Thread Grinders - Mitsui Seiki

Since 1966

Global Leaders in Thread Grinding

Since 1966, Mitsui Seiki has grown to become the world’s dominant builder & supplier of thread grinding machines.

We offer 3 distinct families of thread specific machines including

  • 13 models of OD grinders for small parts (up to 300mm grind length) to precision screws to 5,000mm grind length to handle everything from small thread gauges, up to extended ball screws, feed screws, worm shafts, and drum screws & rotors for the most demanding applications.
  • 3 basic models of ID grinders for part lengths of max 180mm up to 600mm for all varieties of nuts, housings, and special applications.
  • 2 basic models of Thread Measuring & Inspection machines for ultra-precision verification of critical production, development and reference parts.

Ask us how we can help you achieve the profitable level of excellence & productivity needed to succeed in this challenging & specialized marketplace.

Thread Grinding Solutions Built for Precision-Driven Industries

Our thread grinding technology is trusted in fields where precision is non-negotiable – including aerospace, automotive, energy, medical, and industrial machinery. Each machine is built to deliver consistent, repeatable results and long-term performance.

At Mitsui Seiki, we don’t just build machines – we build solutions that elevate your productivity, quality, and profitability.