Custom CNC Machining Parts Supplier

  • Rapid response to customers
  • Flexible Low-Volume Manufacturing
  • Good product quality and strict tolerance control
  • On-time Delivery – As Quick as 3 working days
what-is-cnc

Why Choose Our Customized CNC Machining Parts

KENENG owns a 3000 square meter CNC machining workshop and more than 60 employees with relevant skills, 16 high-performance CNC machining equipment. We provide Milling, Turning, Drilling, Threading, Tapping, EDM and Wire EDM, Custom Finishing, Prototyping, Small Batch or One-off Parts Machining, Modification of Existing Parts services. More than 300 machining projects and 200000 machined parts output per month, 24/7 online service for before and after sales. We don’t just make parts; we manufacture solutions built for your success.

1. Unmatched Precision and Strict Tolerances

Your designs demand accuracy, and we deliver it. Our advanced CNC mills, lathes, and multi-axis machining centers produce parts with exceptional dimensional accuracy, holding tolerances as tight as ±0.001″ (0.025mm). Whether you need a simple bracket or a complex, intricate prototype, you can be confident every part will be made to your exact print specifications, every time.

2. Extensive Material Expertise

We provide access to a vast inventory of over 200 metal and plastic materials. From common alloys like Aluminum 6061 and Stainless Steel 304 to exotic metals like Titanium and Inconel, or engineering plastics like PEEK and Ultem, we have the material knowledge to help you select the optimal one for your application’s strength, weight, thermal, and chemical resistance requirements.

3. True Design Freedom and Complexity

CNC machining unlocks geometries that are impossible with other manufacturing methods. We specialize in producing complex parts with intricate features, deep cavities, undercuts, and precise internal channels. Our 5-axis machining capabilities allow us to complete complex parts in a single setup, reducing lead times and improving overall quality.

4. Rapid Prototyping to Full Production

We are your agile manufacturing partner. Need a single functional prototype for testing next week? Or 10,000 parts for a production run? Our scalable infrastructure and efficient workflows allow us to deliver high-quality parts fast, supporting you at every stage of your product development lifecycle.

5. Superior Quality and Rigorous Inspection

Quality isn’t just a step in our process; it’s embedded in our culture. We employ a comprehensive quality management system and utilize state-of-the-art metrology equipment, including CMM (Coordinate Measuring Machines) and optical comparators, to verify that every custom part meets our stringent quality standards and your specific requirements.

6. Technical Expertise and Design for Manufacturability (DFM)

When you work with us, you gain more than a machine shop; you gain a partner. Our team of experienced engineers will review your designs and provide valuable Design for Manufacturability (DFM) feedback at no extra cost. We help optimize your part for cost-effectiveness, manufacturability, and performance, potentially saving you time and money.

7. Competitive Pricing & On-Time Delivery

We leverage our manufacturing efficiency and sourcing power to provide you with the best possible value without compromising on quality. We understand that your project runs on a schedule, and we are committed to meeting our promised on-time delivery dates, ensuring your operations run smoothly.

8. Certificates

certificate of CNC machining-1
certificate of CNC machining-5

Our CNC Machining Products Display

KENENG CNC Machining Products Display
KENENG CNC Machining Products Display

CNC Machining Capabilities

1. Core Machining Technologies

Our shop floor is equipped with a range of state-of-the-art CNC equipment to meet diverse manufacturing needs.

CNC Milling: 3, 4 & 5-Axis

  •   3-Axis: Ideal for parts with simpler geometries, producing prismatic shapes with high accuracy and excellent surface finishes.
  •   4-Axis: Adds a rotary axis, allowing for machining on multiple sides of a part in a single setup. Perfect for features like cam shafts or continuous profiles.
  •   5-Axis: Our flagship capability for complex parts. Allows simultaneous machining from five sides in a single setup, enabling the production of intricate contours, compound angles, and deep cavities with unparalleled efficiency and precision.

CNC Turning: 2-Axis & Multi-Axis Lathes

  •   2-Axis: Efficiently produces cylindrical parts, delivering excellent concentricity and surface finishes for shafts, pins, and bushings.
  •  Live Tooling (Mill-Turn): Combines turning and milling operations in a single machine. This allows us to complete complex parts (e.g., with off-center holes, flats, or slots) much faster and with higher accuracy than using separate machines.
  • Swiss-Type Screw Machining: Specialized for high-volume production of small, complex, and high-precision cylindrical parts (typically under 1.25″ diameter). Excellent for medical components, electronics, and fasteners, offering exceptional tolerances and reduced secondary operations.

2. Material Expertise

We machine a comprehensive range of over 50+ material types, including:

  • Metals: Aluminum, Stainless Steel (303, 304, 316, etc.), Alloy Steel, Tool Steel, Brass, Copper, Titanium, Inconel, and other exotic alloys.
  • Plastics: ABS, Nylon (PA6, PA66), Delrin (POM), PEEK, PTFE (Teflon), Polycarbonate, Ultem (PEI), and PVC.

3. Key Technical Specifications

Our commitment to precision is demonstrated through our measurable capabilities:

Capability Specification

  • Standard Tolerances ±0.005″ (±0.127 mm)
  • Tight Tolerances As tight as ±0.0005″ (±0.0127 mm)
  • Maximum Part Size Up to 48″ x 24″ x 24″ (Milling)
  • Multi-Axis Machining Full 5-Axis Simultaneous Machining
  • Surface Finish From Ra 32 μin (as-machined) to Ra 2 μin (with finishing)

Achievable tolerances are dependent on part geometry, material, and volume. Our engineers will provide guidance during the DFM review.

4. Value-Added Services & Finishing

We are a one-stop solution, providing comprehensive post-processing and finishing to deliver parts that are ready for use.

Secondary Operations

Deburring, tapping, honing, and assembly.

Surface Finishes:

  • Bead Blasting: Uniform matte or satin finish.
  •   Anodizing (Type II & III): For aluminum, providing corrosion resistance and wear resistance in various colors.
  •   Plating: Nickel, Chrome, Zinc, and Electroless Nickel for hardness and corrosion resistance.
  •   Passivation: For stainless steel to enhance corrosion resistance.
  •   Powder Coating & Painting: Durable and aesthetic color coatings.

Heat Treating

Annealing, Stress Relieving, Quenching & Tempering to alter material properties for strength and durability.

Materials Used for CNC Machining Parts

1. Metal materials: stainless steel, carbon steel (including various alloy steels), copper (including brass, red copper, beryllium copper, bronze and other special copper), aluminum alloy, titanium alloy and other special steel.

2. Insulation material: POM, nylon, acrylic, PC, PEEK, PF.

Stainless Steel CNC Part products

Steel grades that are resistant to weak corrosion media such as air, steam, water, etc., or have stainless properties are called stainless steels, and steel grades that are resistant to corrosion by chemical media such as acids, alkalis, and salts are called acid-resistant steels.

Generally, ordinary stainless steel is not resistant to corrosion by chemical media, but generally, acid-resistant steel is stainless. Stainless steel has good corrosion resistance and high hardness.

303SS CNC
303SS CNC
316SS CNC
316SS CNC
Stainless steel CNC parts
Stainless steel CNC parts
Stainless steel CNC parts
Stainless steel CNC parts
Stainless steel CNC
Stainless steel CNC

Al-alloy CNC Part Products

Aluminum alloys are alloys based on aluminum with a certain amount of other alloying elements added. Aluminum alloys have the general characteristics of aluminum, and in addition, they have some alloy characteristics depending on the type and quantity of alloying elements added. Generally, aluminum alloys have good electrical conductivity, thermal conductivity, corrosion resistance, and weldability, as well as good casting properties and plastic workability.

6061 Al-alloy Anodize Black
6061 Al-alloy Anodize Black
Al-alloy Anodize Red
Al-alloy Anodize Red
7075 Al-alloy
Aluminum alloy anode
Al-alloy
Al-alloy

Brass CNC Part Products

Brass means an alloy composed of copper and zinc. Ordinary brass is only composed of copper and zinc, and if it is composed of more than two elements, it is called special brass. Generally, brass has strong wear resistance.

Brass screw CNC
Brass screw CNC
H62 Brass CNC large piece
H62 Brass CNC large piece
Brass parts
Brass parts
Brass parts
Brass parts

Copper CNC Part Products

Pure copper is a soft metal. Copper has good ductility and good thermal and electrical conductivity.

Copper Parts
Copper Parts

Plastic CNC Part Products

Plastic CNC Parts are precision-machined components made from high-quality plastics, offering excellent accuracy, durability, and versatility.


Plastic CNC parts
Plastic CNC parts

Other Services Provided by KENNEG

FAQs for CNC Machining Parts

CNC(Computer Numerical Control) machining is a subtractive manufacturing process where pre-programmed computer software dictates the movement of factory tools and machinery. It can control a range of complex machinery, from lathes and mills to routers and grinders, to create custom-designed parts from a solid block of material (like metal or plastic) with high precision.

  • 3-Axis: The cutting tool moves in three linear directions (X, Y, and Z). It’s excellent for parts with relatively simple geometries and is generally the most cost-effective option.
  • 5-Axis: The cutting tool can move in three linear directions and the part can rotate on two additional axes. This allows us to machine complex shapes in a single setup, reducing lead time and potential errors, and enabling the production of highly intricate parts (e.g., turbine blades, impellers).

We can machine a wide variety of over 50+materials, including:

  • Metals: Aluminum (e.g., 6061, 7075), Stainless Steel (e.g., 303, 304, 316), Steel, Brass, Copper, Titanium.
  • Plastics: ABS, Delrin (POM), Nylon (PA6), PEEK, PTFE (Teflon), Polycarbonate, Ultem (PEI).
  • Contact us if you have a specific material requirement not listed here.

You can get aninstant, interactive quote in minutes by uploading your CAD file to our secure online platform. The system will analyze your design and provide pricing and lead time options. For complex projects or assemblies, a member of our team may contact you within a few hours with a detailed, personalized quote.

The cost is determined by several key factors:

  • Part Design: Complexity, size, and required tolerances.
  • Material: Type and cost of the raw material block.
  • Machining Time: How long the machine runs to produce the part (the biggest cost driver).
  • Setup Time: Time required for programming and machine setup.
  • Quantity: Volume of parts ordered.
  • Post-Processing: Additional finishes (anodizing, plating, etc.).

Our standard machining tolerance is±0.005″ (±0.127 mm), which is suitable for most non-critical features. We can hold much tighter tolerances, down to ±0.0005″ (±0.0127 mm), for critical features when specified. Please note that tighter tolerances can increase cost and should only be applied where absolutely necessary.

Yes,we are a full-service shop. We offer a wide range of in-house and partnered finishing services, including:

  • Aesthetic & Protective: Anodizing (Type II & III), Powder Coating, Plating (Nickel, Zinc)
  • Functional: Passivation, Heat Treating, Bead Blasting.
    You can select your finish directly during the online quoting process.

Quality is integral to our process. We employ a multi-stage QC system that includes:

  • First Article Inspection (FAI): Comprehensive measurement of the first part off the machine.
  • In-Process Checks: Regular checks throughout the production run.
  • Final Inspection: Using precision tools like CMM (Coordinate Measuring Machines), calipers, and micrometers to verify your part meets all print specifications.

Lead times vary based on part complexity and order volume.

  • Simple Prototypes: As fast as 3-5 working days.
  • Standard Lead Time: 5-10 working days.
  • High-Volume Production: Depending on quantity, typically 3-4 weeks.

Expedited options are often available—please inquire.