8412.21.00.75 - Other

This HTS category, 8412.21.00.75, encompasses hydraulic power engines and motors that function through linear actuation but do not fall under the more specific subcategories of "Telescoping" or "Rodless" cylinders. These are typically characterized by a piston or ram moving in a straight line within a cylinder, powered by pressurized hydraulic fluid. The "Other" designation signifies that this classification serves as a residual category for linear acting hydraulic cylinders that possess distinct features or configurations not captured by the more narrowly defined sibling categories.

Distinguishing these "Other" linear acting cylinders from their siblings, "Telescoping" cylinders (8412.21.00.45) are characterized by multiple nested stages that extend sequentially, allowing for a longer stroke within a retracted space. "Rodless" cylinders (8412.21.00.60) achieve linear motion without an external piston rod, typically employing a band, magnetic coupling, or other internal mechanism to transmit force. Therefore, 8412.21.00.75 covers standard single-acting or double-acting cylinders where the piston rod is externally exposed and extends directly from the cylinder body, and which do not exhibit the multi-stage extension of telescoping types or the rodless design of the other sibling category.

As this category is a leaf node in the HTS classification, there are no further subcategories to introduce. Classification within 8412.21.00.75 is therefore determined by the fundamental characteristics of linear actuation via hydraulic power, combined with the absence of the specific structural attributes that define telescoping or rodless cylinders. Consideration should be given to the primary operating principle, physical construction, and intended application to ensure accurate classification.