CNC Knowledge Base for Machinists & Engineers
Free CNC machining knowledge base from CNCHome-Beyond: tool selection, insert grades, speeds & feeds, materials, coatings, and troubleshooting.
CNC Knowledge Base
Free technical resources for B2B engineers, machinists, and procurement teams. Tool selection, speeds & feeds, insert grades, materials, coatings, and troubleshooting.
📚Browse by Topic
Six core knowledge areas covering the most common questions our engineering team gets from B2B buyers.
Tool Selection
Choosing the right insert, holder, and tool geometry for your operation and material.
Speeds & Feeds
Calculating cutting speed (Vc), spindle speed (RPM), feed rate (fn), and depth of cut (ap).
Materials & Grades
Workpiece material properties, machinability ratings, and matching carbide grades.
Coatings & Geometry
CVD vs PVD coatings, chip-breaker design, and how geometry affects chip flow.
Purchasing & Sourcing
Bulk orders, sample requests, freight, customs, and B2B payment workflows.
Troubleshooting
Diagnose poor surface finish, premature wear, chipping, vibration, and short tool life.
🛠️Free Engineering Tools
Online calculators and selectors used daily by our B2B customers. No login required.
Insert Grade Cross-Reference
Material → recommended grade, coating, and geometry
Speeds & Feeds Calculator
Vc, RPM, fn, ap for turning, milling, drilling
Insert & Holder Selector
Match inserts to compatible tool holders
Mitsubishi Grade Finder
Find BEYOND/OYYU equivalents to 20 Mitsubishi grades
HS Code & Duty Tool
Look up HS code and estimate customs duty
Freight Calculator
Real-time shipping cost by destination
ANSI/ISO Converter
Convert between ANSI and ISO insert standards
Tolerance Calculator
ISO 286 fit and tolerance calculations
📖Featured Articles
Long-form technical content from our engineering team. New articles published monthly.
Best Carbide Inserts for Stainless Steel Machining in 2026
Complete buyer’s guide covering grade selection, geometry, speeds/feeds, and top brand recommendations for SS304, SS316, and duplex stainless.
Read article →Sandvik vs Mitsubishi vs Kennametal: Insert Brand Comparison
Side-by-side grade comparison across 8 materials. We map equivalent grades across brands and recommend when to choose which.
Read article →Understanding CVD vs PVD Coatings
Why some inserts work better at high temperatures, and how to choose the right coating for your application.
Read article →Premature Insert Wear: 7 Common Causes and Fixes
Flank wear, crater wear, chipping, built-up edge, plastic deformation — diagnosis flowchart and recommended actions.
Read article →How to Read an Insert Grade Code
CNMG120408-PR 8825 — what every letter and number means. Decode any insert spec from any brand.
Read article →How [Customer] Cut Tool Costs 30% with Grade Conversion
Real B2B case study: how an automotive tier-1 supplier switched from premium imported inserts to BEYOND equivalents with no quality loss.
Read article →❓Frequently Asked Questions
Six common knowledge questions from B2B engineers and procurement teams.
Where can I learn about CNC insert grade selection?
How do I calculate cutting speeds and feeds?
What is the difference between CVD and PVD coatings?
How do I know when an insert is worn out?
Can I use the same insert for steel and stainless steel?
What is the difference between CNMG and CNMG insert geometries?
Need a Specific Answer We Don’t Cover?
Email our engineering team with your material, operation, and current setup. We respond within 24 hours.
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