STI-IR Co,.Ltd.
Most recent update: 2026-09-03
Founded in 1952, we have been engaged in the precision machining of metal mechanical components for over 70 years. We have a proven track record of supplying finished products to leading manufacturers. Leveraging our proprietary plastic welding technology, we also develop, manufacture, and market metal-free toothbrushes.
PR message
STI-IR Co., Ltd. is a Japanese manufacturer based in Higashiosaka, Osaka. The company operates through its Machinery Division, specializing in precision machining, automated machinery and labor-saving equipment, and its Commodity Division, which develops and manufactures 360-degree toothbrushes and oral-care products. STI-IR also designs its own toothbrush production equipment, combining engineering expertise with proprietary product development.
Since our founding in 1952, we have been providing in-house precision machining services for metal and other components in Higashi-Osaka, a city renowned for its skilled craftsmanship and manufacturing excellence.
We offer an integrated manufacturing process, handling everything from precision parts machining to the production, assembly, and adjustment of large-scale automated machinery. Our completed machines have been delivered to numerous leading manufacturers, demonstrating our proven track record of quality and reliability.
Major Equipment
* Machining Centers
* Wire EDM Machines
* CNC Milling Machines
* Jig Milling Machines
* Boring Milling Machines
* Conventional Milling Machines
* CNC Lathes
* Conventional Lathes
* Surface Grinders
* Contour Machines (Band Saws)
* TIG Welding Machines (Argon)
* Arc Welding Machines
* Various Cutting Machines
* Various Drill Presses
* Internal Keyway Slotting Machines
* EDM (Electrical Discharge Machining) Machines
* 360-Degree Hair Brush Manufacturing Machines
* Thread Rewinding Machines (In-house Developed)
* Blister Packaging Machines
STI-IR’s 360doBRUSH φ Large Head is a 360-degree oral-care toothbrush for adults, dental use and assisted brushing. It features over 15,000 soft 0.08 mm bristles on a 17 mm cylindrical head, rounded tips, a metal-free structure and heat resistance up to 100°C. It supports daily brushing, elderly care, tongue cleaning and denture care.
 |
Energy-saving machinery designing（ Designing / Industrial equipment designing ） |
|---|
| Company name | STI-IR Co,.Ltd. | Website URL | https://www.sti-ir.com/ |
|---|---|---|---|
| Street address |
Higashiosaka Osaka Japan
[See map] |
Person in charge | 徳永 厚志 |
| Telephone number | +81-6-6730-1712 | Fax number | +81-6-6730-1713 |
| Capital | 120,000 $ | Employees | 35 |
| Annual sales | Unregister | EMIDAS Member Number | 119510 |
| Main 3 products |
|
||
| Large | Medium | Small |
|---|---|---|
| Designing | Industrial equipment designing | Automatic machinery manufacturing Precision automatic machinery designing Energy-saving machinery designing |
| Development and production of prototype/Small-scale production | Machining | General-purpose milling General-purpose lathe machining Gear hobber Keyway milling |
| Development and production of prototype/Small-scale production | NC machining | NC lathe machining |
| Development and production of prototype/Small-scale production | Electrical discharge machine | Wire electric discharge machining Electric discharge machining |
| Assembly/Inspection | Assembly | Industrial machinery assembly |
| Assembly/Inspection | Repair | Industrial machinery repair |
| Product manufacturing | Medical equipment manufacturing | Dental products |
