Custom Turned Parts: Precision CNC Turning Services

Get precision CNC turned parts for prototyping and production with RALLY, delivering top-quality metal and plastic components as quickly as 2-3 day. Start with an instant online quote.

Multi-axis Turning Centers

Custom Complex CNC Turned Parts

At Rally, we understand that it is essential to meet the technical specifications of customers’ orders in an accurate and timely manner. To do so, we use ISO standard inspection techniques and provide Computer Measuring Machine (CMM) reports for our customers’ review. Additionally, our team runs thorough dimensional inspections on the manufactured parts to ensure each piece is error-free. We can also offer either a 2D or 3D scan depending on the customer's Computer-Aided Design requirements. To further ensure top quality metal parts, excellent raw materials are used therefore only reliable CNC turning techniques are applied. Nevertheless, we maintain the highest safety and quality standards set by ISO9001-2015 when producing CNC turned parts in high volume quantities.

Machining Parts Manufacturer

Reliable Turned Parts Supplier- RALLY

Rally offers unparalleled precision and reliability as a trusted supplier of high quality turned parts. We specialize in making parts that strictly adhere to specified shape, size and material requirements, ensuring optimal fit and function. Our parts stand out for their exceptional performance characteristics and durability, and are designed to withstand specific mechanical impacts. With Rally, you get a partner committed to quality, precision and customer satisfaction.

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Precision CNC Turning Processes

Precision CNC (Computer Numerical Control) turning operations involve various techniques to shape, cut, and finish metal or plastic parts with high accuracy. These operations are performed on a CNC lathe or turning center, where the material is rotated while a cutting tool is fed into it in a precise, controlled manner. 

cnc turning center
CNC drilling stainless steel machining service

Key precision CNC turning operations include:

  1. Turning: The fundamental operation where the exterior surface of the material is cut to produce a cylindrical shape. It can reduce the diameter of a part to a specific dimension.

  2. Boring: This operation enlarges an existing hole or cylindrical cavity, making it more accurate in diameter.

  3. Drilling: Used to create or refine holes in the workpiece. A drill bit is fed into the rotating material to make a hole of a desired diameter.

  4. Facing: This process trims the end of the workpiece to create a flat surface. It's typically the first step in the turning process to ensure the end face is perpendicular to the workpiece's axis.

  5. Grooving: Cutting a groove or channel into the workpiece. Grooving tools are used to machine inner, outer, and face grooves.

  6. Knurling: A non-cutting operation that creates a textured pattern on the workpiece surface, often for grip. It involves pressing a knurling tool against the rotating workpiece.

  7. Parting/Cutting Off: Separating a part from the rest of the workpiece by cutting through it. This operation is performed with a narrow, straight tool.

  8. Threading: Cutting threads on the internal or external surface of a workpiece, enabling the assembly of parts. Both metric and imperial threads can be produced.

  9. Secondary Operations: These might include grinding, polishing, or finishing processes that are not part of the primary CNC turning but are performed to achieve the desired surface finish or dimensional accuracy.

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CNC Turning Part Product List

Creating a comprehensive product list for CNC turning parts involves specifying various dimensions, materials, and applications that these parts can cater to CNC (Computer Numerical Control) turning is a manufacturing process where bars of material are held in a chuck and rotated while a tool is fed to the piece to remove material to create the desired shape. It's widely used for producing parts with cylindrical features.

Gears CNC Turned Parts

Gears CNC Turned Parts

Custom gears for automotive transmissions, industrial machinery, and consumer products.

Flanges CNC Turned Parts

Flanges CNC Turned Parts

Commonly used in plumbing, construction industries for connecting pipes, valves, and pumps.

Bushing CNC Turned Parts

Bushing CNC Turned Parts

Widely used in automotive and industrial machinery to provide a wear surface for rotary applications.

Pins CNC Turned Parts

Pins CNC Turned Parts

Including dowel pins, hinge pins, and shafts, used in mechanical engineering and construction.

Screws CNC Turned Parts

Screws and Bolts CNC Turned Parts

Customized threading and dimensions for specific applications in all industries.

Pulleys CNC Turned Parts

Pulleys CNC Turned Parts

Used in belt drives across automotive, industrial machinery, and consumer appliances.

Shafts CNC Turned Parts

Precision Shafts CNC Turned Parts

Used in automotive, aerospace, and machinery for transmission systems.

Knobs CNC Turned Parts

Knobs CNC Turned Parts

Customized for machinery, electronic devices, and consumer products for functional control.

Fitting CNC Turning Parts

Fittings CNC Turned Parts

Custom connectors and adapters for hydraulic, pneumatic, and fluid systems in various industries.

Valve Components CNC Turned Parts

Valve Components CNC Turned Parts

Including valve bodies, stems, and bonnets for the oil and gas, water treatment, and chemical processing industries.

Washers CNC Turned Parts

Washers CNC Turned Parts

Precision flat disks with a hole, used to distribute the load of a threaded fastener, such as a screw or nut.

Spacers CNC Turned Parts

Spacers CNC Turned Parts

Used in aerospace, automotive, and electronics for creating precise distances between components.

CNC Turning Common Materials

The Material Selection section delves into the wide array of metals and plastics available for CNC turning, tailored to meet diverse project needs. Metals offer durability and heat resistance, suitable for automotive and aerospace parts, while plastics provide flexibility and cost-efficiency, ideal for rapid prototyping and custom applications.

Material CNC Machining
machining parts of brass material
machining parts of stainless steel material
machining parts of plastic material

Metal Materials For CNC Turned Parts:


  • Characteristics: Lightweight, excellent machinability, good corrosion resistance, and thermal conductivity.
  • Applications: Aerospace components, automotive parts, electronic housings, and consumer goods.

Stainless Steel

  • Characteristics: High strength, excellent corrosion resistance, and capable of withstanding high temperatures.
  • Applications: Medical devices, food processing equipment, marine parts, and automotive components.

Carbon Steel

  • Characteristics: High strength, relatively low cost, and good machinability. The corrosion resistance is lower than stainless steel but can be improved with coatings.
  • Applications: Structural components, fasteners, automotive parts, and industrial machinery.

Alloy Steel

  • Characteristics: Alloyed with other elements (e.g., chromium, nickel, molybdenum) to enhance specific properties like strength, hardness, wear resistance, and toughness.
  • Applications: Gears, shafts, high-strength fasteners, and aerospace components.


  • Characteristics: Easy to machine, good corrosion resistance, and excellent electrical conductivity.
  • Applications: Plumbing fittings, electrical components, decorative items, and musical instruments.


  • Characteristics: Excellent electrical and thermal conductivity, corrosion resistance, and machinability.
  • Applications: Electrical connectors, heat sinks, radiators, and decorative items.


  • Characteristics: High strength-to-weight ratio, excellent corrosion resistance, and bio-compatibility.
  • Applications: Aerospace components, medical implants, automotive parts, and sports equipment.


  • Characteristics: High strength, excellent wear and corrosion resistance, and good machinability.
  • Applications: Bearings, bushings, marine hardware, and sculptures.

Plastic Materials For CNC Turned Parts:


  • Characteristics: Good mechanical properties, excellent impact resistance, and easy to machine.
  • Applications: Automotive components, consumer goods, and electronic enclosures.

Nylon (Polyamide, PA)

  • Characteristics: High strength and stiffness, good abrasion resistance, and excellent wear properties.
  • Applications: Gears, bearings, rollers, and insulators.

Polycarbonate (PC)

  • Characteristics: High impact strength, transparency, and good temperature resistance.
  • Applications: Protective covers, lenses, and medical devices.

PTFE (Teflon)

  • Characteristics: Exceptional chemical resistance, very low friction coefficient, and high-temperature resistance.
  • Applications: Seals, gaskets, and sliding components in chemical and thermal applications.

POM (Acetal, Delrin)

  • Characteristics: High stiffness, low friction, and excellent dimensional stability.
  • Applications: Precision gears, bearings, and structural components requiring tight tolerances.

PE (Polyethylene)

  • Characteristics: Good chemical resistance, low water absorption, and varies from soft and flexible (LDPE) to strong and rigid (HDPE).
  • Applications: Containers, chemical tanks, and wear parts.

PMMA (Acrylic)

  • Characteristics: Excellent optical properties, good weather resistance, and shatterproof alternative to glass.
  • Applications: Light fixtures, lenses, and transparent covers.

PVC (Polyvinyl Chloride)

  • Characteristics: Good chemical and corrosion resistance, high mechanical strength, and easy to machine.
  • Applications: Pipes, fittings, and medical devices.


  • Characteristics: Good dimensional stability, high strength and stiffness, and good chemical resistance.
  • Applications: Mechanical parts, containers, and in applications requiring high wear resistance.
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Surface Finish for Turned Parts

Surface finish for turned parts is a critical aspect of machining that affects the functionality, aesthetics, and performance of the component. It refers to the texture, roughness, and cosmetic appearance of the part's surface after machining. Various factors influence the surface finish, including the material being machined, the type of cutting tool, cutting speed, feed rate, and the machining process itself. Here are some common surface finish options and techniques used for CNC turned parts:

Metal Surface Finishing
Chemical Metal Surface Finishing
surface treatments for aluminum parts
Metal Surface Finishing: Powder Coated Automotive Wheels Surface Treatments for Aluminum Parts

As-Machined Finish

  • Description: The natural finish left after machining without any additional post-processing. The quality of the as-machined surface can vary based on the tooling and parameters used.
  • Applications: Suitable for parts where surface roughness is not critical to the part's function.

Polished Finish

  • Description: Achieved by mechanically polishing the part to reduce surface roughness and achieve a shiny appearance. Higher levels of polishing can result in a mirror-like finish.
  • Applications: Used for aesthetic components or where smooth surfaces are necessary for reducing friction or improving cleanliness.

Anodized Finish

  • Description: An electrochemical process that converts the metal surface into a durable, corrosion-resistant, anodic oxide finish. Anodizing is common for aluminum parts and can add color.
  • Applications: Ideal for parts exposed to harsh environments, requiring improved corrosion resistance or specific aesthetic needs.

Powder Coated Finish

  • Description: A dry finishing process where a powder coating is applied electrostatically and then cured under heat. It provides a thick, uniform coating that is tougher than conventional paint.
  • Applications: Suitable for parts needing high durability, corrosion resistance, and a wide range of color options.

Bead Blasted Finish

  • Description: Achieved by blasting the surface of the part with small glass or ceramic beads, resulting in a uniform matte or satin surface finish.
  • Applications: Ideal for hiding machining marks and improving the part's aesthetic without significantly changing its dimensions.

Electroplated Finish

  • Description: A process where a metal layer (such as nickel, chrome, or gold) is deposited on the part's surface through electrochemical means. This can improve corrosion resistance, wear resistance, and electrical conductivity.
  • Applications: Commonly used for decorative finishes, electrical conductivity enhancements, or corrosion resistance.


  • Description: A chemical treatment for stainless steel and other metals to remove surface contaminants and enhance corrosion resistance by forming a passive oxide layer.
  • Applications: Essential for medical devices, food processing equipment, and any application where maximum corrosion resistance is necessary.

Brushed Finish

  • Description: Produced by brushing the metal surface with a coarse abrasive material to create a directional satin finish. It is less reflective than a polished finish.
  • Applications: Common for decorative applications or for reducing the appearance of fingerprints and minor imperfections.

Advantages of CNC Turning

Rapid Turnaround

This rapid processing capability ensures that projects can move swiftly from design to finished product, meeting tight deadlines and reducing time-to-market for new innovations.


High precision ensures that each part meets stringent specifications, leading to better fit, function, and longevity in the final product, which is crucial for critical applications in aerospace, medical, and automotive industries.

Custom Finishes

Can meet the exact finish requirements of their customers, whether for cosmetic appeal, corrosion resistance, enhanced durability, or other surface properties.


This scalability makes CNC turning a cost-effective solution for both short-term custom projects and long-term high-volume manufacturing, allowing businesses to adapt quickly to changing market demands or production levels.

Material Selection

The ability to choose from a broad range of materials allows for the optimization of part performance for its intended application, ensuring the best balance of cost, durability, and functionality.

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Industries for CNC Turned Parts

CNC turning finds its applications across a multitude of industries due to its precision, efficiency, and flexibility in producing cylindrical and complex parts. Here’s a look at some of the key applications of CNC turning:

Aerospace Industry - Machined Parts Manufacturer


  • Components: Engine parts, landing gear components, bushings, fasteners, and other critical precision components.
  • Features: High-strength, lightweight materials with tight tolerances and specific surface finishes for durability and performance in extreme conditions.
Automotive Industry - Precision Machining Services


  • Components: Engine components (camshafts, crankshafts), transmission parts, suspension components, and custom fasteners.
  • Features: High precision and reliability are crucial for safety and performance, with materials ranging from aluminum to high-grade steel and composites.
Industrial Machinery

Industrial Machinery

  • Components: Gears, bearings, shafts, and other mechanical components.
  • Features: Machining of a wide range of materials to produce parts that can withstand the rigors of industrial use.
Medical Electronics Industry - Precision Machining Services


  • Components: Orthopedic implants (screws, plates), surgical instruments, and components for diagnostic equipment.
  • Features: Biocompatible materials with extremely high precision and smooth finishes to ensure patient safety and device efficacy.
Electronics -Machined Parts Manufacturer


  • Components: Enclosures, heat sinks, connectors, and components for consumer electronics and industrial equipment.
  • Features: Precision machining of conductive and non-conductive materials, often requiring tight tolerances for fit and electrical performance.
Consumer Products

Consumer Goods

  • Components: Components for sporting goods, home appliances, and other consumer products.
  • Features: Aesthetic as well as functional machining, often using materials that offer a good balance between cost, durability, and performance.
Start Your Project with RALLY Today

Ready to elevate your projects with the precision and quality of RALLY's CNC turning services? Our team is here to turn your vision into reality. Contact us today to discuss your needs and discover how we can support your success.

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A Comprehensive Guide to CNC Turned Parts

Rally Precision is passionate about providing customers with high precision and advanced CNC turning solutions. Rally Precision's highly trained staff guides you through every aspect of CNC turning operation. We make sure our customers make smart choices for their prototype and volume orders. To make it easier for you, here's a complete guide to CNC Turning.

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