Description
We Jiangsu Shuangzheng Machinery Co.,Ltd is a professional slewing slewing bearing manufacturer.Our slewing ring bearing size range from 200mm to 5000mm,with exteral gear & with internal gear & without gear.
Our quality control is divided into self-inspection, in- process quality control and final inspection. Final inspection will control the quality in full accordance with ISO9001: 2015 quality system and make sure each process are traceable.Our Heat treatment process is the core of manufacturing process. Our company is using the most advanced heat treatment equipment to improve product quality and service life.