Precisely designed for the needs of the oil industry, the QK series is named for the specifications driving its development: Lathe Oil Country. SANZHENG QK series is capable of performing the tightest threading functions on big pipes with precision and speed. With three spindle bore variations specifically designed for this machine, it is able to accommodate large diameter pipes. Oil Field "Threading Suite" is custom-designed to combine variable speed threading and harmonic spindle control that delivers an exact match between infeed patterns and cutting increments. Our lathes are known for their power and control. Though huge in scale, the QK series delivers precision with optimum efficiency.