It is possible to grind eccentric shafts and eccentric holes, which are usually difficult, as well as to create programs for grinding irregular inner and outer shapes.
The secret of Tokiwa Seiko's technology that meets diversifying needs lies in its wide range of in-house equipment. The "Mitsui Seiki 300G" features a grinding wheel that rotates at high speeds (up to 90,000 RPM) and has a spindle that rotates in a planetary motion, along with a very complex motion that includes vertical movement (approximately 70 mm chopping stroke). This allows for grinding of eccentric shafts and holes, which is typically difficult, as well as the creation of programs for grinding irregular inner and outer shapes. Sometimes, delicate processing is done by attaching headphones to listen to the vibrations of the workpiece while proceeding with the machining. The grinding wheels used include electroplated borazon and diamond, as well as bonded WA and vitrified CBN types with shafts. *For more details, please refer to the PDF or feel free to contact us.*
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Since our founding in 1937, we have adapted our business to the times, starting production of molds around 1955, primarily manufacturing powder metallurgy molds and precision press molds. Currently, leveraging the know-how gained from mold production, we have expanded our field into the area of ultra-precision component processing, receiving high praise from various sectors. Moving forward, all of our employees will continue to strive for improvement, aiming to be a company that contributes to society through manufacturing that looks toward the future.