Used Okamoto Equipment Sold by Meadoworks

Okamoto Machine Tool Works, Ltd. was founded in 1926 by Kakusaburo Okamoto in Japan as a specialty machine tool manufacturer. The company reorganized under its present name in 1935 and quickly built a reputation for grinding innovation, developing Japan's first gear grinding machine and later Japan's first surface grinder, the PSG-6. It went on to produce the world's first CNC surface and profile grinding machine, the NFG-5, cementing its standing as a global pioneer in abrasive processing technology. Today Okamoto operates production facilities in Japan, Singapore, and Thailand, with sales subsidiaries across more than 70 countries including Okamoto Corporation in the United States.

Okamoto's flagship product line for metalworking shops is the ACC series of reciprocating surface grinders, which spans a wide range of table sizes and control configurations. The hydraulic ACC-ST and ACC-618 series are workhorses valued for smooth table movement and rugged Meehanite cast construction, while the ACC-DX saddle-type models add programmable automatic incremental downfeed as fine as 0.00005 inches. Larger column-type machines such as the ACC-DXNC and ACC-CA series handle workpieces up to 32 by 120 inches with two-axis simultaneous CNC control. Alongside surface grinders, Okamoto produces the OGM series of cylindrical grinders and the IGM series of internal grinders, rounding out a comprehensive abrasive processing portfolio.

Okamoto surface grinders are found across a broad range of precision manufacturing industries. Tool and die shops rely on them for flat, parallel die and mold components, while automotive suppliers use them for brake system parts, transmission components, and stamping dies. Aerospace manufacturers depend on Okamoto machines for structural components and turbine-related work where tight tolerances and mirror-quality finishes are non-negotiable. Medical device producers also turn to Okamoto for the consistent surface quality required on surgical instruments and orthopedic implants.

Used Okamoto surface grinders — especially reciprocating ACC-series machines — hold strong appeal on the secondary market for several reasons. Their heavily ribbed Meehanite castings and hand-scraped double-vee table ways are built to maintain accuracy over decades of production use, so well-maintained examples continue to hold geometry long after their initial sale. Parts and service support remain accessible through Okamoto Corporation's U.S. network and a global dealer infrastructure, reducing downtime risk for buyers of older machines. The sheer volume of ACC-series units sold over the years means that tooling, chucks, and replacement components are widely available, making a used Okamoto surface grinder a practical, cost-effective choice for toolrooms and production shops alike.

Meadoworks is your trusted source for used Okamoto equipment. As third-generation industrial equipment dealers and AMEA-certified appraisers with over 50 years of experience, we offer quality-inspected Okamoto machines at competitive prices. Most of our Okamoto inventory sells before we can list it online — call 800-323-0307 for equipment not yet listed.

Every machine includes detailed specifications and high-resolution photos, and inspection visits are available for most equipment. We ship worldwide with experienced rigging partners and offer financing for qualified buyers. Have Okamoto equipment to sell? Get a free valuation or contact our team.