2.5 hydraulic cylinder seal kit

The nomenclature 30x42x7 describes the oil seal's three critical dimensions the inner diameter (ID), outer diameter (OD), and width (W). Specifically, this oil seal features an inner diameter of 30 mm, an outer diameter of 42 mm, and a width of 7 mm. These measurements indicate that it is designed to fit into a specific space within a machine, preventing the leakage of fluids, particularly oil, from critical components like shafts and housings.

Oil seals are designed to fit around the rotating shaft of a machine or equipment. They create a barrier between the moving parts of the machinery and the external environment, ensuring that oil and other fluids do not leak out. This is vital for maintaining the efficiency and durability of the machinery, as leakage can lead to a loss of lubrication and increased wear and tear on the moving parts.