Nippon Kinzoku Co, Ltd has announced the launch of a sample supply program for its newly developed internally polished capillary tubes, a high-precision product designed to meet the increasingly demanding requirements of analytical, medical, biotechnology and advanced industrial applications. The new capillary tubes incorporate a proprietary internal polishing technology developed by the company to achieve exceptionally smooth inner surfaces in ultra-small diameter tubing. The innovation addresses growing market demand for miniaturized components capable of delivering higher levels of precision, cleanliness and performance.
Nippon Kinzoku has already established a strong reputation for manufacturing small-diameter stainless steel tubes with high dimensional accuracy and superior surface quality. Its earlier products, featuring an internal diameter of 0.50 mm and surface roughness of Ra 0.5 μm or less, have been widely adopted across a variety of specialized industries.
As analytical instruments, medical devices and biotechnology equipment continue to become more sophisticated, customers are seeking tubing with even smaller internal diameters and significantly smoother surfaces. Responding to this trend, the company has developed a proprietary polishing process capable of achieving a level of internal smoothness previously difficult to attain in the 0.30 mm diameter class.
The newly introduced tubes reduce internal surface roughness from conventional levels of Ra 0.5 μm to Ra 0.2 μm or less. The enhanced surface quality supports improved fluid flow characteristics, minimizes particle retention and contributes to greater measurement accuracy in precision applications.
In addition to superior smoothness, the tubes offer high dimensional accuracy with an internal diameter tolerance of ±0.03 mm across a size range of 0.30 mm to 0.70 mm. Manufactured using premium austenitic stainless steel grades such as SUS304 and SUS316L, the products also provide excellent corrosion resistance and long-term durability.These characteristics make the tubes suitable for a broad range of applications, including analytical instruments, laboratory equipment, medical and biotechnology systems, semiconductor manufacturing equipment and high-purity gas delivery systems.
The sample supply program is intended to support customers evaluating next-generation designs and advanced manufacturing processes. Meanwhile, the company is moving forward with the design and construction of dedicated production facilities to support commercial-scale manufacturing.Nippon Kinzoku aims to begin mass production during fiscal year 2027, further strengthening its position in the market for high-precision stainless steel products and supporting industries that require increasingly sophisticated fluid control and analytical technologies.
