The cutting edge diameter tolerance of our carbide small-diameter drill is ±0.001mm, which enables highly accurate drilling. SII also provides a wide variety of order-made tools including 2, 3 and 4-stage combined drills.

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SII carbide end mills are the most appropriate tools for highly accurate flat cutting.Our strength lies in our custom-made tools, including straight tooth combined end mills, that can finish complicated flat cutting in a single process.

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SII carbide reamers are the most suitable for finishing process of the components requiring hole surface roughness. Our strength lies in our custom-made tools including multi-stage combined reamers.

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Our cylindrical shank bites are the most appropriate tools for hole grinding and back chamfering. Angled shank brazed bites are used exclusively for automated lathes.

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SII highly accurate taps, small-diameter female screw processing tools, are created through vacuum heat treatment and screw grinding processes.

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Utilizing complete rolling thread processing, SII roller dies achieve highly accurate male thread machining with smooth finish surface.

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SII gauges, used for male and female screw thread check, realize highly accurate hole and outer diameter of small components.

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SII carbide cutters, with their modules ranging from 0.06mm to 0.5mm, are the most appropriate tools to machine small gears for precision gauges and watches. The manufacturing of unique tooth profile is available.

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Utilizing complete rolling thread processing, our Knurling tool are perfect for small-diameter knurling for precision gauges and watches. SII Knurling tool achieve highly accurate thread processing with smooth finish surface.

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SII carbide broaches are the most suitable for punching ink flutes on ball-point pen tips, etc.

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