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CNC Machining Blog

The YuanYi blog shares practical knowledge from our day-to-day experience in CNC machining and precision manufacturing. We write to help engineers, designers, and buyers better understand materials, machining methods, tolerances, surface finishes, and part design, making it easier to plan projects and make better manufacturing decisions.

CNC end mill cutting tool showing flutes, cutting edges, shank, and tool geometry
What Is an End Mill? Types, Uses & Selection Guide

An end mill is a rotary cutting tool used in CNC milling to machine slots, pockets,...

CNC tool deflection showing a long end mill bending while machining a deep aluminum pocket
CNC Tool Deflection: Causes, Effects & How to Reduce It

Tool deflection occurs when a cutting tool bends slightly under machining forces, causing the cutting edge...

CNC deburring process showing external edge hole exit and internal cross hole burrs on an aluminum manifold
Deburring in CNC Machining: Methods, Tools & Design Guidelines
Deburring removes unwanted raised metal from CNC-machined edges and holes. Cutting, brushing, and abrasive methods are...
CNC knurling process creating a diamond pattern on an aluminum cylindrical part using knurling wheels
Knurling in CNC Machining: Types, Methods & Design Guidelines

Knurling is a machining process that creates a repeating pattern of straight, diagonal, or diamond-shaped ridges...

First article inspection of a CNC machined aluminum bracket using a CMM and engineering drawing
First Article Inspection (FAI): Process, Report & CNC Machining Guide

First Article Inspection (FAI) is a documented verification process used to confirm that a manufacturing process...

CNC undercut machining using a lollipop cutter to machine a hidden groove inside an aluminum housing
CNC Undercuts: Types, Machining Methods & Design Guidelines

CNC undercuts are recessed features that cannot be fully reached by a standard end mill from...

Tolerance stack up analysis in a CNC machined aluminum housing assembly showing accumulated dimensions and axial clearance
Tolerance Stack-Up Analysis: Worst-Case vs RSS With Examples

Tolerance stack-up analysis calculates how dimensional variations from multiple parts combine to affect the fit and...

Deep hole drilling process showing a long drill machining a deep hole in a CNC aluminum component
Deep Hole Drilling: Methods, Challenges & CNC Design Guidelines

Deep hole drilling is a machining process used to produce holes with a high depth-to-diameter ratio....

Dowel pin hole tolerances showing precision steel locating pins fitted into CNC machined aluminum plates
Dowel Pin Hole Tolerances: Press Fit, Slip Fit & Size Guide

Dowel pin hole tolerance determines whether a locating pin fits tightly, slides freely, or requires force...

Reaming vs boring comparison showing a multi-flute reamer and single-point boring tool machining aluminum holes
Reaming vs Boring: Differences, Accuracy, Surface Finish & Cost

The main difference between reaming and boring is how they improve an existing hole. Reaming uses...

Metric and imperial clearance hole size chart illustrated with CNC machined aluminum plates and screws
Clearance Hole Size Chart: Metric & Imperial Screw Sizes

A clearance hole is an unthreaded hole slightly larger than a screw or bolt, allowing the...

Ball bearing dimensions showing inner diameter, outer diameter, and width of a 6205 bearing
Ball Bearing Sizes Chart: Dimensions, Codes & Fit Guide

Ball bearing sizes are defined by three dimensions: inner diameter (ID), outer diameter (OD), and width....

304-steel-vs-316
304 Steel vs 316 Stainless Steel Cost: Which One is Right for Your Project?

Learn everything you need to know about the differences between 304 steel and 316 stainless steel,...

are-brass-casings-magnetic
Are Brass Casings Magnetic? Understanding Their Properties and Applications

Have you ever wondered at what temperature titanium melts? This isn’t just a curious question –...

aluminium-magnetic
Exploring Aluminum’s Magnetic Properties: Why It Matters in Manufacturing

Have you ever wondered why aluminum doesn’t stick to magnets like your refrigerator door? That’s what...

titanium-strength-vs-steel
Titanium Strength vs Steel: Key Differences and Best Applications

Have you ever wondered why some materials are stronger than others? While titanium is well-known for...

at-what-temperature-does-titanium-melt
At What Temperature Does Titanium Melt? Best Practices for Melting Titanium

Learn everything you need to know about the temperature at which titanium melts, its applications, and...

how-dense-is-aluminum
How Dense is Aluminum? Understanding Aluminum Alloy Density and Its Applications

Learn everything about the Density of Aluminum Alloy and how it affects your manufacturing processes. Explore...

Density-in-kg-m³
Complete Guide to Steel Density in kg/m³: Key Insights & Uses

Learn everything about the Density of Steel kg/m³ and its impact on your manufacturing process. Explore...

brass-material-density
Understanding Brass Material Density: Best Practices and Applications

Discover the essential guide to brass material density and weight per cubic inch. Explore key specs,...

CNC cutting tools selection guide for precision machined parts
CNC Cutting Tools: Types, Materials, Coatings, and Selection Guide

CNC cutting tools are the tools that physically remove material during milling, turning, drilling, boring, threading,...

What is a bottoming tap
What Is a Bottoming Tap? A Guide to Blind Hole Threading

A bottoming tap is a thread-cutting tool with a very short chamfer, typically about 1–2 threads....

Types of CNC machines
Types of CNC Machines: 9 Common Types and How to Choose

The main types of CNC machines include CNC mills, lathes, Swiss machines, mill-turn centers, gantry machines,...

Counterbore vs countersink
Counterbore vs Countersink: Differences, Uses & How to Choose

A counterbore and a countersink are both recessed hole features used to seat fastener heads, but...

NPT thread size chart with dimensions TPI and tap drill sizes
NPT Thread Size Chart: Dimensions, TPI & Tap Drill Sizes

NPT (National Pipe Taper) is a 60° tapered pipe thread commonly used for fluid, pneumatic, and...

Honing process
Honing Process: How It Works, Types, Tolerances & Applications

Honing is a precision abrasive machining process mainly used to finish internal bores. A honing tool...

6 Essential Wood Lathe Turning Tools
6 Essential Wood Lathe Turning Tools and What They Are Used For

The six essential wood lathe turning tools are a spindle roughing gouge, spindle gouge, bowl gouge,...

38-16 tap drill size guide showing drill bit and threaded hole
3/8-16 Tap Drill Size: Complete CNC Machining Guide

When making a threaded hole, it is important to select the right drill size to ensure...

CNC machining engineering drawing guide
Engineering Drawing Symbols and Abbreviations: Complete Guide for CNC Machining

When you send a CNC machining project to a manufacturer, one of the first things engineers...

CNC machining software workflow showing CAD CAM programming, toolpath simulation, and CNC manufacturing process
How CNC Machining Software Improves Production Efficiency

CNC machining software improves production efficiency by helping engineers create better toolpaths, reduce programming time, prevent...

Examples of CNC machined parts made with a CNC machine including metal brackets, housings, shafts, and industrial components
What Can You Make With a CNC Machine? CNC Products & Applications

A single CNC machine is capable of producing thousands of different items, ranging from simple brackets...

CNC milling machine engraving a precision aluminum part
Can a CNC Machine Engrave Metal?

Yes. CNC machine tools can not only machine metal parts, but also engrave text, numbers, logos,...

CNC machining datum reference showing precision part positioning
What Are Datums in CNC Machining? Definition, Types, and Applications

A datum in CNC machining serves as a theoretical reference point, line, or plane that helps...

CNC machining tolerances inspection using CMM measurement
CNC Machining Tolerances: Standards and Accuracy

Modern CNC machining tolerances are influenced by several factors such as the machine’s performance, the characteristics...

CNC wire EDM machine cutting a metal workpiece in a precision machining workshop
What Is a CNC Wire Cut Machine? Wire EDM Process Explained

Wire EDM is like slowly cutting through a metal material with a “live wire.” Its cutting...

CNC milling center
What Is a CNC Machine Shop?

A CNC machine shop is a manufacturing facility that uses CNC machine tools to produce custom...

Engineer reviewing a CAD model for 5-axis CNC machining design and DFM analysis
How to Design Parts for 5 Axis CNC Machining: Practical DFM Tips

Five-Axis Machining does indeed allow access to parts from multiple angles and reduces the number of...

5-axis CNC programming with CAM toolpaths for complex aluminum part
What Is 5-Axis CNC Programming? Toolpaths, CAM & Simulation

5-axis CNC programming is the process of creating toolpaths for a 5-axis CNC machine. The programmer...

What is Rapid Prototyping
What Is Rapid Prototyping? Methods & CNC Applications

Rapid prototyping plays an important role in the development of products.It allows for the fast production...

What is broaching machining
What Is Broaching Machining? How It Works, Types & Common Applications

In modern mechanical manufacturing, CNC milling and CNC turning are widely known, while broaching machining is...

What Is a CNC Router Machine
What Is a CNC Router Machine? Everything You Need to Know

A CNC router is a machining device that uses computer programs to automatically control the movement...

What Is Electron Beam Machining
What Is Electron Beam Machining? Process, Advantages & Applications

Electron Beam Machining is a high-precision, non-traditional machining process that utilizes the high energy generated by...

What Is Runout in Machining
What Is Runout in Machining? Causes, Effects & How to Reduce It

In CNC machining, even if the machine tool has very high precision, runout in the cutting...

How to Program a CNC Machine
How to Program a CNC Machine: A Beginner’s Guide

CNC programming typically involves creating a CAD model, generating toolpaths in CAM software, outputting G-code, and...

Manual milling machine operation with machinist
Manual Milling: Process, Machines, Applications & CNC Comparison

Manual milling is a machining process where an operator controls the movement of the machine instead...

Top 10 CNC Milling Companies in China
Top 10 CNC Milling Companies in China (2026 Guide)

China has many machine shops, but the machinery they use, their engineering knowledge, and their quality...

Top 8 5 Axis CNC Machining Manufacturers in China
Top 8 5 Axis CNC Machining Manufacturers in China (2026)

China has emerged as one of the world’s leading destinations for 5 axis CNC machining, offering...

Top Advantages of 5-Axis CNC Machining for Complex Parts
Top Advantages of 5 Axis CNC Machining for Complex Parts

For parts with complex structures and high precision requirements, traditional 3-axis machining typically requires multiple setups,...

CNC Lathe Machine
What Is a CNC Lathe Machine? Types, Parts & Applications Explained

A CNC lathe is an automated turning machine that uses pre-programmed instructions to control the machine’s...

What Is CNC Milling
What Is CNC Milling? Process, Machines, Materials, Costs & Design Tips

CNC milling is a computer-controlled subtractive manufacturing process that uses a rotating multi-blade tool to remove...

mr1-cnc-mill
MR1 CNC Mill Mastery: The Complete Guide to Precision Desktop Machining

Complete Guide to MR1 CNC Milling Machine: Discover Key Features, Technical Specifications & Industry Applications. Master...

bantam desktop cnc
Bantam Desktop CNC Mastery: The Complete Guide to Precision Desktop Machining

Complete Guide to Bantam Desktop CNC: Discover Key Features, Industry Applications & Best Practices. Access Precision...

flour-mills
Flour Mills Mastery: The Complete Guide to Grain Grinding Technology & Solutions

Discover the complete guide to CNC milling and grinder solutions. Learn best practices, key features, and...

home-mill
Home Mill Mastery: The Complete Guide to Precision CNC Machining & Workshop Solutions

Discover the power of a home mill for superior grain processing. Our complete guide covers best...

best mill
Finding the Best Mill for Your Home: The Complete Guide to Grain Grinding Excellence

Discover the best mill for your home with our complete guide. Learn key features, selection criteria...

precision micromachining
The Complete Guide to Precision Micromachining: How to Master Small-Scale Manufacturing

Unlock the potential of precision micromachining. Our complete guide covers best practices, selection criteria, and future...

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