Efficient DNMG-PR indexable insert for professional machining
The DNMG...-PR turning inserts in grades RT215+ and RT225+ are excellent tools for demanding steel machining tasks. Their negative 55° rhombic shape combined with a stable PR roughing geometry creates ideal conditions for cost-effective longitudinal and facing operations. The state-of-the-art CVD coatings guarantee reliable chip evacuation even under high cutting forces and noticeably reduce wear.
Suitable materials

Technical data
- Insert shape: DNMG (55° rhombic)
- Application: Roughing
- Grade RT215+: CVD-coated P10 carbide (continuous cut)
- Grade RT225+: CVD-coated P20 carbide (continuous and light interrupted cut)
- Suitable material: Steel
- Packaging unit: 10 pieces
Dimensions of DNMG...-PR RT215+/225+
|
Item Nr. |
r |
L |
I.C |
S |
d |
| DNMG 150608-PR RT215+ |
1661911 |
0,8 |
15,5 |
12,7 |
6,35 |
5,16 |
| DNMG 150612-PR RT215+ |
1661912 |
1,2 |
15,5 |
12,7 |
6,35 |
5,16 |
| DNMG 150616-PR RT215+ |
1661913 |
1,6 |
15,5 |
12,7 |
6,35 |
5,16 |
|
Art. Nr. |
r |
L |
I.C |
S |
d |
| DNMG 150608-PR RT225+ |
1661921 |
0,8 |
15,5 |
12,7 |
6,35 |
5,16 |
| DNMG 150612-PR RT225+ |
1661922 |
1,2 |
15,5 |
12,7 |
6,35 |
5,16 |
| DNMG 150616-PR RT225+ |
1661923 |
1,6 |
15,5 |
12,7 |
6,35 |
5,16 |
Cutting data
|
Steel |
|
Vc (m/min) |
fn (mm/U) |
ap (mm) |
| DNMG 150608-PR RT215+ |
130-300 |
0,2-0,48 |
1,5-4,8 |
| DNMG 150612-PR RT215+ |
130-300 |
0,2-0,45 |
1,5-4,8 |
| DNMG 150616-PR RT215+ |
130-300 |
0,2-0,5 |
1,5-4,8 |
|
Steel |
|
Vc (m/min) |
fn (mm/U) |
ap (mm) |
| DNMG 150608-PR RT225+ |
120-240 |
0,2-0,48 |
1,5-4,8 |
| DNMG 150612-PR RT225+ |
120-240 |
0,2-0,45 |
1,5-4,8 |
| DNMG 150616-PR RT225+ |
120-240 |
0,2-0,5 |
1,5-4,8 |
Applications
The RT215+ version, as a highly wear-resistant P10 carbide, is primarily designed for full-cutting roughing of steel. If the application involves steel components with light interruptions, the tougher P20 carbide grade RT225+ offers the necessary process reliability. These inserts perform exceptionally well in high-volume turning operations and help increase productivity on CNC lathes through uniform wear characteristics.
Special features
Thanks to the dedicated PR chipbreaker, reliable chip control is maintained even at larger depths of cut up to 4.8 mm. Available with three different corner radii (0.8 mm, 1.2 mm, and 1.6 mm), these inserts provide flexible options for a wide variety of workpiece contours and feed rate requirements.