DNGA Negative Turning Insert 55° Diamond

DNGA Negative Turning Insert 55° Diamond

 

Optimized Geometry for Superior Chip Control

Master precision turning operations with our TURNING – NEGATIVE DNGA inserts, featuring 55° diamond geometry and negative rake design. These specialized inserts provide exceptional chip control and surface finish while maintaining the robust cutting edge needed for demanding applications.

DNGA Design Advantages

🔧 55° Diamond Angle

Excellent for profile turning

Superior chip flow control

Reduced cutting forces vs. 80° diamonds

Perfect for copy turning operations

⚡ Negative Rake Strength

0° clearance angle for maximum support

Handles interrupted cuts with ease

Perfect for hardened materials up to 65 HRC

Extended tool life in tough conditions

Premium Specifications

 

Specification	Standard
Insert Type	DNGA (55° Diamond Negative)
Clearance Angle	0°
Included Angle	55°
Tolerance	M Class (±0.002")
Coating	Multi-layer PVD
Substrate	Ultra-fine grain carbide
Edge Prep	Honed 0.002-0.004"

Comprehensive DNGA Range

 

Model	Inscribed Circle	Thickness	Nose Radius	Application
DNGA 150404	9.525mm	4.76mm	0.4mm	Precision finishing
DNGA 150408	9.525mm	4.76mm	0.8mm	General purpose
DNGA 150412	9.525mm	4.76mm	1.2mm	Medium roughing
DNGA 110404	6.35mm	3.18mm	0.4mm	Small part finishing
DNGA 110408	6.35mm	3.18mm	0.8mm	Precision work
DNGA 070304	4.76mm	3.18mm	0.4mm	Micro-machining

Advanced PVD Coating Technology

🛡️ TiAlN/TiSiN Multi-layer

Layer 1: TiAlN for high-temperature resistance

Layer 2: TiSiN for extreme hardness

Final Layer: Smooth finish for chip flow

Performance Benefits:

Operating temperature: 900°C

Hardness: 3500 HV

Friction coefficient: 0.4

Tool life increase: 250%

Application Excellence

🔧 Precision Engineering

Medical component machining

Aerospace fittings

Hydraulic components

Precision shafts

⚙️ Automotive Sector

Fuel injection components

Valve seat machining

Transmission shafts

Steering components

📱 Electronics Industry

Connector machining

Housing components

Heat sink finishing

Precision pins

Optimized Cutting Data

 

Material Group	Cutting Speed	Feed Rate	Depth of Cut
Low Carbon Steel	400-600 SFM	0.004-0.012 IPR	0.020-0.080"
Alloy Steel	300-450 SFM	0.003-0.010 IPR	0.015-0.060"
Stainless Steel	200-350 SFM	0.002-0.008 IPR	0.010-0.050"
Cast Iron	250-400 SFM	0.005-0.015 IPR	0.030-0.100"
Aluminum	600-1000 SFM	0.006-0.020 IPR	0.040-0.120"

Specialized Chipbreakers

 

Type	Code	Application	Feature
Light Finishing	LF	0.002-0.006 IPR	Excellent surface finish
Medium Finishing	MF	0.005-0.012 IPR	Balanced performance
Light Roughing	LR	0.010-0.020 IPR	Strong edge support

Setup Recommendations

🎯 Tool Holder Selection

PDJNR/L series for external turning

PDTNR/L series for facing

MDJNR/L for copy turning

Minimum 8° lead angle

⚙️ Machine Requirements

Rigidity for negative rake geometry

Power for increased cutting forces

Stable spindle bearings

Precise feed control

Success Metrics

✅ Surface Finish: Ra 0.2-0.8 μm achievable

✅ Dimensional Accuracy: ±0.01mm consistency

✅ Tool Life: 40% longer vs. positive inserts

✅ Chip Control: 95% effective chip breaking

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🎯 Need precision turning solutions? Our DNGA inserts deliver! Request your quote today!

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