Mayekawa Manufacturing Company, the global industrial refrigeration specialist headquartered in Japan, has purchased one of Holroyd Precision’s highly acclaimed TG350E CNC rotor grinding machines. The machine is expected to more than halve screw rotor manufacturing time.

Mayekawa’s new Holroyd TG350E rotor grinder has been installed at the company’s Higashi-Hiroshima facility and will be used to precision-grind cast iron and stainless steel screw rotors of up to 350 mm in diameter. Mayekawa already operates a number of Holroyd machines across its Japanese manufacturing sites. The TG350E was chosen for its ability to provide high-speed rotor grinding, combined with uncompromising levels of accuracy. 

“We are delighted to have built a TG350E rotor grinding machine for Mayekawa,” comments Steve Benn, Holroyd regional sales director. “Traditionally, Mayekawa has rough milled then finish milled its helical rotors, using cutters where the finished profile shape is ground using a Holroyd CS500E tool management center. With an increasingly wide range of rotor types to manufacture, however, Mayekawa recognized the significant benefits that a TG350E CNC machine would bring to its production strategies.”

With a Holroyd TG350E rotor grinder at its Higashi-Hiroshima-based refrigeration compressor manufacturing site, Mayekawa is benefiting from the accuracy, speed and repeatability that Holroyd machines are renowned for – along with greater levels of automation and reduced set-up time. With Holroyd TG Series machines, a significant amount of production time is saved due to the fact that the diamond dressing wheels continuously dress during the cycle. By contrast, cutting tools require periodic re-grinding, depending on the materials and volumes being cut.

Equally suited to prototyping, batch and volume production, TG Series machines are designed primarily for the finish grinding of helical screw components such as worm screws and rotors, after they have been milled to a rough or semi-finished state. TG models offer production rates and accuracies to suit precise manufacturing strategies. Fully automated on-machine probing provides closed loop feedback of corrections to the dresser wheel and does not require a high level of operator skill.