FIELD: engines and pumps.
SUBSTANCE: invention relates to machine building and can be used in production of long-sized sucker rods making the component of sucker rod string in oil extraction. Bar is subjected to machining and straightening-finishing. Thread is cut at bar ends while bulge is swaged ahead of said thread. Thrust ring is fitted at the bulge of bar every end and secured thereat. Thread heads are screwed on thread with interference fit. Internal and external thread is made on one thread head. Only internal thread is made on other head. Flats are made at side surfaces of thread heads. Used thrust ring has conical bore. Said thrust ring can be fitted in place at press in cold of hot state.
EFFECT: higher reliability, lower labour input.
6 cl, 4 dwg
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