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Description
DNMG 150404 turning insert – indexable 55° diamond
| Technical data | |
|---|---|
| Side length l | 15.5 mm |
| Insert thickness s | 4.76 mm |
| Hole diameter d1 | 5.16 mm |
| Corner radius rε | 0.4 mm |
| ANSI code | DNMG 431 |
Cutting data for the DNMG 150404 insert for steel and cast steel
finishing, semi-finishing and roughing — ISO P and M groups
| Material | Finishing | Semi-finishing | Roughing | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Vc [m/min] | Feed f [mm/rev] | ap [mm] | Vc [m/min] | Feed f [mm/rev] | ap [mm] | Vc [m/min] | Feed f [mm/rev] | ap [mm] | |
| PSteel | 250-350 | 0.05 | 0.1 | 180-270 | 0.15 | 0.4 | 170-220 | 0.25 | 1.5 |
| MStainless steel | 125-260 | 0.05 | 0.1 | 100-220 | 0.15 | 0.4 | 80-200 | 0.25 | 1.5 |
AE9015 carbide indexable insert – applications and design
double-sided 55° diamond with a hole and chip breaker
The DNMG 150404 turning insert is a double-sided rhombic indexable insert with a 55° corner angle, made of grade AE9015 cemented carbide. The sharp, elongated 55° tip facilitates profile turning, copy turning, and access to the workpiece contour. Negative geometry with a 0° clearance angle allows both sides of the insert to be used, providing a total of four cutting edges. CVD-coated grade AE9015 covers ISO group P10-P30, for machining steel and cast steel, including demanding thermal conditions.
The CVD coating applied to the carbide substrate forms a thermal barrier and increases abrasion resistance, allowing the edge to retain its sharpness at higher cutting speeds. Grade AE9015 is suitable for continuous and lightly interrupted turning of carbon steels, alloy steels, and cast steel. Tolerance class M ensures repeatable corner positioning after rotating the insert in the tool holder pocket. The mounting hole with a chip breaker on both sides controls chip flow and breaking, facilitating chip evacuation from the cutting zone.
Key benefits of the AE9015 cemented carbide insert
- Four cutting edges — 2 corners on each of the two sides reduce the cost per cutting edge compared with single-sided inserts.
- Grade AE9015 with CVD coating — ISO group P10-P30: steel and cast steel, with resistance to high cutting temperatures.
- Corner radius rε 0.4 mm — precision machining and finishing at low feeds, with low surface roughness.
- The 55° rhombic shape facilitates profile turning and copy turning — the sharp tip reaches the workpiece contour.
- Tolerance class M provides repeatable cutting edge positioning after indexing the insert in the holder pocket.
- Dimensions according to ISO 1832: side length 15.5 mm, IC 12.7 mm (1/2″), thickness 4.76 mm — compatible with tool holders with a 15 pocket.
Applications and cutting data selection for the diamond-shaped insert
The DNMG 150404 insert (also written without a space as dnmg150404) is suitable for turning shafts, bushings, and profiled components made of structural steels and cast steel. Calculate spindle speed using n = 1000·Vc/(π·D): for a shaft diameter of 50 mm at Vc = 250 m/min, the result is approximately 1591 rpm. The nose radius rε of 0.4 mm is suitable for precision machining and finishing at low feeds, ensuring low surface roughness. When semi-finishing steel, maintain a feed of approximately 0.15 mm/rev and a depth of cut up to 0.4 mm to avoid overloading the small corner. When machining cast steel, which can be nonuniform and contain hard inclusions, the stable CVD coating limits abrasive edge wear. Indexable inserts in grade AE9015 are supplied by the Korean brand Horn.
▲
Application limitation
Grade AE9015 covers the group ISO P10-P30 (steel and cast steel) — do not use it for hardened steels above 45 HRC, where a cubic boron nitride (CBN) insert is the appropriate choice. The radius rε 0.4 mm is a finishing radius — for roughing at feed rates above 0.3 mm/rev, choose the version DNMG 150408 with a larger corner radius.
Rhombic insert designation decoder according to ISO 1832
how to read the DNMG 150404 code — designation positions 1–7
Designation DNMG 150404 according to the standard ISO 1832: 4 letters describe geometry and construction, 3 numeric codes describe dimensions. Each field has a number, an icon, and a brief description.
Compatible turning tools
holders with a 15 rhombic insert pocket — external turning
TDJNR/L 2020 K150420×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
TDJNR/L 2525 M150425×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
TDJNR/L 3232 P150432×32 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
TDHNR/L 2525 M150425×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
TDHNR/L 3232 P150432×32 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
TDNNN 2020 K150420×20 × 125 mmR right-hand
←L left-hand
→
←L left-hand
→
TDNNN 2525 M150425×25 × 150 mmR right-hand
←L left-hand
→
←L left-hand
→
TDNNN 3232 P150432×32 × 170 mmR right-hand
←L left-hand
→
←L left-hand
→
No compatible boring bars are available for this insert.
Frequently asked questions about the DNMG 150404 insert
use, turning tool selection, and turning parameters
Four — the diamond has 2 usable corners of 55° on each side, and the negative geometry (0° clearance angle) allows both sides of the insert to be used. Once an edge becomes dull, simply index the insert in its pocket without changing the holder.
External turning holders with a 15 rhombic insert pocket (IC 12.7 mm): TDJNR/L (entering angle 93°), TDHNR/L (107.5°) and TDNNN (62.5°) in cross sections from 20×20 to 32×32 mm. No internal turning boring bars are specified for this insert.
Only in corner radius: 0.4 mm is a finishing radius for precision machining at low feed rates, while 0.8 mm is a more versatile version that withstands higher feed rates during roughing. The remaining dimensions — IC 12.7 mm and thickness 4.76 mm — are identical.
Yes — grade AE9015 covers the group ISO P10-P30, meaning steel and cast steel, even under difficult cutting conditions. The coating CVD increases resistance to high temperatures and abrasion, allowing the edge to withstand the nonuniform structure of cast steel.
Product accessories
Carbide insert DNMG 150408 TM AE9015 Horn
Reference: 0000013106 In stock > 10 items
€8.42
€10.36 brutto
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Shipping
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| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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