Lens barrel
It's a technique for narrowing small tubular bodies!
Material SUS304 and SUS316L, plate thickness t=0.04 mm. Outer diameter of the tube 0.47 mm, inner diameter of the tube 0.39 mm, maximum tube length 3.2 mm. The end of the tube has a round hole with a diameter of 0.35 mm, referred to as a "mirror tube." The photo on the left shows a mechanical pencil lead with a diameter of 0.3 mm. The photo on the right shows the material before it was narrowed.
- 企業：TOKUDA-ARD 本社
- 価格：Less than 10,000 yen
