The global Harmonized System (HS) code for an axial piston motor is 8412.29. Under the World Customs Organization (WCO) nomenclature, subheading 8412.29 covers hydraulic power engines and motors of non-linear acting (rotary) design, distinguishing rotary fluid power motors from linear hydraulic cylinders (subheading 8412.21).
Accurate Harmonized Tariff Schedule (HTS) classification is essential for calculating import duties, verifying Section 301 tariff exposures, and preventing customs entry delays when importing hydraulic drive components such as Rexroth-equivalent A2FM, A6VM, and A2FE series motors.
Hydraulic Motor vs. Pump HS Code Classification
The most critical regulatory compliance step in fluid power cross-border trade is distinguishing between hydraulic pumps and hydraulic motors. Misclassifying an axial piston motor as a hydraulic pump triggers customs audits, tariff reassessments, and clearance delays.
- Heading 8413 (Hydraulic Fluid Pumps): Covers mechanical apparatus that draw in fluid and deliver it under positive displacement to generate hydraulic flow.
- Heading 8412 (Hydraulic Engines and Motors): Covers fluid power actuators that receive pressurized fluid and convert hydraulic power into rotary mechanical torque and shaft rotation.
Because axial piston motors consume pressurized oil rather than discharge it, they are legally classified under Heading 8412 as rotary hydraulic motors.
Regional HTS Codes for Axial Piston Motors
While the first six digits (8412.29) are standardized worldwide by the WCO, importing countries utilize 8-digit, 10-digit, or 11-digit statistical suffixes to determine domestic trade duties and tariff line items.
Commercial Invoice Declaration Requirements
Customs border inspection officers cross-examine the physical commercial invoice description against the declared 10-digit HTS code. To ensure rapid automated clearance, the line-item description must contain five essential technical parameters:
- Functional Naming: Explicitly declare the term "Hydraulic Motor" (avoiding ambiguous terms like "Hydraulic Unit" or "Hydraulic Part").
- Displacement Mechanism: Specify "Axial Piston Type" and define the internal architecture as either "Bent-Axis" (e.g., A2FM series) or "Swashplate" (e.g., A10VM series).
- Kinematic Motion: State "Rotary Acting" to formally differentiate the component from a linear hydraulic cylinder.
- Displacement Control: Identify whether the unit is "Fixed Displacement" or "Variable Displacement".
- Target Application: Note the end-use machinery category (e.g., "Hydraulic drive motor for mobile construction machinery or industrial winch").
US Section 301 Tariffs and Landed Cost Calculation
Axial piston motors originating from China (HTSUS subheading 8412.29.80) are subject to United States Section 301 trade remedies (List 1) alongside base Most Favored Nation (MFN) duties.
Landed Cost Mathematical Formula:
Calculating total landed import costs requires incorporating commercial invoice value, ocean freight, base customs duty, and additional trade remedy tariffs:
Where:
- CIF Value: Commercial invoice cost, marine insurance, and international freight.
- MFN Duty Rate: Standard general statutory tariff (typically 0% to 1.5% for 8412.29).
- Section 301 Rate: Additional statutory trade remedy tariff (currently 25% under List 1).
- Customs Fees: Merchandise Processing Fee (MPF) and Harbor Maintenance Fee (HMF).
*Compliance Note: Verified industrial buyers importing for specific non-commercial or technological repair exclusions must file applicable secondary Chapter 99 classification headings (such as 9903.88.01) alongside the primary 8412.29.8045 classification.*
Classification of Integrated Motor-Gearbox Assemblies
A common regulatory challenge arises when an axial piston motor is mechanically integrated with a planetary reduction gearbox to form a tracked travel drive, swing drive, or winch assembly.
Under General Rule of Interpretation 3(b) [GRI 3(b)], composite machines consisting of multiple distinct components are classified according to the component that provides their essential character:
- Detachable Assemblies: If the hydraulic motor unbolts cleanly from the planetary gearbox flange without disassembling internal hydraulic oil circuits, the motor must be declared under 8412.29 and the gearbox declared under Heading 8483 (gears and gearing).
- Monobloc Integrated Travel Drives: If the hydraulic motor casing and planetary gearbox housing form an inseparable single casting, customs authorities classify the complete assembly under Heading 8483 or as machinery parts under Heading 8431. Providing engineering section drawings showing the physical interface prevents customs misclassification disputes.
Export Documentation for Replacement Piston Motors
Sourcing cost-effective aftermarket hydraulic components requires suppliers who maintain rigorous international customs documentation. Every unit must be accompanied by standard Certificates of Origin (CO), calibrated factory pressure test logs, and ISO 9001 compliance sheets.
To review full technical specifications, ISO port configurations, and crossover datasheets for Huade A2FM, A6VM, and A2FE series motors, browse our Industrial Axial Piston Motors Catalog.
For export proforma invoices, verified HTS customs commodity codes, or formal quotation requests, Contact Huafilter International Logistics Support.