Long screw rods for motorcycle are essential components in various automotive applications, including suspension systems, steering assemblies, and engine mounting. Knowing the correct dimensions is crucial to ensure proper fit, performance, and safety.

Length and Threading

The primary dimension of a long screw rod is its overall length. Automotive long screw rods are typically available in lengths ranging from several hundred millimeters to over a meter, depending on the application. The threaded portion is another critical aspect, as it determines how the rod will engage with nuts, brackets, or other components. Thread type, pitch, and start location must match the design specifications to ensure secure assembly.

Diameter and Tolerance

The diameter of the rod affects its strength and compatibility with mating components. Common diameters for automotive long screw rods range from 8 mm to 30 mm, depending on the load requirements. Tolerance levels are strictly defined to ensure proper fit and prevent loosening or excessive wear during operation.

Material and Surface Finish

Although not a geometric dimension, the material and surface finish influence the rod’s effective size. High-strength steel or alloy rods are often used to withstand heavy loads, while coatings like zinc plating or black oxide prevent corrosion. These treatments may slightly change the external diameter, so precise measurements are necessary during manufacturing and selection.

Specialized Features

Some long screw rods may include additional features such as shoulders, grooves, or chamfers to accommodate specific automotive assemblies. These features are critical to ensure correct installation and prevent interference with other components.

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The S20C  K60R R50 * 120 Brake Cable  Parts for Automotive / Motorcycle with MFZn2-K coating for corrosion resistance, features a main size of R50 * 120, ensuring precise compatibility with the K60 model. Its robust design and leak-proof performance make it ideal for brake systems in automotive, industrial, and heavy machinery applications, offering exceptional durability, easy installation, and long-term reliability even in harsh operating conditions.