially cylindrical.The external thread is provided on a crumpit (13) of a component of a chain of drilling.The screw includes a threaded ends (30) provided in connection with a full profile thread associated (14a). The thread comprises flanks of the thread (30a, 30b, 14b, 14C).At least one of the threads substantially cylindrical, comprises at least one end of thread (30), whose shape is different from the way of full profile thread (14a).Each flank of the thread (30a, 30b) from the outer edge of the thread (30) has a profile that differs from the profile of the flanks (14b, 14C), associated with the full profile thread (14a).