Through the grinding industry, we contribute to the development of our customers and continue to envision a prosperous future together with the community.
Tsurumaru Sangyo Co., Ltd. is a company that mainly engages in the flat polishing of optical glass and the mirror polishing of metal cylinders both inside and outside. In the optical glass division, we primarily perform polishing processes for optical glass substrates used in digital home appliances. In the metal division, we conduct ultra-precision polishing of the inner and outer surfaces of valves and fittings used in semiconductor manufacturing equipment, primarily made from SUS materials. Since all processes are done by hand, advanced skills are required, and we utilize the craftsmanship to tackle polishing. [Business Activities] ■ Flat polishing of optical glass and mirror polishing of metal cylinders *For more details, please refer to our catalog or feel free to contact us.
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**Business Description** ■ Optical Glass Division - Optical glass flat surface polishing [Main Processed Products] - Optical glass such as whiteboard and BK-7 - Hard glass such as crystal and quartz - Soft glass such as blue filters - Various filter glasses - Various ceramics such as zirconia and alumina - Resin substrates such as polycarbonate - Other substrate glasses for various electronic components [Features] - Optical glass flat surface processing (single-sided polishing available depending on application) Capable of processing thin materials down to 0.180mm - Work sizes range from a maximum of 420φ and 310×310 to a minimum of 5φ and 5×5 - Thickness tolerance precision of ±1μm - Surface roughness of 0.002μm (2nm) - Specializes in small quantities, diverse varieties, and short delivery times - Processing available from purchased glass materials ■ Metal Division - Mirror polishing of metal cylinders, both inside and outside [Main Processed Products] - Parts for semiconductor manufacturing equipment (SUS), joints, valves, and others [Features] - Ultra-precision mirror polishing for small diameter holes from 3φ to 50φ - Polished surface roughness of 0.02μm (20nm) - Specializes in small quantities, diverse varieties, and short delivery times *For more details, please refer to the catalog or feel free to contact us.*
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For more details, please refer to the catalog or feel free to contact us.
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Tsurumaru Sangyo Co., Ltd. is a company primarily engaged in the optical glass flat polishing and the mirror polishing of metal cylinders, both inside and outside. In the optical glass division, we manufacture optical glass substrates focused on flat glass polishing, tailored to our customers' needs. In the metal division, we perform ultra-precision polishing on the inner and outer surfaces of supplied metal molded products. Moving forward, we will continue to contribute to our customers' development through our polishing business and create a prosperous future together with the community.