Alloy Steel Shaft

This product is a CNC machined alloy steel shaft designed for precise positioning, rotation, and connection in mechanical assemblies. With a maximum outer diameter of Φ19 mm and a total length of 94 mm, it delivers high structural stability and machining accuracy. Both ends feature M5 threaded holes, allowing the shaft to be easily fastened, mounted, or connected to fixtures, couplings, or other precision components. The black oxide surface treatment provides corrosion resistance, uniform appearance, and improved wear protection during operation.

The shaft is made from SCM435 alloy steel, a chromium–molybdenum steel known for its high tensile strength, impact resistance, and excellent machinability. This material is commonly used for critical components such as gears, spindles, and mechanical shafts that require both strength and dimensional stability. After precision CNC turning and milling, the surface is treated with a black oxide coating that enhances oxidation resistance and prevents surface rusting. The treatment maintains the shaft's tolerance integrity, ensuring that assembly and mechanical fit are not affected.

This precision machined shaft features a stepped cylindrical structure, enabling it to fit seamlessly with matching parts in mechanical systems. The main outer diameter is tightly controlled within a tolerance range of (0 / -0.018 mm), ensuring accurate positioning and smooth rotation. Both ends contain M5 internal threads that support direct installation or extension through connecting rods or screws. Each machining surface undergoes precise finishing to maintain consistent geometry, roundness, and alignment, making it suitable for applications with high assembly accuracy requirements.

The alloy steel shaft is widely used in automation equipment, machine tools, robotic mechanisms, and mechanical fixtures. It serves as a key transmission and positioning element in assemblies requiring high reliability and consistent motion control. With its combination of material strength, surface protection, and dimensional precision, this black oxide shaft ensures stable performance and extended service life even under demanding industrial conditions.