FIELD: combination type working of metals, restoration and strengthening of cone-thread surfaces, mainly working oil-production pipes.
SUBSTANCE: tool includes housing having in its free outlet end working threaded portion reciprocal to threaded portion of worked part. In order to increase useful life period and fault-free maintenance of cone thread parts, working portion of tool is formed in accordance with standards of conicity degree, mean diameter in main plane, profile angle and pitch of worked thread. Working portion of tool includes turn corresponding to standard inlet turn matched with inner diameter of thread in end plane of pipe. At side of turn corresponding to standard inlet turn, additional threaded portion is formed; length of said portion is no less than thread pitch and it is no more than value of standard run-out of worked thread.
EFFECT: increased useful life period of cone-thread parts.
2 dwg
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