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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....

Does stainless steel rust and corrosion resistance comparison
Does Stainless Steel Rust? Stainless Steel Corrosion Explained Introduction

yes, stainless steel can rust, but it is much more resistant to corrosion than ordinary steel....

Does aluminum rust and aluminum oxidation comparison
Does Aluminum Rust? Aluminum Corrosion Explained

Aluminum does not rust in the same way as iron or steel.When aluminum comes into contact...

Does brass tarnish and brass oxidation stages
Does Brass Tarnish or Rust? Brass Oxidation Explained

Brass can tarnish over time, but it does not corrode like iron or steel.Since brass is...

Calculate the spindle speed for CNC turning.
CNC Turning Center Specifications: A Complete Guide

The specifications of a CNC turning center determine the types of parts it can machine, as...

polished stainless steel CNC machined parts with mirror finish
How to Polish Stainless Steel Parts: CNC Surface Finishing Guide

Stainless steel is commonly used in various industries such as aerospace, medical, automotive, food processing, and...

cobalt metal samples and engineering material overview
What Is Cobalt Metal Used For? Properties, Uses & Applications

Cobalt is a hard, silver-gray transition metal recognized for its strong structural qualities, magnetic characteristics, resistance...

rare earth metals samples and elements overview
What Are Rare Earth Metals? Properties, Types and Uses

Rare earth metals are a group of metallic elements that are known for having special magnetic,...

titanium metal material and CNC machined titanium components for precision manufacturing
What Is Titanium? Properties, Alloys & CNC Machining Guide

Titanium is a light yet strong metal that is highly resistant to corrosion and offers a...

CNC machined aluminum parts and raw aluminum material in a precision manufacturing workshop
Is Aluminum a Metal? Properties, Types and CNC Machining Applications

Aluminum is indeed a metal.It is a light metal that does not corrode easily and is...

How to Remove Rust from Metal
How to Remove Rust from Metal: DIY & Industrial Guide

Rust can be found in many places, such as kitchen knives, gardening tools, car parts, and...

Aluminum alloy comparison chart
5052 vs 6061 vs 7075 Aluminum: Which Alloy Should You Choose?

When comparing 5052, 6061, and 7075 aluminum, no single material is suitable for all applications. 5052...

Polish Aluminum
How to Polish Aluminum: Step-by-Step Guide to a Mirror Finish

Aluminum can typically be restored to its original luster and given a smooth or even mirror-like...

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...

cnc machine that cuts wood and metal
The Ultimate Guide to CNC Machines for Cutting Wood and Metal

Discover the ultimate CNC machine that cuts wood and metal with our comprehensive guide. Learn key...

CNC lathe versus CNC mill comparison showing a turning operation on a shaft and a milling operation on a housing
CNC Lathe vs CNC Mill: Differences, Applications & How to Choose

The main difference between a CNC lathe and a CNC mill is what rotates during machining....

cnc cheap
Affordable Precision: The Complete Guide to CNC Cheap Machines

Discover how to find a quality, cheap CNC milling machine without sacrificing performance. Our complete guide...

cnc small
Unlock Precision with CNC Small Machines: A Comprehensive Guide

Explore the complete guide to small CNC machines. Learn best practices and solutions, from key features...

budget cnc milling machine
Affordable Precision: A Complete Guide to Budget CNC Milling Machines

Discover how to find the perfect affordable CNC milling machine for your workshop with our comprehensive...

mini cnc
Master Precision at Home with a Mini CNC Machine

Explore the complete guide to household mini CNC machines: Learn about key technical specifications, industry applications,...

8 axis cnc machine
8 Axis CNC Machines: What Makes Them Different and Why You Need One

Elevate manufacturing excellence with our guide to 8 Axis CNC machines. Explore key features, industry applications...

high precision cnc router
Maximize Your Production Quality with High Precision CNC Routers

Unlock CNC efficiency with our ATC CNC machine guide. Explore CNC router auto tool changer benefits,...

used mill
Everything You Need to Know About Buying a Used Mill

Unlock CNC efficiency with our ATC CNC machine guide. Explore CNC router auto tool changer benefits,...

mini mill dro
Maximize Your Mini Mill’s Potential with Digital Readout (DRO) Technology

Unlock CNC efficiency with our ATC CNC machine guide. Explore CNC router auto tool changer benefits,...

cnc router auto tool changer
CNC Router Auto Tool Changer: Revolutionizing How We Make Parts

Unlock CNC efficiency with our ATC CNC machine guide. Explore CNC router auto tool changer benefits,...

big milling machine
Big Milling Machines: The Backbone of Large-Scale Manufacturing

Explore the ultimate guide to big milling machines. Learn about the key features, industry applications, and...

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