8412.21.00.60 - Rodless

This classification covers hydraulic power cylinders, specifically those that operate with a linear motion but do not feature a protruding rod. These "rodless" cylinders achieve linear actuation by internal mechanisms, such as a carrier attached to an internal piston that moves along the cylinder's exterior or through a slot. This design is employed when space is limited, or where a traditional rod could be susceptible to damage or contamination.

Distinct from its sibling category 8412.21.00.45 (Telescoping), rodless cylinders do not extend in stages like a series of nested tubes. Instead, they provide a direct, single-stroke linear movement without the external rod component. The "Other" sibling (8412.21.00.75) would encompass any linear acting hydraulic cylinders not specifically defined as telescoping or rodless.

As a leaf node, this category signifies the most specific classification for these types of hydraulic cylinders. Classification within this code hinges on the absence of an external rod for linear actuation and their function as hydraulic power transmission devices. Examples include compact linear actuators used in automation, material handling equipment, and specialized industrial machinery where space constraints or environmental factors necessitate a rodless design.