Ball or roller screws
Transmission shafts (including camshafts and crankshafts) and cranks; bearing housings, housed bearings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers, including torque converters; flywheels and pulleys, including pulley blocks; clutches and shaft couplings (including universal joints); parts thereof: > Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately; ball or roller screws; gear boxes and other speed changers, including torque converters: > Ball or roller screws
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 8483.40.80.00
Precision Ball Screw for CNC Machines
A high-precision ball screw assembly consisting of a threaded shaft and recirculating ball nut, designed for linear motion in CNC machining centers. It converts rotary motion to linear motion with minimal friction, classified under HTS 8483.40.80.00 as a ball screw used in industrial transmission systems.
Roller Screw Actuator for Semiconductor Wafer Handlers
Heavy-duty roller screw mechanism providing high load capacity for precise positioning in semiconductor wafer transfer robots. Features planetary roller design for durability in cleanroom environments, squarely under HTS 8483.40.80.00 for roller screws in transmission applications.
Miniature Ball Screw for Medical Robotics
Compact ball screw with 3-6mm diameter for surgical robots and precision medical devices requiring backlash-free motion. Medical-grade materials and lubrication ensure sterility, classified as roller screw under HTS 8483.40.80.00.
High-Lead Ball Screw for Injection Molding Machines
Large-diameter ball screw (50-80mm) with fast lead for rapid clamp movement in plastic injection molding presses. High thrust capacity handles molding pressures up to 2000 tons, under HTS 8483.40.80.00 as industrial roller screw.
Planetary Roller Screw for Aerospace Actuators
Planetary roller screw with threaded rollers between screw and nut for extreme load applications in aircraft landing gear and flight control surfaces. Aerospace-qualified per AS9100, classified HTS 8483.40.80.00.
Zero-Backlash Ball Screw for 3D Printers
Preloaded dual-nut ball screw eliminating backlash for high-resolution Z-axis motion in industrial 3D printers. 16mm diameter precision-ground shaft, under HTS 8483.40.80.00 for roller screws.
Dia-Pitch Ball Screw for Semiconductor Crystal Pullers
Dia-pitch ball screw providing ultra-smooth constant velocity motion for Czochralski crystal pullers growing silicon boules. Vibration-damped design per statistical notes, HTS 8483.40.80.00 classification.
Heavy Duty Roller Screw for Steel Mill Stands
Forged roller screw (100mm+ diameter) for vertical adjustment of rolling mill work rolls in steel production. Extreme static load capacity >500kN, HTS 8483.40.80.00.
Corrosion-Resistant Ball Screw for Marine Winches
Duplex stainless steel ball screw with bronze nut for anchor winches and davit systems on offshore vessels. Saltwater corrosion resistance per ASTM standards, HTS 8483.40.80.00.
High-Speed Ball Screw for PCB Drilling Machines
High-DN ball screw (DN>220,000) for Z-axis of PCB drill/spindle units achieving 200,000 RPM positioning. Critical for microvia formation in semiconductor packaging, HTS 8483.40.80.00.