Boyu Petro's Automatic Pre-Tightening Unit is a fully automatic coupling makeup and breakout system designed for OCTG tubing, casing and drill pipes. This automatic bucking unit features an auto greasing device and supports series or parallel configuration. The parallel mode nearly doubles efficiency, allowing two tubulars to complete makeup and pre-tightening simultaneously. Compliant with API 5CT standards, this PLC-controlled unit delivers precise, high-speed pre-tightening and pre-makeup for pipe production lines. It greatly shortens operation time and boosts throughput. Contact us for a factory quote on this automatic pre-tightening unit for your production line.