Complete Guide to CNC Machining Parts & Components

by Norm Grimberg | Nov 14, 2023 | CNC Machined Parts, CNC Machining, CNC Machining Guides

In the world of industrial production, the art and science of machining play a pivotal role in transforming raw materials into finely crafted components that drive a multitude of industries.

CNC machining is suitable for a range of metals and other materials and machined parts can be fabricated quickly with no tooling required. These machined parts are prevalent across industries as they are cost-effective for demanding applications.

We at MDA know the importance of machining parts and components. We believe that every client has different needs and to fulfil them, we use intricate CNC machining parts that are ideal for the project.

In this guide, we are going to cover machining parts, types of machining parts, advantages, applications, and more.

What are CNC Machining Parts?

CNC machining parts can be made from various materials, including metals, plastics, and composites. The design specifications for these parts are programmed into the CNC machine, which then follows these instructions to cut, shape, and form the raw material into the desired final product. CNC machining is widely used in industries such as aerospace, automotive, medical, and electronics due to its ability to produce parts with tight tolerances and high accuracy.

Examples of CNC machining parts include:

Precision Components
Prototypes
Tooling and Dies
Custom Parts

Why use CNC Machining Parts?

There are plenty of reasons why industries, product designers and other professionals might use machining parts, as they offer plenty of flexibility. In short, machining parts have excellent strength and they can be made into a wide range of shapes.

Industries also use machining parts because machining is a tried-and-tested manufacturing technique that has been the industry standard for decades. Machining parts are therefore likely to meet industry-specific standards and certifications. Let’s first, check out the machining techniques and processes.

What are Machining Techniques and Processes?

Machining encompasses a variety of techniques and processes used to shape raw materials into finished parts and components. Here are some key machining techniques and processes:

#1. Turning

In turning, a workpiece rotates while a cutting tool removes material to create cylindrical shapes. This process is commonly used for producing shafts, rods, and other cylindrical components.

Applications: Turning is widely employed in the production of parts like bolts, screws, and bushings.

#2. Milling

Milling involves the use of rotary cutters to remove material from a workpiece, creating complex shapes, slots, and holes. It can be performed in various directions, including vertical, horizontal, and multi-axis milling.

Applications: Milling is versatile and manufactures components such as gears, brackets, and engine parts.

#3. Drilling

Drilling is a machining process that creates holes in a workpiece using a rotating drill bit. The drill bit is pressed against the workpiece to remove material.

Applications: Drilling is a fundamental process for creating holes in components like engine blocks, panels, and structural elements.

#4. Grinding

Grinding uses abrasive particles to remove material from a workpiece, achieving tight tolerances and smooth finishes. It is employed for precision machining where high surface quality is critical.

Applications: Manufacturers commonly use grinding for finishing operations on components such as bearings, molds, and cutting tools.

#5. CNC Machining

CNC (Computer Numerical Control) machining involves the use of computer programs to control machine tools. It includes processes like milling, turning, and drilling, and allows for precise and automated production.

Applications: Industries utilize CNC machining to produce complex and high-precision components.

#6. Laser Cutting

Laser cutting uses a focused laser beam to cut through materials. It is a non-contact process that produces clean and precise cuts.

Applications: Manufacturers widely use laser cutting to create intricate patterns and shapes in materials like sheet metal, acrylic, and wood.

#7. Electrical Discharge Machining (EDM)

EDM uses electrical discharges to remove material from a workpiece. It is suitable for machining conductive materials and can create intricate shapes with high precision.

Applications: Manufacturers often use EDM to produce molds, dies, and components with complex geometries.

What are the Advantages of Machining Parts?

Machining parts offers several advantages, making it a widely used manufacturing process across various industries. Here are some key advantages of machining parts:

#1. Precision and Accuracy

Machining processes, especially those involving CNC technology, offer high precision and accuracy. This is crucial for industries where tight tolerances and exact measurements are essential, such as aerospace and medical device manufacturing.

#2. Versatility in Materials

Machining can be applied to a wide range of materials, including metals, plastics, and composites. This versatility allows for the production of components with diverse material properties to meet specific application requirements.

#3. Wide Range of Applications

Machining is suitable for a broad spectrum of applications, from producing simple components to complex and intricate parts. It is employed in industries such as automotive, aerospace, electronics, and healthcare.

#4. Surface Finish Quality

Machining can achieve high-quality surface finishes, meeting aesthetic and functional requirements. This is important in industries where the appearance of the final product is a critical factor.

#5. Machining Complex Shapes

Machining processes, especially with advanced CNC technology, can create intricate and complex shapes that may be challenging or impossible with other manufacturing methods.

What are the Applications of Machining Parts?

Machining parts find widespread applications across various industries due to their versatility, precision, and ability to produce complex components. Here are some common applications of machining parts:

#1. Aerospace Industry:

Manufacturers extensively use machined parts in aircraft and spacecraft, including engine parts, structural elements, and intricate systems requiring high precision.

#2. Automotive Industry:

Machining is vital for producing automotive components, including engine parts, transmission components, brake systems, and various other precision parts used in vehicles.

#3. Medical Devices:

The medical industry relies on machining for manufacturing components such as implants, surgical instruments, prosthetics, and intricate medical device parts requiring high precision and biocompatibility.

#4. Electronics and Electrical Components:

Machining plays a crucial role in the production of electronic components, including connectors, circuit board parts, and housings for electronic devices.

#5. Industrial Machinery:

Manufacturers machine numerous parts in industrial machinery, such as gears, bearings, and shafts, to precise specifications to ensure smooth operation and efficiency.

| Also Read: Importance of CNC Parts in the Manufacturing Industry

How does MDA help with CNC Machining Parts and Components?

Opting for MDA for your CNC machining parts offers numerous advantages:

Precision and Accuracy:

MDA excels in the intricacies of CNC machining, utilizing cutting-edge machinery and extensive expertise to deliver parts with meticulous precision and exact dimensional accuracy.

Quality Assurance:

Rigorous quality control measures are integral to our processes, ensuring that each part not only meets but exceeds specified requirements while maintaining freedom from defects.

Experience and Skill:

With a wealth of experience, MDA possesses the necessary skills to proficiently handle intricate machining projects, encompassing multiple operations and specialized finishes with precision.

Material Selection:

MDA aids in the selection of materials tailored to your part requirements, considering factors like strength, durability, and dimensional stability to ensure optimal performance.

Cost Savings:

Choosing MDA for your machining needs translates into cost savings. Outsourcing to us alleviates the burden of equipment and personnel costs, mitigating the risks associated with production downtime and scrap expenses.

In conclusion, collaborating with MDA guarantees you access to expertise, operational efficiency, and superior quality, enabling the production of CNC machined parts that not only meet but exceed your specifications and deadlines.

Enhance precision and efficiency with MDA’s CNC machining. Elevate your manufacturing – Talk to our expert.

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Benefits of Custom Machined Parts for Business Success

by admin | Jan 22, 2020 | CNC Machined Parts, CNC Machining, Custom Machined Parts

Custom machined parts are manufactured through the process of machining. Machining is a manufacturing process that involves the processing of a work-piece into a part of the desired shape and size by removing material through the use of machine tools. Work-pieces that are machined are made up of materials such as metals, plastics, rubbers, etc. In this blog, we’ll cover the benefits of custom machined parts.

Metal machined parts provide a common example of a machining process. Making plastic machined parts is a very different process than metal machining. For machinists, working with different materials means facing different challenges, which requires the selection of different tools, parameters and techniques.

To get high-quality machined parts, a business can take the services of a CNC machine shop that has vast experience in machining. Custom machined parts offer many benefits such as –

Client’s Requirements Are Fully Met

Customized parts made through the process of machining fully meet the requirements of a business. They are manufactured according to the exact specifications given by a client to a machine shop. An expert machine shop can easily manufacture custom parts having complex shapes.

Extreme Accuracy

Machined parts manufactured using CNC technology are highly accurate in size and shape. All CNC machined parts are highly reliable because of the three characteristics of machining accuracy inherent in CNC technology. These are extreme dimensional, positional and shape accuracy.

Machinists make sure that the machining tolerance is within the allowable range and the highest level of precision is obtained. Tolerance is defined as the acceptable range of a dimension of a part determined by the engineers. The geometry of a part and the type of material that the part is made up of greatly affect tolerance.

Targeting a tighter tolerance can lead to additional costs due to greater production of scrap, additional fixtures, and the use of advanced measurement tools. To minimize this cost, machinists apply tight tolerances only to critical areas. By making use of CNC machines, tight tolerances can be easily obtained. High machining accuracy and highly-skilled machinists help in creating precisely machined parts that fully serve the desired purpose.

Save Time In Getting Obsolete And Unique Parts

By getting parts that have been machined according to their exact requirements, businesses are saved from wasting time in finding ready-made parts that are not being currently manufactured and are even the old stock is not available.
Businesses may also require customized parts when they have to complete a project with quick turn-around time. When the time is less, it is easier to get custom parts than to search for required parts in the market.

It may also be the case that a business may require some unique parts for certain projects that are not available in the manufacturers’ catalogs. If a business lacks resources, which are unique parts in this case, to carry out these special projects, its clients will turn to its competitor and will probably not return back even in the distant future.

In this case, also, custom parts come to the rescue. By getting custom parts, a business can go ahead and grab these special projects, and earn clients for life. For any project, when parts are available to businesses in time, their business schedule is not delayed. They can readily put these parts to work.

Get Identical Parts Easily

If more custom parts are required by a business, a CNC machine shop can readily provide them. This is because the design is stored on a computer. New parts that are manufactured are identical to the previous batch of parts. This is quite beneficial for manufacturing businesses, for example, if some of the machines of a manufacturer have stopped working and require steel parts to function again, then the custom steel parts that are identical to the previously used steel parts can be readily obtained.

Difficult-to-Process Materials Can Be Used

Some materials cannot be machined easily. For example, plastic, bronze, stainless steel, etc. require sophisticated CNC machining equipment. These materials cannot be just run through standard equipment and processes to get the desired results.
To get machined parts made of these materials, a business can contact an expert custom machine shop that uses specialized equipment to work on difficult-to-process materials.

Custom Parts Can Be Made From Existing Parts

A business may be having a large number of parts that it thinks are of no use. These parts can be modified and customized to bring them into some other use. For example, the parts of discarded machines can be altered and put to use in other machines that need those parts. This saves a lot of time and money for a business.

Streamlined Production

When a business has a tie-up with the manufacturer of custom parts, it does not have to rely on suppliers of ready-made parts. Custom parts are available whenever they are required. So, the production process of business works in a streamlined way as it does not suffer because of the unavailability of parts. With an efficient production process, a business gets the benefit of faster turn-around time.

Moreover, if in case, a business wants some last-minute changes in the parts, these changes can be easily incorporated in the custom parts by a machine shop.

Wide Application

CNC machined parts find use in a large number of industries including automotive, robotics, oil and gas, defense, mining, medical, electronics, etc. As these parts entail extreme accuracy, they are used in highly sensitive fields like defense, aerospace and aeronautics.

It becomes clear from the above discussion that there are plenty of benefits of custom machined parts to businesses. When businesses get parts that fully meet their specifications and are highly accurate, their production process becomes more efficient and they achieve a competitive edge.

Materials 101: Entrepreneur’s guide to selecting the Right CNC Machining Material

by admin | Jul 24, 2018 | CNC Machining, CNC Machining Guides

Right materials make the best applications.

Material selection is a crucial step to get your CNC project right. Think of it as assembling a Subway meal based on your diet plan; you add meats if your diet chart asks for more protein, and greens for a vitamin fulfill. Similarly, selected materials must cover your design prerequisites— hardness, rigidity, thermal stability, and chemical resistance just to name a few. And your budget as well, of course.

Material characteristics are especially important when you require high precision CNC machined parts with complex designs. For instance: amorphous materials like metallic glass and polymers generally hold tighter tolerances than, say, aluminum.

In the following article, we will elaborate more on material types, their characteristics, tips and guidelines on choosing the right materials, and more. Let’s start with the basic: the material selection process.

CNC Materials Selection Process
If you’ve decided to jump the CNC machining wagon, have a valid prototype handy and your budget figured out, it’s time to select the best suitable materials for your project. The basic three steps to material selection are:

Step 1. Define your material requirements: Based on your design, make a high-level list of material prerequisites. Do you need a malleability? Or perhaps a sturdier material? Laser polishing for a surface finish? Consider all the mechanical, physical, environmental, and budget factors.

Step 2. Pin down qualified materials: Identify potential candidates that fulfill your material requirements. Notice, we’re are focusing on ‘candidates’ not ‘candidate’. There’s a solid reason behind it. Have a look:

Here’s what Ronald E. Giachetti, of National Institute of Standards and Technology, wrote in his paper on Manufacturing Process and Material Selection During Conceptual Design:

“The material and manufacturing process selection is performed early in the product development process. At this stage, it is inappropriate to select a single material or process without evaluating all the alternatives. The selection of sets of possible candidate materials and processes allow for greater flexibility in the product development process. The more alternatives, the greater the manufacturing flexibility.”

Hack: Make sure you approach readily available materials— it’ll help cut costs and efforts.

Step 3. Now, select the most appropriate material: The third step is the final showdown: choosing the material with maximum functionality in minimum costs. Or, the materials that check most on your prerequisites list.

In the next section, we will talk about the most popular materials and their properties.

CNC Material Selection- Guidelines

Metals
Most common metals in the CNC machining universe are:

1. Aluminum
Most popular of the bunch; used for both mechanical and aspect components.
(a) Physical properties:
● Medium physical strength (<500 MPa) (Note: Aluminium 7075 is one of the strongest metals at >500 MPa; but it’s a bit pricey)
● Corrosion resistance
● Temperature resistance (<400°C)
(b) Mechanical properties:
● High machinability. Can be machined quicker than other metals
● Readily available; inexpensive
(c) Industries:
● Automotive ( gears and shafts etc.)
● Aerospace (aircraft fittings etc.)
● Healthcare (medical equipment)
● Consumer electronics (electronic housings)

2. Cold Rolled Steel
(a) Physical properties:
● High physical strength (Increases the strength of the finished product by 20%)
● Provides perfect precision as it creates smaller products
● Can handle tighter tolerances
(b) Mechanical properties:
● Medium machinability.
● Moderately expensive
(c) Industries:
● Manufacturing (Machinery parts)
● Aerospace (aircraft fittings etc.)
● Construction
● Consumer electronics (electronic housings, Jigs & fixtures)

3. Stainless Steel
(a) Physical properties:
● Hardness
● Chemical resistance
● High strength (>500 MPa)
● Temperature resistance ( Very high >500°C)
● Corrosion resistance
(b) Mechanical properties:
● Good machinability
● Inexpensive
(c) Industries:
● Automotive
● Aerospace (aircraft fittings etc.)
● Healthcare (surgical equipment)
● Consumer electronics (electronic housings)
● Food Industry
● Marine applications
● Chemical Processing
● Marine applications

4. Brass
Used for high volume applications.
(a) Physical properties:
● Medium strength
● Natural Corrosion resistance
● Low-Temperature resistance (<250°C)
● High tensile strength
(b) Mechanical properties:
● High machinability.
● Readily available; moderately expensive
(c) Industries:
● Automotive ( mechanical parts, valves & nozzles)
● Architecture
● Healthcare (medical equipment
● Consumer goods
● Electrical hardware

Exotic alloys

1. Inconel
(a) Physical properties:
● Temperature resistance
● Corrosion resistance
● Medium strength
(b) Mechanical properties:
● Moderate machinability
● Moderately expensive
(c) Industries:
● Automotive
● Aerospace
● Healthcare
● Consumer electronics

2. Copper
(a) Physical properties:
● Highest electric conductivity
● High corrosion resistance
● Thermal conductivity
● Low chemical resistance (especially to acids, halogens sulphides, and ammonia solutions)
(b) Mechanical properties:
● High machinability. Can be machined quicker than other metals
● Readily available; moderately expensive
(c) Industries:
● Automotive (cooling systems and heat exchanger, valves and radiators etc)
● Aerospace Healthcare (medical equipment)
● Consumer electronics (electronic housings)

Outside of this wide range of metal materials, it’s also possible to use plastics, wood, and even fiberglass and foams with CNC machining technology.

Plastics

1. PVC
(a) Physical properties:
● High strength
● Corrosion resistance
● Temperature resistance
● Chemical resistance
(b) Mechanical properties:
● High machinability
● Readily available; inexpensive
(c) Industries:
● Automotive
● Aerospace
● Healthcare
● Consumer electronics
● Food Industry
● Chemical

2. Nylon
(a) Physical properties:
● High physical strength
● Good impact strength
● High corrosion and abrasion strength
(b) Mechanical properties:
● High machinability. Can be machined quicker than other metals
● Readily available; inexpensive
(c) Industries:
● Automotive (insulators, bearings)
● Aerospace
● Healthcare
● Consumer electronics

Now that you know about different materials, you can select the ones that best suit your CNC project. We, at Machining Design Associated Ltd., offer exceptional CNC machining parts with desired tolerances. Get in touch to know more!

Complete Guide to CNC Machining Parts & Components

What are CNC Machining Parts?

Why use CNC Machining Parts?