CNC Turning Custom Machining Solutions

We specialize in CNC precision turning of stainless steel components, with a strong focus on passivation as a core surface treatment. By combining precision machining with advanced surface finishing, we deliver durable, corrosion-resistant, and high-accuracy components suitable for instrumentation, transmission systems, industrial connectors, and automation equipment.

With factory-direct supply, full-process quality control, and flexible production capacity, we support global customers with multi-variety, small-batch customization. Our expertise in turning 304 stainless steel ensures reliable performance while maintaining a strong balance between quality and cost.

Flexible Customization

We offer full customization with rapid response based on your drawings:

• Outer diameter / inner diameter

• Length and step dimensions

• Thread specifications (imperial, unified, metric, trapezoidal, and custom)

• Chamfers, radii, grooves, and special structures

Our engineering team provides fast drawing evaluation, quotation, and process planning. With no intermediaries, we ensure competitive pricing and controlled lead times for a wide range of industries.

Core Process | Stainless Steel Passivation for Enhanced Corrosion Resistance

Passivation is the key surface treatment for stainless steel components. Through controlled chemical processing, a dense and stable passive film is formed on the surface, significantly improving corrosion resistance while preserving the original mechanical properties.

Key benefits include:

• Enhanced resistance to atmospheric corrosion, fresh water, and daily moisture exposure

• Stable passive layer that prevents oxidation under mild operating conditions

• No impact on dimensional accuracy or assembly fit

• Smooth, burr-free surface ready for precision assembly without additional finishing

• Reduced processing steps and overall cost

• Compatible with additional treatments such as zinc plating, zinc-nickel plating, and chrome plating

• Environmentally compliant and aligned with industrial surface treatment standards

Salt spray resistance can reach 100+ hours, depending on application conditions.

Precision Manufacturing | CNC Turning for Stainless Steel Components

Processing parameters are optimized for stainless steel materials. One-piece machining ensures a seamless structure with no joints, achieving accurate assembly clearance and eliminating issues such as jamming, loosening, or misalignment.

Strict Precision Control

• Dimensional tolerance: ±0.02 mm

• Hole/shaft accuracy: ≤0.01 mm

• Position accuracy for steps, chamfers, and holes: ≤0.03 mm

• Thread precision: customized as required

This ensures precise fit with mating components and stable performance in assembly.

Full Quality Control System

• Material composition verification

• First article inspection during CNC machining

• In-process inspection

• CMM dimensional inspection

• Geometric tolerance inspection

• Passivation quality inspection

• Assembly fit testing

Every stage is strictly controlled to ensure 100% qualified output and consistent product quality.

Multi-Process Compatibility

While turning 304 stainless steel is the core process, additional surface treatments such as zinc plating, zinc-nickel alloy plating, and chrome plating can be applied to further enhance wear resistance and corrosion protection, depending on application requirements.

Order Support

We support both neutral packaging and custom branded packaging. Packaging includes anti-scratch protection and cushioning materials to prevent impact during transportation, fully compliant with international shipping standards.

• Lead time: 7–10 days for small batches

• 15–30 days for mass production

We provide dedicated one-to-one service, supporting global procurement needs for multi-variety, small-batch orders of turning 304 stainless steel components.

Core Performance

Dimensional Accuracy

• Diameter / hole tolerance: ±0.02 mm

• Length tolerance: ±0.03 mm

• Wall thickness tolerance: ±0.01 mm

Designed to fit compact internal assembly spaces and complex geometries such as thin shafts, irregular shapes, and multi-hole structures.

Geometric Accuracy

• Concentricity ≤0.02 mm

• Roundness ≤0.01 mm

• Perpendicularity ≤0.03 mm

• Flatness ≤0.02 mm

Ensures stable operation without vibration, misalignment, or jamming.

Protection Performance

After professional passivation treatment, components can withstand up to 200 hours of salt spray testing, offering resistance to moisture, industrial dust, and mild acids or alkalis. Suitable for both indoor and outdoor applications, reducing the risk of corrosion affecting equipment lifespan.

Mechanical Performance

Components maintain stable structural strength and are resistant to deformation under normal operating conditions, ensuring long-term reliability in transmission, positioning, and connection applications.

Design Flexibility

Custom structures such as precision drilling, dedicated thread interfaces, chamfers, and stepped features can be produced based on equipment design requirements. Engineering support for drawing optimization is also available.

Core Specifications

Category	Specification
Machining Accuracy	Dimensional tolerance ±0.02 mm, geometric tolerance ≤0.03 mm, hole/shaft accuracy ≤0.01 mm
Core Surface Treatment	Stainless steel passivation (standard process)
Optional Surface Treatments	Zinc plating, zinc-nickel alloy plating, chrome plating
Maximum Machining Size	Length ≤3000 mm, diameter φ2–φ200 mm, wall thickness 0.5–10 mm (customizable)
Lead Time	7–10 days (small batch), 15–30 days (mass production)
Packaging Standard	Neutral packaging / custom branded packaging (individual anti-scratch protection + external cushioning)

Typical Applications

Transmission Components

• Precision shafts

• Eccentric shafts

• Connection shafts

• Power output shafts

• Gear shafts

Fixing Components

• Internal sleeves

• Locking rings

• Connector sleeves

• Bearing shafts

• Positioning sleeves

Functional Components

• Precision bushings

• Threaded shafts

• Locating pins

• Snap-fit shafts

• Waterproof retaining rings

Instrumentation Components

• Precision instrument parts

• Positioning elements for testing equipment

• Industrial sensor components

• Core connector components

Our Commitment

With years of experience in stainless steel precision component manufacturing, we have developed dedicated machining and quality control standards centered on passivation technology.

From material selection to CNC machining, and from passivation treatment to final delivery, every step is strictly controlled. We provide full-process support - from drawing evaluation and process design to production follow-up and after-sales service.

With high corrosion resistance, precision, and adaptability, our solutions help global customers develop competitive products and establish long-term partnerships in precision metal manufacturing.

Customization & Support

Custom manufacturing, drawing optimization, sample delivery, and bulk quotations are all supported.
Our professional team is ready to respond quickly and support your project.