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Description
DNMG 150408 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 | 0.8 mm |
| ANSI code | DNMG 432 |
Cutting data for the DNMG 150408 insert for steel and stainless 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 | 0.1 | 0.1 | 180-270 | 0.2 | 0.4 | 170-220 | 0.4 | 1.5 |
| MStainless steel | 125-260 | 0.1 | 0.1 | 100-220 | 0.2 | 0.4 | 80-200 | 0.4 | 1.5 |
AE9015 cemented carbide indexable insert – applications and design
double-sided 55° diamond with a hole and chip breaker
The DNMG 150408 turning insert is a double-sided, diamond-shaped indexable insert made of grade AE9015 cemented carbide, designed for turning structural steels, alloy steels, and cast steel. Shape D, a diamond with a 55° corner angle, combines good access to the workpiece contour with the ability to perform longitudinal and copy turning. The negative geometry with a 0° clearance angle allows both sides of the insert to be used — providing a total of four cutting edges. The nose radius rε of 0.8 mm is a general-purpose option that balances surface finish with corner strength at feed rates of 0.2–0.4 mm/rev. The hole with a chip breaker on both sides (type G according to ISO 1832) controls chip flow during semi-finishing and roughing.
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 for ISO group P — CVD-coated carbide (P10-P30) for steel and cast steel, including applications with elevated cutting temperatures.
- Corner radius rε 0.8 mm — a general-purpose option spanning finishing and roughing, without changing the insert between operations.
- Tolerance class M provides repeatable edge positioning after rotating the insert in the pocket, stabilizing dimensions throughout a production run.
- The 55° corner angle facilitates copy and profile turning, where the cutting edge enters workpiece corners at varying angles.
- Dimensions according to ISO 1832: edge length 15.5 mm, IC 12.7 mm (1/2″), thickness 4.76 mm — fit holders with a 15 pocket.
Applications and cutting data selection for the diamond-shaped insert
The double-sided design reduces the cost per cutting edge: when one corner is worn, simply rotate or flip the insert in the pocket without replacing the entire insert. Tolerance class M ensures repeatable edge positioning after each rotation, keeping workpiece dimensions stable throughout the production cycle.
The DNMG 150408 insert (also written without spaces as dnmg150408) is suitable for turning shafts, bushings, flanges, and forgings made of steel and cast steel, including applications where high temperatures develop in the cutting zone. The CVD coating of grade AE9015 increases abrasion resistance and maintains cutting edge hardness at elevated temperatures, supporting stable performance under demanding conditions. Calculate spindle speed using the formula n = 1000·Vc/(π·D): for a shaft with a diameter of 50 mm at Vc = 250 m/min, the result is approximately 1592 rpm. For precision machining, select a lower feed rate and depth of cut; for roughing, increase ap up to 1.5 mm at a feed rate of 0.4 mm/rev. When turning stainless steel, keep the cutting speed at the lower end of the range and maintain a constant feed rate to limit work hardening of the layer being cut. Grade AE9015 indexable inserts are supplied by the Korean brand Horn.
▲
Application limitation
Grade AE9015 is a carbide in group ISO P for steel and cast steel — it is not intended for hardened steels above 45 HRC. For hard turning, select an insert with a cubic boron nitride (CBN) cutting edge.
Rhombic insert designation decoder according to ISO 1832
how to read the DNMG 150408 code — designation positions 1–7
Designation DNMG 150408 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
tool holders with a diamond-shaped 15 pocket — external turning of steel and stainless steel
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 150408 insert
number of cutting edges, turning tool selection, and materials for turning
Four — the 55° diamond has 2 corners per side, and the negative geometry (0° clearance angle) allows both sides of the insert to be used. When a corner becomes dull, simply rotate or flip the insert in the pocket without changing the tool 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 used for finishing at low feed rates, 0.8 mm is the general-purpose version, and 1.2 mm is selected for roughing at higher feed rates. The remaining dimensions (IC 12.7 mm, thickness 4.76 mm) are identical.
Grade AE9015 is a carbide in group ISO P10-P30 with a CVD coating, designed for turning structural steels, alloy steels, and cast steel, including at elevated cutting temperatures. When turning stainless steel, use lower speeds and a constant feed rate to limit work hardening of the layer being cut.
Product accessories
Carbide insert DNMG 150404 TM AE9015 Horn
Reference: 0000003779 In stock > 10 items
€9.21
€11.33 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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