Test benches
Measuring or checking instruments, appliances and machines, not specified or included elsewhere in this chapter; profile projectors; parts and accessories thereof: > Test benches
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 9031.20.00.00
Compressor Performance Test Bench
Test platform for air/gas compressors measuring capacity, efficiency, leakage, and operational parameters across speed ranges. Classified in HTS 9031.20.00.00 as a dedicated test bench excluding automatic regulators of 9032. Features environmental chambers for temperature/humidity simulation.
Fuel Injector Test Bench
High-pressure test bench for common-rail fuel injectors, measuring spray pattern, flow rate, response time, and durability. Classified HTS 9031.20.00.00 for precision fuel system component testing. Features optical spray analysis and millions-of-cycle capability.
Automotive Engine Test Bench
A specialized test bench designed for comprehensive testing of internal combustion engines, measuring parameters like power output, torque, emissions, and fuel efficiency under controlled conditions. It falls under HTS 9031.20.00.00 as a test bench for evaluating engine performance in simulated real-world operating scenarios. These benches typically include dynamometers, instrumentation, and data acquisition systems.
Electric Motor Dynamometer Test Bench
A test bench equipped with a dynamometer for loading and precisely measuring the performance of electric motors, including torque, speed, efficiency, and temperature profiles. Classified under HTS 9031.20.00.00 as it serves as a dedicated test platform for motor validation in R&D and quality control. Features computerized controls for data logging and performance curve generation.
Hydraulic Pump Test Bench
Test bench for evaluating hydraulic pumps and systems, measuring flow rate, pressure, efficiency, and cavitation under variable loads. It qualifies under HTS 9031.20.00.00 as a profile projector-exempt test bench for fluid power components. Includes closed-loop simulation circuits and sensors for real-time diagnostics.
Transmission Gearbox Test Bench
A dynamometer-based test bench for automotive and industrial gearboxes, assessing shift quality, efficiency, noise, vibration, and harshness (NVH). Falls under HTS 9031.20.00.00 for its role in systematic performance profiling of transmissions. Equipped with programmable load cycles simulating driving conditions.
Valve Flow Test Bench
Precision test bench for control valves and regulators, quantifying flow coefficients (Cv/Kv), pressure drops, and leakage rates. Under HTS 9031.20.00.00 for hydraulic/pneumatic valve performance profiling. Includes quick-change fixtures and automated sequencing.
Turbine Blade Test Bench
Test bench for wind/gas turbine blades evaluating aerodynamic performance, fatigue, and structural integrity under simulated loads. HTS 9031.20.00.00 classification for specialized profile/aerodynamic testing excluding Chapter 84 machinery. Incorporates wind tunnels and strain gauging.
Battery Cycle Life Test Bench
Multi-channel test bench for lithium-ion and other batteries, performing charge-discharge cycling to determine capacity fade, impedance, and safety limits. Falls under HTS 9031.20.00.00 as electrical performance test equipment per Chapter 90 exclusions. Includes thermal chambers and EIS capability.
ABS Brake Test Bench
Test bench simulating anti-lock braking systems, evaluating modulation, pressure dynamics, and wheel slip control. Under HTS 9031.20.00.00 as vehicle subsystem performance test platform. Includes road-wheel simulation and failure mode testing.