CNC Turned Carbon Steel Shaft With Through Hole Precision Blackened Axle

Product Specification

CNC Turned Carbon Steel Shaft with Through-Hole – Precision Blackened Axle Component for Mechanical Transmission & Torque Support

This black carbon steel shaft is a precision CNC-turned mechanical component, engineered for use in rotational systems, mechanical transmissions, or assembly structures requiring high strength and accurate alignment. The part features a multi-diameter stepped design with a central through-hole, offering both mechanical performance and versatile integration into complex systems.

Key Features & Structural Overview:

Material

Manufactured from high-strength carbon steel, treated with a black oxide finish for enhanced corrosion resistance and a professional, non-reflective appearance. This surface treatment also adds mild wear resistance and aesthetic uniformity.

Precision CNC-Turned Geometry

The component is machined with tight tolerances using CNC turning technology, ensuring consistent concentricity, surface finish, and dimensional accuracy—critical for parts used in dynamic assemblies.

Three-Part Structure:

1. Shaft Ends – Reduced-Diameter Necks
   Both ends of the part feature narrow cylindrical journals, typically used for bearing seats, rotational fitments, or axial alignment within housings or mating parts.

2. Central Body – Oversized Cylinder
   The middle section is a larger-diameter cylindrical body, serving as the main structural region. It offers increased load-bearing area, torsional rigidity, and room for secondary features.

3. Central Through-Hole
   A circular hole passes laterally through the central body, precisely drilled to accommodate pins, bolts, or fasteners. This allows for easy mechanical assembly, locking, or torque transmission between connected parts.

Functional Applications:

• Mechanical power transmission systems

• Rotary shafts in automation equipment

• Structural pivots or linkage points

• Torque transfer and shaft locking interfaces

• Alignment or support components in mechatronic assemblies

Its structure is especially suitable for use in rotating or load-bearing roles, such as in gearboxes, joints, drive systems, or machinery linkages.

Our Manufacturing Capabilities

We specialize in custom shaft machining and CNC component production, supporting a wide range of industries including automotive, robotics, machinery, and automation.

Core Manufacturing Capabilities:

• Materials Supported:

  • Carbon steel (Q235, 1045, 4140, etc.)

  • Alloy steel, stainless steel, aluminum, brass, tool steel

• Machining Services:

  • CNC turning (up to Ø300mm)

  • Center drilling, threading, grooving

  • Cross-hole and deep-hole drilling

  • Precision grinding (for journals, bearing fits)

  • Keyway broaching, slotting (optional)

• Surface Treatments:

  • Black oxide, phosphating, zinc plating, nitriding

  • Heat treatment: quenching, tempering, induction hardening

• Quality Control:

  • Dimensional tolerances as tight as ±0.01 mm

  • Concentricity, roundness, surface roughness (Ra ≤ 0.8μm)

  • Inspection tools: CMM, calipers, micrometers, hardness testers

  • Material traceability & RoHS-compliant finishes

• Production Support:

  • Low-volume prototyping to high-volume OEM production

  • Full technical drawing review & DFM optimization

  • Packaging and export-ready logistics services

Looking for custom-machined shafts for your transmission or equipment projects?
We provide tailored solutions with fast lead times and competitive pricing. Send us your technical drawings or specifications, and our engineering team will support you from prototyping to mass production.

Contact us today for a free quote and engineering consultation.