TURNING – NEGATIVE INSERTS GRADE SELECTION GUIDE

TURNING – NEGATIVE INSERTS GRADE SELECTION GUIDE - Optimize Your Machining

Master Grade Selection for Maximum Performance

Unlock the full potential of your TURNING – NEGATIVE CNGA/DNGA/VNGA inserts with our comprehensive grade selection guide. Understanding carbide grades ensures optimal performance, maximum tool life, and superior surface finish across all your turning applications.

Grade Technology Overview

🔬 Substrate Development

Ultra-fine grain carbide

Controlled cobalt content

Optimized grain structure

Enhanced thermal properties

🛡️ Advanced Coating Systems

Multi-layer CVD technology

Nano-structured PVD coatings

Gradient interface technology

Enhanced adhesion strength

Comprehensive Grade Chart

 

Grade	Coating	Hardness	Application	Speed Range
KC5010	PVD TiAlN	1600 HV	Steel finishing	400-800 SFM
KC5025	CVD TiCN/Al₂O₃	1550 HV	Steel roughing	300-600 SFM
KC5510	CVD Multi-layer	1650 HV	Cast iron	250-500 SFM
VP15TF	PVD TiAlN/TiSiN	1700 HV	Stainless steel	200-400 SFM
VP20TF	PVD Nano-composite	1750 HV	Difficult materials	150-350 SFM
VP30TF	CVD TiCN/TiN	1500 HV	General purpose	250-550 SFM

Material-Specific Recommendations

🔧 Carbon & Alloy Steels

Finishing: KC5010 at 500-800 SFM

General: KC5025 at 400-600 SFM

Roughing: KC5025 at 300-500 SFM

⚙️ Stainless Steels

Austenitic: VP15TF at 200-350 SFM

Martensitic: VP20TF at 150-300 SFM

Precipitation Hardening: VP20TF at 100-250 SFM

🎯 Cast Irons

Gray Iron: KC5510 at 300-500 SFM

Ductile Iron: KC5510 at 250-400 SFM

Alloyed Iron: KC5525 at 200-350 SFM

✈️ Aerospace Materials

Titanium: VP20TF at 150-250 SFM

Inconel: VP20TF at 100-200 SFM

Waspaloy: Specialized grades available

Troubleshooting Guide

 

Problem	Cause	Solution
Excessive wear	Wrong grade	Select harder grade
Built-up edge	Coating failure	Use smooth coating
Edge chipping	Grade too hard	Select tougher grade
Poor finish	Wrong geometry	Try different chipbreaker
Chip control	Wrong chipbreaker	Match to feed rate

Performance Optimization

⚡ Speed Recommendations

Start at lower range

Increase based on results

Monitor tool wear patterns

Adjust for machine rigidity

🔧 Feed Optimization

Match to chipbreaker

Consider surface finish

Balance with speed

Monitor chip formation

📊 Depth of Cut

Consider insert strength

Machine power available

Workpiece rigidity

Surface finish requirements

Cost-Performance Analysis

 

Grade	Price Index	Life Index	Cost per Part	Best Value
KC5010	1.2	2.5	0.48	✓ Finishing
KC5025	1.0	2.0	0.50	✓ General
VP15TF	1.3	3.0	0.43	✓ Stainless
VP20TF	1.5	3.5	0.43	✓ Difficult

Selection Success Factors

✅ Match grade to material - Consider hardness, machinability

✅ Consider operation type - Roughing vs. finishing requirements

✅ Evaluate cutting parameters - Speed, feed, DOC combinations

✅ Monitor performance - Track tool life, surface finish

✅ Optimize continuously - Adjust based on results

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🎯 The right grade makes all the difference. Consult our experts for optimal selection!

 

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