Mingzhi Zhang

Part of Precision Technologies Group (PTG) Ltd., Precision Technologies Group (US) Ltd. was founded in 2015. The company is based in Rochdale, UK. Precision Technologies Group (US offers electrical and mechanical retrofit, refurbishment, redesign, and upgrade services for PTG Holroyd and PTG Powerstir friction stir welding machine tools. The British company also manufactures industrial blowers, including conventional "Roots" type rotary lobe blowers to twin-screw helical blowers. Holroyd, a benchmark for superior component manufacture technologies using friction stir welding and rotor milling and grinding machines, is a world-leader in the design, build, and supply of high-precision gear, rotor, screw, and thread milling, grinding, and friction stir welding machines. Precision Technologies Group (US is also an expert in dismantling, moving, rebuilding, and re-commissioning even the largest, most complex of machine tools.

Holroyd Precision Ltd. specializes in the design, build, and supply of high-precision gear, rotor, screw, and thread milling, grinding, and friction stir welding machines. The company is based in Rochdale, UK and ultimately controlled by the City of Chongqing. The British company emphasizes the importance of Planned Preventive Maintenance to ensure their machines run like new and that their customers get the most out of their investment. Holroyd is a world-leader in precision tooling for the friction stir welding process and has set the benchmark for superior component manufacture technologies using friction stir welding and rotor milling and grinding machines.