Machines for making optical fibres and preforms
Machines for assembling electric or electronic lamps, tubes or valves or flash-bulbs, in glass envelopes; machines for manufacturing or hot working glass or glassware. > Machines for manufacturing or hot working glass or glassware: > Machines for making optical fibres and preforms > Machines for making optical fibres and preforms
Duty Rate (from China)
Products classified under Tariff item 8475.21
Czochralski Crystal Puller for Optical Fiber Preforms
A Czochralski crystal puller specifically designed to grow high-purity silica monocrystalline boules from which optical fiber preforms are sliced. It melts silica in a crucible and slowly pulls a seed crystal to form the boule, a process essential for producing the core material of optical fibers. This machine falls under tariff item 8475.21.00 as it is used for making optical fibre preforms.
8475.21.00Fiber Preform Dehydration Oven
A dehydration oven that removes hydroxyl impurities from soot preforms using chlorine gas at elevated temperatures, a critical step for producing low-loss optical fibers. It operates in a controlled humidity environment to ensure the preform's purity. This machine is used in the manufacture of optical fibre preforms, thus classified under tariff item 8475.21.00.
8475.21.00Float Zone Optical Fiber Preform Grower
A float zone machine that uses zone melting to produce ultra-pure silica rods or boules for optical fiber preforms by floating a molten zone along a polycrystalline rod. This method achieves higher purity than Czochralski, making it suitable for low-loss optical fibers. It is a machine for making optical fibre preforms, falling under tariff item 8475.21.00.
8475.21.00Fluorine-Doped Preform Plasma Processor
A plasma processor that dopes optical fiber preforms with fluorine using downstream microwave plasma to create depressed cladding index profiles in dispersion-shifted fibers. This process is critical for DWDM systems in telecommunications. The machine is used specifically for making optical fibre preforms, thus classified under tariff item 8475.21.00.
8475.21.00High-Purity Silica Crucible Puller
A machine that pulls optical quality silica boules from high-purity quartz crucibles using precise rotation and translation for preform slicing. It uses electric heating elements to maintain a stable melt, ensuring the boule's quality. This machine is used for making optical fibre preforms, so it is classified under tariff item 8475.21.00.
8475.21.00Integrated Preform Manufacturing Line
A complete turnkey line that combines VAD deposition, sintering, dehydration, and collapsing for high-volume optical fiber preform production. It is PLC-controlled with recipe management for consistent output. This integrated line is used for making optical fibre preforms, falling under tariff item 8475.21.00.
8475.21.00MCVD Modified Chemical Vapor Deposition Preform Tube Rotator
A Modified Chemical Vapor Deposition (MCVD) machine that rotates fused silica tubes while injecting gaseous precursors inside, depositing layers that collapse into preforms for single-mode optical fibers. It is essential for producing low-attenuation fibers. This machine is used for making optical fibre preforms, thus classified under tariff item 8475.21.00.
8475.21.00Optical Preform Grinder
A precision grinder that shapes the ends of optical fiber preforms to exact geometry for the fiber drawing process, using diamond tooling for silica glass. It maintains flatness critical for draw quality. This machine is used in the manufacture of optical fibre preforms, falling under tariff item 8475.21.00.
8475.21.00OVD Outside Vapor Deposition Preform Machine
An Outside Vapor Deposition (OVD) machine that flame hydrolyzes silicon tetrachloride to deposit soot on a ceramic target, building preforms for optical fibers. Multiple passes create graded index profiles. This machine is specifically used for making optical fibre preforms, thus classified under tariff item 8475.21.00.
8475.21.00Plasma CVD Preform Deposition Tower
A plasma-enhanced CVD tower that uses microwave plasma to deposit high-purity silica inside rotating tubes for advanced optical fiber preforms with fluorine doping capability. It produces fibers for long-haul telecom. This machine is used for making optical fibre preforms, falling under tariff item 8475.21.00.
8475.21.00Preform Collapsing Furnace
A high-temperature furnace that heats MCVD-deposited tubes to collapse internal layers into solid optical fiber preforms under a controlled atmosphere. It produces a symmetrical core-cladding structure. This furnace is used for making optical fibre preforms, thus classified under tariff item 8475.21.00.
8475.21.00Preform Etching Station
An automated hydrofluoric acid etching station that removes surface defects from optical fiber preforms, improving fiber strength. It features precise chemical dosing and rinsing. This machine is used in the manufacture of optical fibre preforms, falling under tariff item 8475.21.00.
8475.21.00Rod-in-Tube Optical Preform Assembler
An automated machine that inserts core rods into overclad tubes and collapses the assembly into monolithic optical fiber preforms using heat and pressure. It is used for specialty fibers. This machine is used for making optical fibre preforms, thus classified under tariff item 8475.21.00.
8475.21.00Silica Soot Sintering Kiln for Fiber Preforms
A specialized sintering kiln that consolidates porous silica soot preforms into dense glass rods suitable for optical fiber drawing, with precise temperature ramping to minimize defects. It is a critical post-deposition step. This kiln is used for making optical fibre preforms, falling under tariff item 8475.21.00.
8475.21.00VAD Chemical Vapor Deposition Preform Lathe
A lathe-based system that deposits silica soot layers via Vapor Axial Deposition (VAD) to build cylindrical optical fiber preforms, followed by sintering. It rotates the target mandrel during deposition for uniform growth. This machine is used for making optical fibre preforms, thus classified under tariff item 8475.21.00.