Renjie
CNC Machining

OEM Precision CNC Turning Services

Rinjie is equipped with CNC lathes, turning centers, and conventional lathes to handle complex, custom-turned parts. We provide instant cnc turning online quote services, advanced processing for intricate shapes, and free inspection reports.

◉Support for One-Off & small Batch order

◉ISO 9001 & ISO 13485 Medical certified

◉Tolerances to ±0.01mm（±0.0004)

CNC Machining CNC Milling CNC Turning Rapid Prototyping Laser Cutting Sheet Metal Fabrication Plastic Injection Molding Surface Finishing

Our Custom CNC Turning Service

Machinable motorcycle parts

Expert CNC Turning Machine Services

Renjie delivers CNC turning services from China with 15 years of machining experience. Our professional team handles quotation, production, and quality inspection—ensuring high-precision, reliable components from order to delivery.

Machinable motorcycle parts

CNC Turning Prototyping Services

We offer cost-effective CNC turning rapid prototyping services with prompt response, helping you accelerate product development and shorten the time to market.

Machinable motorcycle parts

Low-Volume CNC Milling Service

Prototyping and small batch production allow you to test your order’s design, surface treatment, and assembly before moving into mass production, helping reduce risks and flexibly respond to changing requirements.

Why Use Renjie Precision Machinery for CNC Turning Services?

Machinable motorcycle parts

High-Volume & Advanced Equipment

We deliver over 5,000+ high-precision parts per month and operate more than 40+ advanced production machines, ensuring we can meet diverse machining requirements efficiently.

Machinable motorcycle parts

Great customer service

Any issues arising during machining or after sample delivery are promptly discussed and adjusted with you, We will be at your side from design to order tracking.

Machinable motorcycle parts

Expert Problem Solving

Our experienced engineers promptly resolve any machining issues—including surface finish challenges, tight-tolerance assemblies, or complex curved component,ensuring your machining challenges are handled every time.

Types Of CNC Turning Parts

Machinable motorcycle parts

Shafts

High-precision rotating components for automotive, machinery, and equipment applications, ensuring accuracy and stable performance.

Machinable motorcycle parts

Threaded Parts

Including both internal and external threads, widely used for fastening, connecting, and transmission purposes.

Machinable motorcycle parts

Tapered Parts

Designed to meet various assembly and sealing requirements, ideal for aerospace, energy, and high-precision equipment.

Machinable motorcycle parts

Complex Geometries

Custom machining for multi-surface and special structures, meeting unique design requirements of clients.

CNC Turning Materials

We provide a wide selection of CNC milling materials, ranging from titanium, aluminum, and stainless steel to high-performance insulating plastics. By partnering with trusted Materials suppliers, we carefully source premium materials to ensure quality for every project. Contact us.

Metals
Aluminum/Aluminum Alloy Titanium / Titanium Alloy Stainless steel
Steel Alloy Mild steel Copper
Brass Tool steel Inconel
Engineer Plastic
ABS FR4 G-10
Nylon PEEK PEI
PET PMMA (Acrylic) Polycarbonate
Polyethylene Polypropylene PoM (Delrin/Acetal)
PPSU PTFE (Teflon) PVC

CNC Turning Tolerances

We deliver CNC turned parts with both standard (±0.1mm) and tight tolerances (±0.005mm), balancing cost efficiency with high precision. Whether for general applications or advanced products, our CNC turning services guarantee every component meets your exact specifications.

Standards CNC Turning
Maximum Part Size Φ300x300mm
Minimum Part Size Φ1*50mm
Standard Tolerances ±0.01mm
Linear Dimension ±0.0.1mm
Hole Diameters (Not Reamed) ±0.005mm
Shaft Diameters ±0.005mm
General Tolerances ±0.1mm
Edge Condition *Sharp corner will be removed in the form of a chamfer or radius. The size of the chamfer, or resulting radii, must be indicated on the drawing.
Threads and Tapped Holes Diameter: Φ 1.5-5 mm, depth: 3×diameter
Diameter: Φ 5 mm or more, depth: 4-6×diameter
*Renjie can produce threads of any specification and size required by our customers.
Text Renjie can use laser marking to create standard text for CNC turned parts.

Surface Finishing

  • Anodizing

    RENJIE has its own oxidation plant and is a specialist in anodized aluminium, magnesium and titanium. Anodizing not only provides a beautiful appearance color, but also increases the hardness and durability of the workpiece, and in some cases, it’s a more ideal finish than painting.

  • Sandblasting

    Sandblasting sprays fine sand to the workpiece through high-pressure airflow, which can form a unique texture while removing burrs and stains on the surface of the workpiece. Sandblasting can be used as a final treatment, or be prepared for subsequent surface treatment to increase the bond strength between the workpiece and the coating/plating.

  • Painting

    RENJIE has specific painting equipment, which can spray the product from any direction. Thousands of colors can be prepared by experienced sprayers, and the surface effect can be selected from matte, semi-gloss and full-gloss finishes, ensuring that the spraying quality can satisfy customers’ requirements.

  • Powder Coating

    Use professional equipment to spray electrostatic powder on the surface of the workpiece to form a uniform coating with different effects. RENJIE always insists on protecting the ecological environment, and carries out environmentally friendly production on powder coating, so that the entire production process can reach a pollution-free state.

  • PVD

    PVD is an environmentally friendly process. The plated film has the characteristics of high hardness, wear resistance, corrosion resistance, high chemical stability and long life. It can be plated with various film colors and finishes, which greatly improves the appearance of the workpiece.

  • Electrophoresis

    This process can obtain a uniform and smooth paint film on the inner layer, depression, welding seam and other parts of each component, which solves the problem of painting complex-shaped workpieces by other painting methods, and the product has a long-lasting bright color and works well on corrosion resistance.

  • Electroplating

    Electroplating includes vacuum electroplating, UV electroplating, plastic electroplating, and metal electroplating; its technology is widely used, suitable for mass production, and is easier to mechanize and automate production.

  • Passivation

    Passivation has the characteristics of not increasing the thickness of the workpiece and changing the color, improving the precision of the product and the anti-corrosion ability of the metal, and also maintaining the characteristics of the metal surface and increasing its added value.

  • Laser Engraving

    The marked logo and pattern of RENJIE’s laser engraving have outstanding features such as exquisite, clear, beautiful, and permanent, and will not fade or wear due to touch, temperature, etc. Laser engraving can engrave complex patterns and images on metal and non-metal materials.

  • Silkscreen Printing

    RENJIE’s silkscreen printing can be freely adjusted with various inks and coatings, so that the silk printing pattern can achieve a colorful, bright and strong three-dimensional effect. And the printing method can be used in various materials and shapes.

Surface Finishing - Anodizing
Surface Finishing - Sandblasting
Surface Finishing - Painting
Surface Finishing - Powder Coating
Surface Finishing - PVD
Surface Finishing - Electrophoresis
Surface Finishing - Electroplating
Surface Finishing - Passivation
Surface Finishing - Laser Engraving
Surface Finishing - Silkscreen Printing

FAQS

  • Q1: What is CNC Turning?

    A:The CNC turning is a controlled machine and process of machining a rotating part with a cutting tool and used to create shafts, tapered components, threaded parts, or intricate custom shapes.

  • Q2: What is the typical turnaround time for the CNC turning project?

    A: For general components, the delivery time is 15 days. For urgent items, it is approximately 3 to 7 days. For massive production, the delivery time will be determined based on specific circumstances.

  • Q3: What are the advantages of CNC Turning?

    A:High precision: standard tolerance ±0,1mm（±0.004"）, high-precision parts up to +0.01mm（±0.0004"） Wide material compatibility: metals and engineering plastics Supports prototyping and low-volume production Fast delivery with free inspection reports

  • Q4: Which materials can you CNC turn?

    A:We can machine a wide range of metals including stainless steel (e.g., 304, 316), aluminum (e.g., 6061, 7075), titanium (e.g., Ti-6Al-4V), brass (e.g., C36000), copper (e.g., C11000), and alloy steel (e.g., 4140, 4340), as well as engineering plastics such as ABS, POM (Delrin®), Nylon (PA6/PA66), PEEK, and PVC.

By continuing to use the site you agree to our privacy policy

I agree